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
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
396 KBUILD_AFLAGS_KERNEL :=
397 KBUILD_CFLAGS_KERNEL :=
398 KBUILD_AFLAGS := -D__ASSEMBLY__
399 KBUILD_AFLAGS_MODULE := -DMODULE
400 KBUILD_CFLAGS_MODULE := -DMODULE
401 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
403 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
404 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
405 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
407 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
408 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
409 export CPP AR NM STRIP OBJCOPY OBJDUMP
410 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
411 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
413 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
414 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
415 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
416 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
417 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
418 export KBUILD_ARFLAGS OBJCOPY_OUTPUT_FORMAT
420 # When compiling out-of-tree modules, put MODVERDIR in the module
421 # tree rather than in the kernel tree. The kernel tree might
423 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
425 # Files to ignore in find ... statements
427 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
428 -o -name .pc -o -name .hg -o -name .git \) -prune -o
429 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
430 --exclude CVS --exclude .pc --exclude .hg --exclude .git
432 # ===========================================================================
433 # Rules shared between *config targets and build targets
435 # Basic helpers built in scripts/
436 PHONY += scripts_basic
438 $(Q)$(MAKE) $(build)=scripts/basic
439 $(Q)rm -f .tmp_quiet_recordmcount
441 # To avoid any implicit rule to kick in, define an empty command.
442 scripts/basic/%: scripts_basic ;
444 PHONY += outputmakefile
445 # outputmakefile generates a Makefile in the output directory, if using a
446 # separate output directory. This allows convenient use of make in the
449 ifneq ($(KBUILD_SRC),)
450 $(Q)ln -fsn $(srctree) source
451 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
452 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
455 # Support for using generic headers in asm-generic
458 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
459 src=asm obj=arch/$(SRCARCH)/include/generated/asm
460 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
461 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
463 # To make sure we do not include .config for any of the *config targets
464 # catch them early, and hand them over to scripts/kconfig/Makefile
465 # It is allowed to specify more targets when calling make, including
466 # mixing *config targets and build targets.
467 # For example 'make oldconfig all'.
468 # Detect when mixed targets is specified, and make a second invocation
469 # of make so .config is not included in this case either (for *config).
471 version_h := include/generated/uapi/linux/version.h
473 no-dot-config-targets := clean mrproper distclean \
474 cscope gtags TAGS tags help %docs check% coccicheck \
475 $(version_h) headers_% archheaders archscripts \
476 kernelversion %src-pkg
482 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
483 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
488 ifeq ($(KBUILD_EXTMOD),)
489 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
491 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
497 ifeq ($(mixed-targets),1)
498 # ===========================================================================
499 # We're called with mixed targets (*config and build targets).
500 # Handle them one by one.
503 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
506 ifeq ($(config-targets),1)
507 # ===========================================================================
508 # *config targets only - make sure prerequisites are updated, and descend
509 # in scripts/kconfig to make the *config target
511 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
512 # KBUILD_DEFCONFIG may point out an alternative default configuration
513 # used for 'make defconfig'
514 include $(srctree)/arch/$(SRCARCH)/Makefile
515 export KBUILD_DEFCONFIG KBUILD_KCONFIG
517 config: scripts_basic outputmakefile FORCE
518 $(Q)mkdir -p include/linux include/config
519 $(Q)$(MAKE) $(build)=scripts/kconfig $@
521 %config: scripts_basic outputmakefile FORCE
522 $(Q)mkdir -p include/linux include/config
523 $(Q)$(MAKE) $(build)=scripts/kconfig $@
526 # ===========================================================================
527 # Build targets only - this includes vmlinux, arch specific targets, clean
528 # targets and others. In general all targets except *config targets.
530 ifeq ($(KBUILD_EXTMOD),)
531 # Additional helpers built in scripts/
532 # Carefully list dependencies so we do not try to build scripts twice
535 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
537 $(Q)$(MAKE) $(build)=$(@)
539 # Objects we will link into vmlinux / subdirs we need to visit
541 drivers-y := drivers/ sound/ firmware/
545 endif # KBUILD_EXTMOD
547 ifeq ($(dot-config),1)
549 -include include/config/auto.conf
551 ifeq ($(KBUILD_EXTMOD),)
552 # Read in dependencies to all Kconfig* files, make sure to run
553 # oldconfig if changes are detected.
