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 $(CROSS_COMPILE).
190 # CROSS_COMPILE can be set on the command line
191 # make CROSS_COMPILE=ia64-linux-
192 # Alternatively CROSS_COMPILE can be set in the environment.
193 # A third alternative is to store a setting in .config so that plain
194 # "make" in the configured kernel build directory always uses that.
195 # Default value for CROSS_COMPILE is not to prefix executables
196 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
200 ifneq ($(wildcard ../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9),)
201 CROSS_COMPILE ?= ../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android-
205 ifneq ($(wildcard ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6),)
206 CROSS_COMPILE ?= ../prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/bin/arm-eabi-
209 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
211 # Architecture as present in compile.h
212 UTS_MACHINE := $(ARCH)
215 # Additional ARCH settings for x86
219 ifeq ($(ARCH),x86_64)
223 # Additional ARCH settings for sparc
224 ifeq ($(ARCH),sparc32)
227 ifeq ($(ARCH),sparc64)
231 # Additional ARCH settings for sh
236 # Additional ARCH settings for tile
237 ifeq ($(ARCH),tilepro)
240 ifeq ($(ARCH),tilegx)
244 # Where to locate arch specific headers
245 hdr-arch := $(SRCARCH)
247 KCONFIG_CONFIG ?= .config
248 export KCONFIG_CONFIG
250 # SHELL used by kbuild
251 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
252 else if [ -x /bin/bash ]; then echo /bin/bash; \
253 else echo sh; fi ; fi)
257 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
260 # Decide whether to build built-in, modular, or both.
261 # Normally, just do built-in.
266 # If we have only "make modules", don't compile built-in objects.
267 # When we're building modules with modversions, we need to consider
268 # the built-in objects during the descend as well, in order to
269 # make sure the checksums are up to date before we record them.
271 ifeq ($(MAKECMDGOALS),modules)
272 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
275 # If we have "make <whatever> modules", compile modules
276 # in addition to whatever we do anyway.
277 # Just "make" or "make all" shall build modules as well
279 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
283 ifeq ($(MAKECMDGOALS),)
287 export KBUILD_MODULES KBUILD_BUILTIN
288 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
291 # ---------------------------------------------------------------------------
293 # Normally, we echo the whole command before executing it. By making
294 # that echo $($(quiet)$(cmd)), we now have the possibility to set
295 # $(quiet) to choose other forms of output instead, e.g.
297 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
298 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
300 # If $(quiet) is empty, the whole command will be printed.
301 # If it is set to "quiet_", only the short version will be printed.
302 # If it is set to "silent_", nothing will be printed at all, since
303 # the variable $(silent_cmd_cc_o_c) doesn't exist.
305 # A simple variant is to prefix commands with $(Q) - that's useful
306 # for commands that shall be hidden in non-verbose mode.
310 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
311 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
313 ifeq ($(KBUILD_VERBOSE),1)
321 # If the user is running make -s (silent mode), suppress echoing of
324 ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
328 export quiet Q KBUILD_VERBOSE
331 # Look for make include files relative to root of kernel src
332 MAKEFLAGS += --include-dir=$(srctree)
334 # We need some generic definitions (do not try to remake the file).
335 $(srctree)/scripts/Kbuild.include: ;
336 include $(srctree)/scripts/Kbuild.include
338 # Make variables (CC, etc...)
340 AS = $(CROSS_COMPILE)as
341 LD = $(CROSS_COMPILE)ld
342 CC = $(CROSS_COMPILE)gcc
344 AR = $(CROSS_COMPILE)ar
345 NM = $(CROSS_COMPILE)nm
346 STRIP = $(CROSS_COMPILE)strip
347 OBJCOPY = $(CROSS_COMPILE)objcopy
348 OBJDUMP = $(CROSS_COMPILE)objdump
350 GENKSYMS = scripts/genksyms/genksyms
351 INSTALLKERNEL := installkernel
352 DEPMOD = /sbin/depmod
356 # Use the wrapper for the compiler. This wrapper scans for new
357 # warnings and causes the build to stop upon encountering them.