554 -include include/config/auto.conf.cmd
556 # To avoid any implicit rule to kick in, define an empty command
557 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
559 # If .config is newer than include/config/auto.conf, someone tinkered
560 # with it and forgot to run make oldconfig.
561 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
562 # we execute the config step to be sure to catch updated Kconfig files
563 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
564 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
566 # external modules needs include/generated/autoconf.h and include/config/auto.conf
567 # but do not care if they are up-to-date. Use auto.conf to trigger the test
568 PHONY += include/config/auto.conf
570 include/config/auto.conf:
571 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
573 echo >&2 " ERROR: Kernel configuration is invalid."; \
574 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
575 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
579 endif # KBUILD_EXTMOD
582 # Dummy target needed, because used as prerequisite
583 include/config/auto.conf: ;
584 endif # $(dot-config)
586 # The all: target is the default when no target is given on the
588 # This allow a user to issue only 'make' to build a kernel including modules
589 # Defaults to vmlinux, but the arch makefile usually adds further targets
592 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
593 KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,)
598 include $(srctree)/arch/$(SRCARCH)/Makefile
600 ifdef CONFIG_READABLE_ASM
601 # Disable optimizations that make assembler listings hard to read.
602 # reorder blocks reorders the control in the function
603 # ipa clone creates specialized cloned functions
604 # partial inlining inlines only parts of functions
605 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
606 $(call cc-option,-fno-ipa-cp-clone,) \
607 $(call cc-option,-fno-partial-inlining)
610 ifneq ($(CONFIG_FRAME_WARN),0)
611 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
614 # Force gcc to behave correct even for buggy distributions
615 ifndef CONFIG_CC_STACKPROTECTOR
616 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
619 # This warning generated too much noise in a regular build.
620 # Use make W=1 to enable this warning (see scripts/Makefile.build)
621 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
623 ifdef CONFIG_FRAME_POINTER
624 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
626 # Some targets (ARM with Thumb2, for example), can't be built with frame
627 # pointers. For those, we don't have FUNCTION_TRACER automatically
628 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
629 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
630 # -fomit-frame-pointer with FUNCTION_TRACER.
631 ifndef CONFIG_FUNCTION_TRACER
632 KBUILD_CFLAGS += -fomit-frame-pointer
636 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
638 ifdef CONFIG_DEBUG_INFO
640 KBUILD_AFLAGS += -gdwarf-2
643 ifdef CONFIG_DEBUG_INFO_REDUCED
644 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
645 $(call cc-option,-fno-var-tracking)
648 ifdef CONFIG_FUNCTION_TRACER
649 ifdef CONFIG_HAVE_FENTRY
650 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
652 KBUILD_CFLAGS += -pg $(CC_USING_FENTRY)
653 KBUILD_AFLAGS += $(CC_USING_FENTRY)
654 ifdef CONFIG_DYNAMIC_FTRACE
655 ifdef CONFIG_HAVE_C_RECORDMCOUNT
656 BUILD_C_RECORDMCOUNT := y
657 export BUILD_C_RECORDMCOUNT
662 # We trigger additional mismatches with less inlining
663 ifdef CONFIG_DEBUG_SECTION_MISMATCH
664 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
667 # arch Makefile may override CC so keep this after arch Makefile is included
668 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
669 CHECKFLAGS += $(NOSTDINC_FLAGS)
671 # warn about C99 declaration after statement
672 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
674 # disable pointer signed / unsigned warnings in gcc 4.0
675 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
677 # disable invalid "can't wrap" optimizations for signed / pointers
678 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
680 # conserve stack if available
681 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
683 # use the deterministic mode of AR if available
684 KBUILD_ARFLAGS := $(call ar-option,D)
686 # check for 'asm goto'
687 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
688 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
691 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
692 KBUILD_CPPFLAGS += $(KCPPFLAGS)
693 KBUILD_AFLAGS += $(KAFLAGS)
694 KBUILD_CFLAGS += $(KCFLAGS)
696 # Use --build-id when available.