358 ifneq ($(wildcard $(srctree)/scripts/gcc-wrapper.py),)
359 CC = $(srctree)/scripts/gcc-wrapper.py $(CROSS_COMPILE)gcc
362 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
363 -Wbitwise -Wno-return-void $(CF)
369 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
372 # Use USERINCLUDE when you must reference the UAPI directories only.
374 -I$(srctree)/arch/$(hdr-arch)/include/uapi \
375 -Iarch/$(hdr-arch)/include/generated/uapi \
376 -I$(srctree)/include/uapi \
377 -Iinclude/generated/uapi \
378 -include $(srctree)/include/linux/kconfig.h
380 # Use LINUXINCLUDE when you must reference the include/ directory.
381 # Needed to be compatible with the O= option
383 -I$(srctree)/arch/$(hdr-arch)/include \
384 -Iarch/$(hdr-arch)/include/generated \
385 $(if $(KBUILD_SRC), -I$(srctree)/include) \
389 KBUILD_CPPFLAGS := -D__KERNEL__
391 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
392 -fno-strict-aliasing -fno-common \
393 -Werror-implicit-function-declaration \
394 -Wno-format-security \
395 -fno-delete-null-pointer-checks \
398 KBUILD_AFLAGS_KERNEL :=
399 KBUILD_CFLAGS_KERNEL :=
400 KBUILD_AFLAGS := -D__ASSEMBLY__
401 KBUILD_AFLAGS_MODULE := -DMODULE
402 KBUILD_CFLAGS_MODULE := -DMODULE
403 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
405 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
406 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
407 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
409 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
410 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
411 export CPP AR NM STRIP OBJCOPY OBJDUMP
412 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
413 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
415 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
416 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
417 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
418 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
419 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
420 export KBUILD_ARFLAGS OBJCOPY_OUTPUT_FORMAT
422 # When compiling out-of-tree modules, put MODVERDIR in the module
423 # tree rather than in the kernel tree. The kernel tree might
425 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
427 # Files to ignore in find ... statements
429 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
430 -o -name .pc -o -name .hg -o -name .git \) -prune -o
431 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
432 --exclude CVS --exclude .pc --exclude .hg --exclude .git
434 # ===========================================================================
435 # Rules shared between *config targets and build targets
437 # Basic helpers built in scripts/
438 PHONY += scripts_basic
440 $(Q)$(MAKE) $(build)=scripts/basic
441 $(Q)rm -f .tmp_quiet_recordmcount
443 # To avoid any implicit rule to kick in, define an empty command.
444 scripts/basic/%: scripts_basic ;
446 PHONY += outputmakefile
447 # outputmakefile generates a Makefile in the output directory, if using a
448 # separate output directory. This allows convenient use of make in the
451 ifneq ($(KBUILD_SRC),)
452 $(Q)ln -fsn $(srctree) source
453 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
454 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
457 # Support for using generic headers in asm-generic
460 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
461 src=asm obj=arch/$(SRCARCH)/include/generated/asm
462 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
463 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
465 # To make sure we do not include .config for any of the *config targets
466 # catch them early, and hand them over to scripts/kconfig/Makefile
467 # It is allowed to specify more targets when calling make, including
468 # mixing *config targets and build targets.
469 # For example 'make oldconfig all'.
470 # Detect when mixed targets is specified, and make a second invocation
471 # of make so .config is not included in this case either (for *config).
473 version_h := include/generated/uapi/linux/version.h
475 no-dot-config-targets := clean mrproper distclean \
476 cscope gtags TAGS tags help %docs check% coccicheck \
477 $(version_h) headers_% archheaders archscripts \
478 kernelversion %src-pkg
484 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
485 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
490 ifeq ($(KBUILD_EXTMOD),)
491 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
493 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
499 ifeq ($(mixed-targets),1)
500 # ===========================================================================
501 # We're called with mixed targets (*config and build targets).
502 # Handle them one by one.
505 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
508 ifeq ($(config-targets),1)
509 # ===========================================================================
510 # *config targets only - make sure prerequisites are updated, and descend
511 # in scripts/kconfig to make the *config target
513 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
514 # KBUILD_DEFCONFIG may point out an alternative default configuration
515 # used for 'make defconfig'
516 include $(srctree)/arch/$(SRCARCH)/Makefile
517 export KBUILD_DEFCONFIG KBUILD_KCONFIG
519 config: scripts_basic outputmakefile FORCE
520 $(Q)mkdir -p include/linux include/config
521 $(Q)$(MAKE) $(build)=scripts/kconfig $@
523 %config: scripts_basic outputmakefile FORCE
524 $(Q)mkdir -p include/linux include/config
525 $(Q)$(MAKE) $(build)=scripts/kconfig $@
528 # ===========================================================================
529 # Build targets only - this includes vmlinux, arch specific targets, clean
530 # targets and others. In general all targets except *config targets.
532 ifeq ($(KBUILD_EXTMOD),)
533 # Additional helpers built in scripts/
534 # Carefully list dependencies so we do not try to build scripts twice
537 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
539 $(Q)$(MAKE) $(build)=$(@)
541 # Objects we will link into vmlinux / subdirs we need to visit
543 drivers-y := drivers/ sound/ firmware/
547 endif # KBUILD_EXTMOD
549 ifeq ($(dot-config),1)
551 -include include/config/auto.conf
553 ifeq ($(KBUILD_EXTMOD),)
554 # Read in dependencies to all Kconfig* files, make sure to run
555 # oldconfig if changes are detected.
556 -include include/config/auto.conf.cmd
558 # To avoid any implicit rule to kick in, define an empty command
559 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
561 # If .config is newer than include/config/auto.conf, someone tinkered
562 # with it and forgot to run make oldconfig.
563 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
564 # we execute the config step to be sure to catch updated Kconfig files
565 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
566 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
568 # external modules needs include/generated/autoconf.h and include/config/auto.conf
569 # but do not care if they are up-to-date. Use auto.conf to trigger the test
570 PHONY += include/config/auto.conf
572 include/config/auto.conf:
573 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
575 echo >&2 " ERROR: Kernel configuration is invalid."; \
576 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
577 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
581 endif # KBUILD_EXTMOD
584 # Dummy target needed, because used as prerequisite
585 include/config/auto.conf: ;
586 endif # $(dot-config)
588 # The all: target is the default when no target is given on the
590 # This allow a user to issue only 'make' to build a kernel including modules
591 # Defaults to vmlinux, but the arch makefile usually adds further targets
594 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
595 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
600 include $(srctree)/arch/$(SRCARCH)/Makefile
602 ifdef CONFIG_READABLE_ASM
603 # Disable optimizations that make assembler listings hard to read.
604 # reorder blocks reorders the control in the function
605 # ipa clone creates specialized cloned functions
606 # partial inlining inlines only parts of functions
607 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
608 $(call cc-option,-fno-ipa-cp-clone,) \
609 $(call cc-option,-fno-partial-inlining)
612 ifneq ($(CONFIG_FRAME_WARN),0)
613 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
616 # Force gcc to behave correct even for buggy distributions
617 ifndef CONFIG_CC_STACKPROTECTOR
618 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
621 # This warning generated too much noise in a regular build.
622 # Use make W=1 to enable this warning (see scripts/Makefile.build)
623 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
625 ifdef CONFIG_FRAME_POINTER
626 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
628 # Some targets (ARM with Thumb2, for example), can't be built with frame
629 # pointers. For those, we don't have FUNCTION_TRACER automatically
630 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
631 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
632 # -fomit-frame-pointer with FUNCTION_TRACER.