697 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
698 $(call cc-ldoption, -Wl$(comma)--build-id,))
699 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
700 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
702 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
703 LDFLAGS_vmlinux += $(call ld-option, -X,)
706 ifeq ($(CONFIG_PIE),y)
707 LDFLAGS_vmlinux += --just-symbols=pie/pie.syms
710 # Default kernel image to build when no specific target is given.
711 # KBUILD_IMAGE may be overruled on the command line or
712 # set in the environment
713 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
715 export KBUILD_IMAGE ?= vmlinux
718 # INSTALL_PATH specifies where to place the updated kernel and system map
719 # images. Default is /boot, but you can set it to other values
720 export INSTALL_PATH ?= /boot
723 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
724 # relocations required by build roots. This is not defined in the
725 # makefile but the argument can be passed to make if needed.
728 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
732 # INSTALL_MOD_STRIP, if defined, will cause modules to be
733 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
734 # the default option --strip-debug will be used. Otherwise,
735 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
737 ifdef INSTALL_MOD_STRIP
738 ifeq ($(INSTALL_MOD_STRIP),1)
739 mod_strip_cmd = $(STRIP) --strip-debug
741 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
742 endif # INSTALL_MOD_STRIP=1
745 endif # INSTALL_MOD_STRIP
749 ifdef CONFIG_MODULE_SIG_ALL
750 MODSECKEY = ./signing_key.priv
751 MODPUBKEY = ./signing_key.x509
753 mod_sign_cmd = perl $(srctree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODSECKEY) $(MODPUBKEY)
760 ifeq ($(KBUILD_EXTMOD),)
761 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
763 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
764 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
765 $(net-y) $(net-m) $(libs-y) $(libs-m) $(libpie-y)))
767 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
769 $(core-n) $(core-) $(drivers-n) $(drivers-) \
770 $(net-n) $(net-) $(libs-n) $(libs-) $(libpie-))))
772 pie-$(CONFIG_PIE) := pie/
774 init-y := $(patsubst %/, %/built-in.o, $(init-y))
775 core-y := $(patsubst %/, %/built-in.o, $(core-y))
776 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
777 net-y := $(patsubst %/, %/built-in.o, $(net-y))
778 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
779 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
780 libs-y := $(libs-y1) $(libs-y2)
781 pie-y := $(patsubst %/, %/built-in.o, $(pie-y))
782 libpie-y := $(patsubst %/, %/built-in.o, $(libpie-y))
784 # Externally visible symbols (used by link-vmlinux.sh)
785 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
786 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y) $(drivers-y) $(net-y)
787 export KBUILD_VMLINUX_PIE := $(pie-y)
788 export KBUILD_LIBPIE := $(libpie-y)
789 export KBUILD_PIE_LDS := $(PIE_LDS)
790 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
791 export LDFLAGS_vmlinux
792 # used by scripts/pacmage/Makefile
793 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools virt)
795 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_PIE_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_PIE) $(KBUILD_LIBPIE)
797 # Final link of vmlinux
798 cmd_link-vmlinux = $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
799 quiet_cmd_link-vmlinux = LINK $@
801 # Include targets which we want to
802 # execute if the rest of the kernel build went well.
803 vmlinux: scripts/link-vmlinux.sh $(vmlinux-deps) FORCE
804 ifdef CONFIG_HEADERS_CHECK
805 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
808 $(Q)$(MAKE) $(build)=samples
810 ifdef CONFIG_BUILD_DOCSRC
811 $(Q)$(MAKE) $(build)=Documentation
813 +$(call if_changed,link-vmlinux)
815 # The actual objects are generated when descending,
816 # make sure no implicit rule kicks in
817 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
819 # Handle descending into subdirectories listed in $(vmlinux-dirs)
820 # Preset locale variables to speed up the build process. Limit locale
821 # tweaks to this spot to avoid wrong language settings when running
822 # make menuconfig etc.