633 ifndef CONFIG_FUNCTION_TRACER
634 KBUILD_CFLAGS += -fomit-frame-pointer
638 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
640 ifdef CONFIG_DEBUG_INFO
642 KBUILD_AFLAGS += -gdwarf-2
645 ifdef CONFIG_DEBUG_INFO_REDUCED
646 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
647 $(call cc-option,-fno-var-tracking)
650 ifdef CONFIG_FUNCTION_TRACER
651 ifdef CONFIG_HAVE_FENTRY
652 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
654 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
655 KBUILD_AFLAGS += $(CC_USING_FENTRY)
656 ifdef CONFIG_DYNAMIC_FTRACE
657 ifdef CONFIG_HAVE_C_RECORDMCOUNT
658 BUILD_C_RECORDMCOUNT := y
659 export BUILD_C_RECORDMCOUNT
664 # We trigger additional mismatches with less inlining
665 ifdef CONFIG_DEBUG_SECTION_MISMATCH
666 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
669 # arch Makefile may override CC so keep this after arch Makefile is included
670 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
671 CHECKFLAGS += $(NOSTDINC_FLAGS)
673 # warn about C99 declaration after statement
674 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
676 # disable pointer signed / unsigned warnings in gcc 4.0
677 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
679 # disable invalid "can't wrap" optimizations for signed / pointers
680 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
682 # conserve stack if available
683 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
685 # use the deterministic mode of AR if available
686 KBUILD_ARFLAGS := $(call ar-option,D)
688 # check for 'asm goto'
689 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
690 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
693 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
694 KBUILD_CPPFLAGS += $(KCPPFLAGS)
695 KBUILD_AFLAGS += $(KAFLAGS)
696 KBUILD_CFLAGS += $(KCFLAGS)
698 # Use --build-id when available.
699 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
700 $(call cc-ldoption, -Wl$(comma)--build-id,))
701 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
702 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
704 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
705 LDFLAGS_vmlinux += $(call ld-option, -X,)
708 ifeq ($(CONFIG_PIE),y)
709 LDFLAGS_vmlinux += --just-symbols=pie/pie.syms
712 # Default kernel image to build when no specific target is given.
713 # KBUILD_IMAGE may be overruled on the command line or
714 # set in the environment
715 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
717 export KBUILD_IMAGE ?= vmlinux
720 # INSTALL_PATH specifies where to place the updated kernel and system map
721 # images. Default is /boot, but you can set it to other values
722 export INSTALL_PATH ?= /boot
725 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
726 # relocations required by build roots. This is not defined in the
727 # makefile but the argument can be passed to make if needed.
730 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
734 # INSTALL_MOD_STRIP, if defined, will cause modules to be
735 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
736 # the default option --strip-debug will be used. Otherwise,
737 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
739 ifdef INSTALL_MOD_STRIP
740 ifeq ($(INSTALL_MOD_STRIP),1)
741 mod_strip_cmd = $(STRIP) --strip-debug
743 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
744 endif # INSTALL_MOD_STRIP=1
747 endif # INSTALL_MOD_STRIP
751 ifdef CONFIG_MODULE_SIG_ALL
752 MODSECKEY = ./signing_key.priv
753 MODPUBKEY = ./signing_key.x509
755 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
762 ifeq ($(KBUILD_EXTMOD),)
763 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
765 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
766 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
767 $(net-y) $(net-m) $(libs-y) $(libs-m) $(libpie-y)))
769 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
771 $(core-n) $(core-) $(drivers-n) $(drivers-) \
772 $(net-n) $(net-) $(libs-n) $(libs-) $(libpie-))))
774 pie-$(CONFIG_PIE) := pie/
776 init-y := $(patsubst %/, %/built-in.o, $(init-y))
777 core-y := $(patsubst %/, %/built-in.o, $(core-y))
778 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
779 net-y := $(patsubst %/, %/built-in.o, $(net-y))
780 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
781 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
782 libs-y := $(libs-y1) $(libs-y2)
783 pie-y := $(patsubst %/, %/built-in.o, $(pie-y))
784 libpie-y := $(patsubst %/, %/built-in.o, $(libpie-y))
786 # Externally visible symbols (used by link-vmlinux.sh)
787 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
788 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
789 export KBUILD_VMLINUX_PIE := $(pie-y)
790 export KBUILD_LIBPIE := $(libpie-y)
791 export KBUILD_PIE_LDS := $(PIE_LDS)
792 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
793 export LDFLAGS_vmlinux
794 # used by scripts/pacmage/Makefile
795 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
797 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_PIE_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_PIE) $(KBUILD_LIBPIE)
799 # Final link of vmlinux
800 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
801 quiet_cmd_link-vmlinux = LINK $@
803 # Include targets which we want to
804 # execute if the rest of the kernel build went well.
805 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
806 ifdef CONFIG_HEADERS_CHECK
807 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
810 $(Q)$(MAKE) $(build)=samples
812 ifdef CONFIG_BUILD_DOCSRC
813 $(Q)$(MAKE) $(build)=Documentation
815 +$(call if_changed,link-vmlinux)
817 # The actual objects are generated when descending,
818 # make sure no implicit rule kicks in
819 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
821 # Handle descending into subdirectories listed in $(vmlinux-dirs)
822 # Preset locale variables to speed up the build process. Limit locale
823 # tweaks to this spot to avoid wrong language settings when running
824 # make menuconfig etc.
825 # Error messages still appears in the original language
827 PHONY += $(vmlinux-dirs)
828 $(vmlinux-dirs): prepare scripts
829 $(Q)$(MAKE) $(build)=$@
831 # Store (new) KERNELRELASE string in include/config/kernel.release
832 include/config/kernel.release: include/config/auto.conf FORCE
834 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
837 # Things we need to do before we recursively start building the kernel
838 # or the modules are listed in "prepare".
839 # A multi level approach is used. prepareN is processed before prepareN-1.
840 # archprepare is used in arch Makefiles and when processed asm symlink,
841 # version.h and scripts_basic is processed / created.
843 # Listed in dependency order
844 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
846 # prepare3 is used to check if we are building in a separate output directory,
848 # 1) Check that make has not been executed in the kernel src $(srctree)
849 prepare3: include/config/kernel.release
850 ifneq ($(KBUILD_SRC),)
851 @$(kecho) ' Using $(srctree) as source for kernel'
852 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
853 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
854 echo >&2 " in the '$(srctree)' directory.";\
859 # prepare2 creates a makefile if using a separate output directory
860 prepare2: prepare3 outputmakefile asm-generic
862 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
863 include/config/auto.conf
866 archprepare: archheaders archscripts prepare1 scripts_basic
868 prepare0: archprepare FORCE
869 $(Q)$(MAKE) $(build)=.
871 # All the preparing..
874 # Generate some files
875 # ---------------------------------------------------------------------------
877 # KERNELRELEASE can change from a few different places, meaning version.h
878 # needs to be updated, so this check is forced on all builds
881 define filechk_utsrelease.h
882 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
883 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
886 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
889 define filechk_version.h
890 (echo \#define LINUX_VERSION_CODE $(shell \
891 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
892 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
895 $(version_h): $(srctree)/Makefile FORCE
896 $(call filechk,version.h)
898 include/generated/utsrelease.h: include/config/kernel.release FORCE
899 $(call filechk,utsrelease.h)
903 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
904 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
906 # ---------------------------------------------------------------------------
910 @echo '*** Warning: make $@ is unnecessary now.'
912 # ---------------------------------------------------------------------------
914 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
915 export INSTALL_FW_PATH
917 PHONY += firmware_install
918 firmware_install: FORCE
919 @mkdir -p $(objtree)/firmware
920 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
922 # ---------------------------------------------------------------------------
925 #Default location for installed headers
926 export INSTALL_HDR_PATH = $(objtree)/usr
928 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
930 # If we do an all arch process set dst to asm-$(hdr-arch)
931 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
940 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
941 $(Q)$(MAKE) $(build)=scripts build_unifdef
943 PHONY += headers_install_all
945 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
947 PHONY += headers_install
948 headers_install: __headers
949 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
950 $(error Headers not exportable for the $(SRCARCH) architecture))
951 $(Q)$(MAKE) $(hdr-inst)=include/uapi
952 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
954 PHONY += headers_check_all
955 headers_check_all: headers_install_all
956 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
958 PHONY += headers_check
959 headers_check: headers_install
960 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
961 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
963 # ---------------------------------------------------------------------------
968 # By default, build modules as well
974 # A module can be listed more than once in obj-m resulting in
975 # duplicate lines in modules.order files. Those are removed
976 # using awk while concatenating to the final file.