823 # Error messages still appears in the original language
825 PHONY += $(vmlinux-dirs)
826 $(vmlinux-dirs): prepare scripts
827 $(Q)$(MAKE) $(build)=$@
829 # Store (new) KERNELRELASE string in include/config/kernel.release
830 include/config/kernel.release: include/config/auto.conf FORCE
832 $(Q)echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" > $@
835 # Things we need to do before we recursively start building the kernel
836 # or the modules are listed in "prepare".
837 # A multi level approach is used. prepareN is processed before prepareN-1.
838 # archprepare is used in arch Makefiles and when processed asm symlink,
839 # version.h and scripts_basic is processed / created.
841 # Listed in dependency order
842 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
844 # prepare3 is used to check if we are building in a separate output directory,
846 # 1) Check that make has not been executed in the kernel src $(srctree)
847 prepare3: include/config/kernel.release
848 ifneq ($(KBUILD_SRC),)
849 @$(kecho) ' Using $(srctree) as source for kernel'
850 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
851 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
852 echo >&2 " in the '$(srctree)' directory.";\
857 # prepare2 creates a makefile if using a separate output directory
858 prepare2: prepare3 outputmakefile asm-generic
860 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
861 include/config/auto.conf
864 archprepare: archheaders archscripts prepare1 scripts_basic
866 prepare0: archprepare FORCE
867 $(Q)$(MAKE) $(build)=.
869 # All the preparing..
872 # Generate some files
873 # ---------------------------------------------------------------------------
875 # KERNELRELEASE can change from a few different places, meaning version.h
876 # needs to be updated, so this check is forced on all builds
879 define filechk_utsrelease.h
880 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
881 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
884 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
887 define filechk_version.h
888 (echo \#define LINUX_VERSION_CODE $(shell \
889 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
890 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
893 $(version_h): $(srctree)/Makefile FORCE
894 $(call filechk,version.h)
896 include/generated/utsrelease.h: include/config/kernel.release FORCE
897 $(call filechk,utsrelease.h)
901 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
902 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
904 # ---------------------------------------------------------------------------
908 @echo '*** Warning: make $@ is unnecessary now.'
910 # ---------------------------------------------------------------------------
912 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
913 export INSTALL_FW_PATH
915 PHONY += firmware_install
916 firmware_install: FORCE
917 @mkdir -p $(objtree)/firmware
918 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
920 # ---------------------------------------------------------------------------
923 #Default location for installed headers
924 export INSTALL_HDR_PATH = $(objtree)/usr
926 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
928 # If we do an all arch process set dst to asm-$(hdr-arch)
929 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
938 __headers: $(version_h) scripts_basic asm-generic archheaders archscripts FORCE
939 $(Q)$(MAKE) $(build)=scripts build_unifdef
941 PHONY += headers_install_all
943 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
945 PHONY += headers_install
946 headers_install: __headers
947 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/uapi/asm/Kbuild),, \
948 $(error Headers not exportable for the $(SRCARCH) architecture))
949 $(Q)$(MAKE) $(hdr-inst)=include/uapi
950 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst)
952 PHONY += headers_check_all
953 headers_check_all: headers_install_all
954 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
956 PHONY += headers_check
957 headers_check: headers_install
958 $(Q)$(MAKE) $(hdr-inst)=include/uapi HDRCHECK=1
959 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/uapi/asm $(hdr-dst) HDRCHECK=1
961 # ---------------------------------------------------------------------------
966 # By default, build modules as well
972 # A module can be listed more than once in obj-m resulting in
973 # duplicate lines in modules.order files. Those are removed
974 # using awk while concatenating to the final file.
977 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
978 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
979 @$(kecho) ' Building modules, stage 2.';
980 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
981 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
983 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
984 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
986 %/modules.builtin: include/config/auto.conf
987 $(Q)$(MAKE) $(modbuiltin)=$*
990 # Target to prepare building external modules
991 PHONY += modules_prepare
992 modules_prepare: prepare scripts
994 # Target to install modules
995 PHONY += modules_install
996 modules_install: _modinst_ _modinst_post
1000 @rm -rf $(MODLIB)/kernel
1001 @rm -f $(MODLIB)/source
1002 @mkdir -p $(MODLIB)/kernel
1003 @ln -s $(srctree) $(MODLIB)/source
1004 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1005 rm -f $(MODLIB)/build ; \
1006 ln -s $(objtree) $(MODLIB)/build ; \
1008 @cp -f $(objtree)/modules.order $(MODLIB)/
1009 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1010 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1012 # This depmod is only for convenience to give the initial
1013 # boot a modules.dep even before / is mounted read-write. However the
1014 # boot script depmod is the master version.