979 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
980 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
981 @$(kecho) ' Building modules, stage 2.';
982 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
983 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
985 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
986 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
988 %/modules.builtin: include/config/auto.conf
989 $(Q)$(MAKE) $(modbuiltin)=$*
992 # Target to prepare building external modules
993 PHONY += modules_prepare
994 modules_prepare: prepare scripts
996 # Target to install modules
997 PHONY += modules_install
998 modules_install: _modinst_ _modinst_post
1002 @rm -rf $(MODLIB)/kernel
1003 @rm -f $(MODLIB)/source
1004 @mkdir -p $(MODLIB)/kernel
1005 @ln -s $(srctree) $(MODLIB)/source
1006 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1007 rm -f $(MODLIB)/build ; \
1008 ln -s $(objtree) $(MODLIB)/build ; \
1010 @cp -f $(objtree)/modules.order $(MODLIB)/
1011 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1012 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1014 # This depmod is only for convenience to give the initial
1015 # boot a modules.dep even before / is mounted read-write. However the
1016 # boot script depmod is the master version.
1017 PHONY += _modinst_post
1018 _modinst_post: _modinst_
1019 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1022 ifeq ($(CONFIG_MODULE_SIG), y)
1023 PHONY += modules_sign
1025 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1028 else # CONFIG_MODULES
1030 # Modules not configured
1031 # ---------------------------------------------------------------------------
1033 modules modules_install: FORCE
1035 @echo >&2 "The present kernel configuration has modules disabled."
1036 @echo >&2 "Type 'make config' and enable loadable module support."
1037 @echo >&2 "Then build a kernel with module support enabled."
1041 endif # CONFIG_MODULES
1044 # Cleaning is done on three levels.
1045 # make clean Delete most generated files
1046 # Leave enough to build external modules
1047 # make mrproper Delete the current configuration, and all generated files
1048 # make distclean Remove editor backup files, patch leftover files and the like
1050 # Directories & files removed with 'make clean'
1051 CLEAN_DIRS += $(MODVERDIR)
1053 # Directories & files removed with 'make mrproper'
1054 MRPROPER_DIRS += include/config usr/include include/generated \
1055 arch/*/include/generated
1056 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1057 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1058 signing_key.priv signing_key.x509 x509.genkey \
1059 extra_certificates signing_key.x509.keyid \
1060 signing_key.x509.signer
1062 # clean - Delete most, but leave enough to build external modules
1064 clean: rm-dirs := $(CLEAN_DIRS)
1065 clean: rm-files := $(CLEAN_FILES)
1066 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples pie)
1068 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1070 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1073 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1075 clean: archclean vmlinuxclean
1077 # mrproper - Delete all generated files, including .config
1079 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1080 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1081 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1083 PHONY += $(mrproper-dirs) mrproper archmrproper
1085 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1087 mrproper: clean archmrproper $(mrproper-dirs)
1096 @find $(srctree) $(RCS_FIND_IGNORE) \
1097 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1098 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1100 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1101 -type f -print | xargs rm -f
1104 # Packaging of the kernel to various formats
1105 # ---------------------------------------------------------------------------
1106 # rpm target kept for backward compatibility
1107 package-dir := $(srctree)/scripts/package
1110 $(Q)$(MAKE) $(build)=$(package-dir) $@
1111 %pkg: include/config/kernel.release FORCE
1112 $(Q)$(MAKE) $(build)=$(package-dir) $@
1113 rpm: include/config/kernel.release FORCE
1114 $(Q)$(MAKE) $(build)=$(package-dir) $@
1117 # Brief documentation of the typical targets used
1118 # ---------------------------------------------------------------------------
1120 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1121 boards := $(notdir $(boards))
1122 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1123 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1126 @echo 'Cleaning targets:'
1127 @echo ' clean - Remove most generated files but keep the config and'
1128 @echo ' enough build support to build external modules'
1129 @echo ' mrproper - Remove all generated files + config + various backup files'
1130 @echo ' distclean - mrproper + remove editor backup and patch files'
1132 @echo 'Configuration targets:'
1133 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1135 @echo 'Other generic targets:'
1136 @echo ' all - Build all targets marked with [*]'
1137 @echo '* vmlinux - Build the bare kernel'
1138 @echo '* modules - Build all modules'
1139 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1140 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1141 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1142 @echo ' dir/ - Build all files in dir and below'
1143 @echo ' dir/file.[oisS] - Build specified target only'
1144 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1145 @echo ' (requires a recent binutils and recent build (System.map))'
1146 @echo ' dir/file.ko - Build module including final link'
1147 @echo ' modules_prepare - Set up for building external modules'
1148 @echo ' tags/TAGS - Generate tags file for editors'
1149 @echo ' cscope - Generate cscope index'
1150 @echo ' gtags - Generate GNU GLOBAL index'
1151 @echo ' kernelrelease - Output the release version string'
1152 @echo ' kernelversion - Output the version stored in Makefile'
1153 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1154 echo ' (default: $(INSTALL_HDR_PATH))'; \
1156 @echo 'Static analysers'
1157 @echo ' checkstack - Generate a list of stack hogs'
1158 @echo ' namespacecheck - Name space analysis on compiled kernel'
1159 @echo ' versioncheck - Sanity check on version.h usage'
1160 @echo ' includecheck - Check for duplicate included header files'
1161 @echo ' export_report - List the usages of all exported symbols'
1162 @echo ' headers_check - Sanity check on exported headers'
1163 @echo ' headerdep - Detect inclusion cycles in headers'
1164 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1166 @echo 'Kernel packaging:'
1167 @$(MAKE) $(build)=$(package-dir) help
1169 @echo 'Documentation targets:'
1170 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1172 @echo 'Architecture specific targets ($(SRCARCH)):'
1173 @$(if $(archhelp),$(archhelp),\
1174 echo ' No architecture specific help defined for $(SRCARCH)')
1177 $(foreach b, $(boards), \
1178 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1180 @$(if $(board-dirs), \
1181 $(foreach b, $(board-dirs), \
1182 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1183 printf " %-16s - Show all of the above\\n" help-boards; \
1186 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1187 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1188 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1189 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1190 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1191 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1192 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1193 @echo ' 1: warnings which may be relevant and do not occur too often'
1194 @echo ' 2: warnings which occur quite often but may still be relevant'
1195 @echo ' 3: more obscure warnings, can most likely be ignored'
1196 @echo ' Multiple levels can be combined with W=12 or W=123'
1198 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1199 @echo 'For further info see the ./README file'
1202 help-board-dirs := $(addprefix help-,$(board-dirs))
1204 help-boards: $(help-board-dirs)
1206 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1208 $(help-board-dirs): help-%:
1209 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1210 @$(if $(boards-per-dir), \
1211 $(foreach b, $(boards-per-dir), \
1212 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1216 # Documentation targets
1217 # ---------------------------------------------------------------------------
1218 %docs: scripts_basic FORCE
1219 $(Q)$(MAKE) $(build)=scripts build_docproc
1220 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1222 else # KBUILD_EXTMOD
1225 # External module support.
1226 # When building external modules the kernel used as basis is considered
1227 # read-only, and no consistency checks are made and the make
1228 # system is not used on the basis kernel. If updates are required
1229 # in the basis kernel ordinary make commands (without M=...) must
1232 # The following are the only valid targets when building external
1234 # make M=dir clean Delete all automatically generated files
1235 # make M=dir modules Make all modules in specified dir
1236 # make M=dir Same as 'make M=dir modules'
1237 # make M=dir modules_install
1238 # Install the modules built in the module directory
1239 # Assumes install directory is already created
1241 # We are always building modules
1243 PHONY += crmodverdir
1247 PHONY += $(objtree)/Module.symvers
1248 $(objtree)/Module.symvers:
1249 @test -e $(objtree)/Module.symvers || ( \
1251 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1252 echo " is missing; modules will have no dependencies and modversions."; \
1255 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1256 PHONY += $(module-dirs) modules
1257 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1258 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1260 modules: $(module-dirs)
1261 @$(kecho) ' Building modules, stage 2.';
1262 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1264 PHONY += modules_install
1265 modules_install: _emodinst_ _emodinst_post
1267 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1270 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1271 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1273 PHONY += _emodinst_post
1274 _emodinst_post: _emodinst_
1277 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1279 PHONY += $(clean-dirs) clean
1281 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1283 clean: rm-dirs := $(MODVERDIR)
1284 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1287 @echo ' Building external modules.'