1015 PHONY += _modinst_post
1016 _modinst_post: _modinst_
1017 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1020 ifeq ($(CONFIG_MODULE_SIG), y)
1021 PHONY += modules_sign
1023 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1026 else # CONFIG_MODULES
1028 # Modules not configured
1029 # ---------------------------------------------------------------------------
1031 modules modules_install: FORCE
1033 @echo >&2 "The present kernel configuration has modules disabled."
1034 @echo >&2 "Type 'make config' and enable loadable module support."
1035 @echo >&2 "Then build a kernel with module support enabled."
1039 endif # CONFIG_MODULES
1042 # Cleaning is done on three levels.
1043 # make clean Delete most generated files
1044 # Leave enough to build external modules
1045 # make mrproper Delete the current configuration, and all generated files
1046 # make distclean Remove editor backup files, patch leftover files and the like
1048 # Directories & files removed with 'make clean'
1049 CLEAN_DIRS += $(MODVERDIR)
1051 # Directories & files removed with 'make mrproper'
1052 MRPROPER_DIRS += include/config usr/include include/generated \
1053 arch/*/include/generated
1054 MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \
1055 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1056 signing_key.priv signing_key.x509 x509.genkey \
1057 extra_certificates signing_key.x509.keyid \
1058 signing_key.x509.signer
1060 # clean - Delete most, but leave enough to build external modules
1062 clean: rm-dirs := $(CLEAN_DIRS)
1063 clean: rm-files := $(CLEAN_FILES)
1064 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples pie)
1066 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1068 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1071 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1073 clean: archclean vmlinuxclean
1075 # mrproper - Delete all generated files, including .config
1077 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1078 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1079 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1081 PHONY += $(mrproper-dirs) mrproper archmrproper
1083 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1085 mrproper: clean archmrproper $(mrproper-dirs)
1094 @find $(srctree) $(RCS_FIND_IGNORE) \
1095 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1096 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1098 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1099 -type f -print | xargs rm -f
1102 # Packaging of the kernel to various formats
1103 # ---------------------------------------------------------------------------
1104 # rpm target kept for backward compatibility
1105 package-dir := $(srctree)/scripts/package
1108 $(Q)$(MAKE) $(build)=$(package-dir) $@
1109 %pkg: include/config/kernel.release FORCE
1110 $(Q)$(MAKE) $(build)=$(package-dir) $@
1111 rpm: include/config/kernel.release FORCE
1112 $(Q)$(MAKE) $(build)=$(package-dir) $@
1115 # Brief documentation of the typical targets used
1116 # ---------------------------------------------------------------------------
1118 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1119 boards := $(notdir $(boards))
1120 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1121 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1124 @echo 'Cleaning targets:'
1125 @echo ' clean - Remove most generated files but keep the config and'
1126 @echo ' enough build support to build external modules'
1127 @echo ' mrproper - Remove all generated files + config + various backup files'
1128 @echo ' distclean - mrproper + remove editor backup and patch files'
1130 @echo 'Configuration targets:'
1131 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1133 @echo 'Other generic targets:'
1134 @echo ' all - Build all targets marked with [*]'
1135 @echo '* vmlinux - Build the bare kernel'
1136 @echo '* modules - Build all modules'
1137 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1138 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1139 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1140 @echo ' dir/ - Build all files in dir and below'
1141 @echo ' dir/file.[oisS] - Build specified target only'
1142 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1143 @echo ' (requires a recent binutils and recent build (System.map))'
1144 @echo ' dir/file.ko - Build module including final link'
1145 @echo ' modules_prepare - Set up for building external modules'
1146 @echo ' tags/TAGS - Generate tags file for editors'
1147 @echo ' cscope - Generate cscope index'
1148 @echo ' gtags - Generate GNU GLOBAL index'
1149 @echo ' kernelrelease - Output the release version string'