1288 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1290 @echo ' modules - default target, build the module(s)'
1291 @echo ' modules_install - install the module'
1292 @echo ' clean - remove generated files in module directory only'
1296 PHONY += prepare scripts
1299 endif # KBUILD_EXTMOD
1301 clean: $(clean-dirs)
1304 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1305 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1307 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1308 -o -name '*.symtypes' -o -name 'modules.order' \
1309 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1310 -o -name '*.gcno' \) -type f -print | xargs rm -f
1312 # Generate tags for editors
1313 # ---------------------------------------------------------------------------
1314 quiet_cmd_tags = GEN $@
1315 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1317 tags TAGS cscope gtags: FORCE
1320 # Scripts to check various things for consistency
1321 # ---------------------------------------------------------------------------
1323 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1326 find $(srctree)/* $(RCS_FIND_IGNORE) \
1327 -name '*.[hcS]' -type f -print | sort \
1328 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1331 find $(srctree)/* $(RCS_FIND_IGNORE) \
1332 -name '*.[hcS]' -type f -print | sort \
1333 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1336 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1339 $(PERL) $(srctree)/scripts/namespace.pl
1342 $(PERL) $(srctree)/scripts/export_report.pl
1344 endif #ifeq ($(config-targets),1)
1345 endif #ifeq ($(mixed-targets),1)
1347 PHONY += checkstack kernelrelease kernelversion
1349 # UML needs a little special treatment here. It wants to use the host
1350 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1351 # else wants $(ARCH), including people doing cross-builds, which means
1352 # that $(SUBARCH) doesn't work here.
1354 CHECKSTACK_ARCH := $(SUBARCH)
1356 CHECKSTACK_ARCH := $(ARCH)
1359 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1360 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1363 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1366 @echo $(KERNELVERSION)
1368 # Clear a bunch of variables before executing the submake
1370 $(Q)mkdir -p $(objtree)/tools
1371 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1374 $(Q)mkdir -p $(objtree)/tools
1375 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1378 # ---------------------------------------------------------------------------
1379 # Single targets are compatible with:
1380 # - build with mixed source and output
1381 # - build with separate output dir 'make O=...'
1382 # - external modules
1384 # target-dir => where to store outputfile
1385 # build-dir => directory in kernel source tree to use
1387 ifeq ($(KBUILD_EXTMOD),)
1388 build-dir = $(patsubst %/,%,$(dir $@))
1389 target-dir = $(dir $@)
1391 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1392 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1393 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1396 %.s: %.c prepare scripts FORCE
1397 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1398 %.i: %.c prepare scripts FORCE
1399 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1400 %.o: %.c prepare scripts FORCE
1401 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1402 %.lst: %.c prepare scripts FORCE
1403 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1404 %.s: %.S prepare scripts FORCE
1405 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1406 %.o: %.S prepare scripts FORCE
1407 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1408 %.symtypes: %.c prepare scripts FORCE
1409 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1412 /: prepare scripts FORCE
1414 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1415 $(build)=$(build-dir)
1416 %/: prepare scripts FORCE
1418 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1419 $(build)=$(build-dir)
1420 %.ko: prepare scripts FORCE
1422 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1423 $(build)=$(build-dir) $(@:.ko=.o)
1424 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1426 # FIXME Should go into a make.lib or something
1427 # ===========================================================================
1429 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1430 cmd_rmdirs = rm -rf $(rm-dirs)
1432 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1433 cmd_rmfiles = rm -f $(rm-files)
1435 # Run depmod only if we have System.map and depmod is executable
1436 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1437 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1438 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1440 # Create temporary dir for module support files
1441 # clean it up only when building all modules
1442 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1443 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1445 # read all saved command lines
1447 targets := $(wildcard $(sort $(targets)))
1448 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1450 ifneq ($(cmd_files),)
1451 $(cmd_files): ; # Do not try to update included dependency files
1452 include $(cmd_files)
1455 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1457 # $(Q)$(MAKE) $(clean)=dir
1458 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1460 endif # skip-makefile
1465 # Declare the contents of the .PHONY variable as phony. We keep that
1466 # information in a variable so we can use it in if_changed and friends.