1150 @echo ' kernelversion - Output the version stored in Makefile'
1151 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1152 echo ' (default: $(INSTALL_HDR_PATH))'; \
1154 @echo 'Static analysers'
1155 @echo ' checkstack - Generate a list of stack hogs'
1156 @echo ' namespacecheck - Name space analysis on compiled kernel'
1157 @echo ' versioncheck - Sanity check on version.h usage'
1158 @echo ' includecheck - Check for duplicate included header files'
1159 @echo ' export_report - List the usages of all exported symbols'
1160 @echo ' headers_check - Sanity check on exported headers'
1161 @echo ' headerdep - Detect inclusion cycles in headers'
1162 @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
1164 @echo 'Kernel packaging:'
1165 @$(MAKE) $(build)=$(package-dir) help
1167 @echo 'Documentation targets:'
1168 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1170 @echo 'Architecture specific targets ($(SRCARCH)):'
1171 @$(if $(archhelp),$(archhelp),\
1172 echo ' No architecture specific help defined for $(SRCARCH)')
1175 $(foreach b, $(boards), \
1176 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1178 @$(if $(board-dirs), \
1179 $(foreach b, $(board-dirs), \
1180 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1181 printf " %-16s - Show all of the above\\n" help-boards; \
1184 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1185 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1186 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1187 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1188 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1189 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1190 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1191 @echo ' 1: warnings which may be relevant and do not occur too often'
1192 @echo ' 2: warnings which occur quite often but may still be relevant'
1193 @echo ' 3: more obscure warnings, can most likely be ignored'
1194 @echo ' Multiple levels can be combined with W=12 or W=123'
1196 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1197 @echo 'For further info see the ./README file'
1200 help-board-dirs := $(addprefix help-,$(board-dirs))
1202 help-boards: $(help-board-dirs)
1204 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1206 $(help-board-dirs): help-%:
1207 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1208 @$(if $(boards-per-dir), \
1209 $(foreach b, $(boards-per-dir), \
1210 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1214 # Documentation targets
1215 # ---------------------------------------------------------------------------
1216 %docs: scripts_basic FORCE
1217 $(Q)$(MAKE) $(build)=scripts build_docproc
1218 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1220 else # KBUILD_EXTMOD
1223 # External module support.
1224 # When building external modules the kernel used as basis is considered
1225 # read-only, and no consistency checks are made and the make
1226 # system is not used on the basis kernel. If updates are required
1227 # in the basis kernel ordinary make commands (without M=...) must
1230 # The following are the only valid targets when building external
1232 # make M=dir clean Delete all automatically generated files
1233 # make M=dir modules Make all modules in specified dir
1234 # make M=dir Same as 'make M=dir modules'
1235 # make M=dir modules_install
1236 # Install the modules built in the module directory
1237 # Assumes install directory is already created
1239 # We are always building modules
1241 PHONY += crmodverdir
1245 PHONY += $(objtree)/Module.symvers
1246 $(objtree)/Module.symvers:
1247 @test -e $(objtree)/Module.symvers || ( \
1249 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1250 echo " is missing; modules will have no dependencies and modversions."; \
1253 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1254 PHONY += $(module-dirs) modules
1255 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1256 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1258 modules: $(module-dirs)
1259 @$(kecho) ' Building modules, stage 2.';
1260 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1262 PHONY += modules_install
1263 modules_install: _emodinst_ _emodinst_post
1265 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1268 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1269 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1271 PHONY += _emodinst_post
1272 _emodinst_post: _emodinst_
1275 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1277 PHONY += $(clean-dirs) clean
1279 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1281 clean: rm-dirs := $(MODVERDIR)
1282 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1285 @echo ' Building external modules.'
1286 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1288 @echo ' modules - default target, build the module(s)'
1289 @echo ' modules_install - install the module'
1290 @echo ' clean - remove generated files in module directory only'
1294 PHONY += prepare scripts
1297 endif # KBUILD_EXTMOD
1299 clean: $(clean-dirs)
1302 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1303 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1305 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1306 -o -name '*.symtypes' -o -name 'modules.order' \
1307 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1308 -o -name '*.gcno' \) -type f -print | xargs rm -f
1310 # Generate tags for editors
1311 # ---------------------------------------------------------------------------
1312 quiet_cmd_tags = GEN $@
1313 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1315 tags TAGS cscope gtags: FORCE
1318 # Scripts to check various things for consistency
1319 # ---------------------------------------------------------------------------
1321 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1324 find $(srctree)/* $(RCS_FIND_IGNORE) \
1325 -name '*.[hcS]' -type f -print | sort \
1326 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1329 find $(srctree)/* $(RCS_FIND_IGNORE) \
1330 -name '*.[hcS]' -type f -print | sort \
1331 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1334 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1337 $(PERL) $(srctree)/scripts/namespace.pl
1340 $(PERL) $(srctree)/scripts/export_report.pl
1342 endif #ifeq ($(config-targets),1)
1343 endif #ifeq ($(mixed-targets),1)
1345 PHONY += checkstack kernelrelease kernelversion
1347 # UML needs a little special treatment here. It wants to use the host
1348 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1349 # else wants $(ARCH), including people doing cross-builds, which means
1350 # that $(SUBARCH) doesn't work here.
1352 CHECKSTACK_ARCH := $(SUBARCH)
1354 CHECKSTACK_ARCH := $(ARCH)
1357 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1358 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1361 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1364 @echo $(KERNELVERSION)
1366 # Clear a bunch of variables before executing the submake
1368 $(Q)mkdir -p $(objtree)/tools
1369 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/
1372 $(Q)mkdir -p $(objtree)/tools
1373 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(filter --j% -j,$(MAKEFLAGS))" O=$(objtree) subdir=tools -C $(src)/tools/ $*
1376 # ---------------------------------------------------------------------------
1377 # Single targets are compatible with:
1378 # - build with mixed source and output
1379 # - build with separate output dir 'make O=...'
1380 # - external modules
1382 # target-dir => where to store outputfile
1383 # build-dir => directory in kernel source tree to use
1385 ifeq ($(KBUILD_EXTMOD),)
1386 build-dir = $(patsubst %/,%,$(dir $@))
1387 target-dir = $(dir $@)
1389 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1390 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1391 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1394 %.s: %.c prepare scripts FORCE
1395 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1396 %.i: %.c prepare scripts FORCE
1397 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1398 %.o: %.c prepare scripts FORCE
1399 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1400 %.lst: %.c prepare scripts FORCE
1401 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1402 %.s: %.S prepare scripts FORCE
1403 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1404 %.o: %.S prepare scripts FORCE
1405 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1406 %.symtypes: %.c prepare scripts FORCE
1407 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1410 /: prepare scripts FORCE
1412 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1413 $(build)=$(build-dir)
1414 %/: prepare scripts FORCE
1416 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1417 $(build)=$(build-dir)
1418 %.ko: prepare scripts FORCE
1420 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1421 $(build)=$(build-dir) $(@:.ko=.o)
1422 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1424 # FIXME Should go into a make.lib or something
1425 # ===========================================================================
1427 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1428 cmd_rmdirs = rm -rf $(rm-dirs)
1430 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1431 cmd_rmfiles = rm -f $(rm-files)
1433 # Run depmod only if we have System.map and depmod is executable
1434 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1435 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1436 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1438 # Create temporary dir for module support files
1439 # clean it up only when building all modules
1440 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1441 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1443 # read all saved command lines
1445 targets := $(wildcard $(sort $(targets)))
1446 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1448 ifneq ($(cmd_files),)
1449 $(cmd_files): ; # Do not try to update included dependency files
1450 include $(cmd_files)
1453 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1455 # $(Q)$(MAKE) $(clean)=dir
1456 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1458 endif # skip-makefile
1463 # Declare the contents of the .PHONY variable as phony. We keep that
1464 # information in a variable so we can use it in if_changed and friends.