1 # SPDX-License-Identifier: GPL-2.0
6 NAME = Kleptomaniac Octopus
9 # To see a list of typical targets execute "make help"
10 # More info can be located in ./README
11 # Comments in this file are targeted only to the developer, do not
12 # expect to learn how to build the kernel reading this file.
14 $(if $(filter __%, $(MAKECMDGOALS)), \
15 $(error targets prefixed with '__' are only for internal use))
17 # That's our default target when none is given on the command line
21 # We are using a recursive build, so we need to do a little thinking
22 # to get the ordering right.
24 # Most importantly: sub-Makefiles should only ever modify files in
25 # their own directory. If in some directory we have a dependency on
26 # a file in another dir (which doesn't happen often, but it's often
27 # unavoidable when linking the built-in.a targets which finally
28 # turn into vmlinux), we will call a sub make in that other dir, and
29 # after that we are sure that everything which is in that other dir
32 # The only cases where we need to modify files which have global
33 # effects are thus separated out and done before the recursive
34 # descending is started. They are now explicitly listed as the
37 ifneq ($(sub_make_done),1)
39 # Do not use make's built-in rules and variables
40 # (this increases performance and avoids hard-to-debug behaviour)
43 # Avoid funny character set dependencies
47 export LC_COLLATE LC_NUMERIC
49 # Avoid interference with shell env settings
53 # ---------------------------------------------------------------------------
55 # Normally, we echo the whole command before executing it. By making
56 # that echo $($(quiet)$(cmd)), we now have the possibility to set
57 # $(quiet) to choose other forms of output instead, e.g.
59 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
60 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
62 # If $(quiet) is empty, the whole command will be printed.
63 # If it is set to "quiet_", only the short version will be printed.
64 # If it is set to "silent_", nothing will be printed at all, since
65 # the variable $(silent_cmd_cc_o_c) doesn't exist.
67 # A simple variant is to prefix commands with $(Q) - that's useful
68 # for commands that shall be hidden in non-verbose mode.
72 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
73 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
74 # If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt.
76 # To put more focus on warnings, be less verbose as default
77 # Use 'make V=1' to see the full commands
79 ifeq ("$(origin V)", "command line")
86 ifeq ($(KBUILD_VERBOSE),1)
94 # If the user is running make -s (silent mode), suppress echoing of
97 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
101 export quiet Q KBUILD_VERBOSE
103 # Kbuild will save output files in the current working directory.
104 # This does not need to match to the root of the kernel source tree.
106 # For example, you can do this:
108 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
110 # If you want to save output files in a different location, there are
111 # two syntaxes to specify it.
114 # Use "make O=dir/to/store/output/files/"
116 # 2) Set KBUILD_OUTPUT
117 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
118 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
120 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
123 # Do we want to change the working directory?
124 ifeq ("$(origin O)", "command line")
125 KBUILD_OUTPUT := $(O)
128 ifneq ($(KBUILD_OUTPUT),)
129 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
130 # expand a shell special character '~'. We use a somewhat tedious way here.
131 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
132 $(if $(abs_objtree),, \
133 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
135 # $(realpath ...) resolves symlinks
136 abs_objtree := $(realpath $(abs_objtree))
138 abs_objtree := $(CURDIR)
139 endif # ifneq ($(KBUILD_OUTPUT),)
141 ifeq ($(abs_objtree),$(CURDIR))
142 # Suppress "Entering directory ..." unless we are changing the work directory.
143 MAKEFLAGS += --no-print-directory
148 abs_srctree := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
150 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
151 $(error source directory cannot contain spaces or colons)
154 ifneq ($(abs_srctree),$(abs_objtree))
155 # Look for make include files relative to root of kernel src
157 # This does not become effective immediately because MAKEFLAGS is re-parsed
158 # once after the Makefile is read. We need to invoke sub-make.
159 MAKEFLAGS += --include-dir=$(abs_srctree)
163 this-makefile := $(lastword $(MAKEFILE_LIST))
165 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
166 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
167 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
169 # Cancel implicit rules for this Makefile.
173 export abs_srctree abs_objtree
174 export sub_make_done := 1
176 ifeq ($(need-sub-make),1)
178 PHONY += $(MAKECMDGOALS) __sub-make
180 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
183 # Invoke a second make in the output directory, passing relevant variables
185 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
187 endif # need-sub-make
188 endif # sub_make_done
190 # We process the rest of the Makefile if this is the final invocation of make
191 ifeq ($(need-sub-make),)
193 # Do not print "Entering directory ...",
194 # but we want to display it when entering to the output directory
195 # so that IDEs/editors are able to understand relative filenames.
196 MAKEFLAGS += --no-print-directory
198 # Call a source code checker (by default, "sparse") as part of the
201 # Use 'make C=1' to enable checking of only re-compiled files.
202 # Use 'make C=2' to enable checking of *all* source files, regardless
203 # of whether they are re-compiled or not.
205 # See the file "Documentation/dev-tools/sparse.rst" for more details,
206 # including where to get the "sparse" utility.
208 ifeq ("$(origin C)", "command line")
209 KBUILD_CHECKSRC = $(C)
211 ifndef KBUILD_CHECKSRC
215 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
216 # directory of external module to build. Setting M= takes precedence.
217 ifeq ("$(origin M)", "command line")
218 KBUILD_EXTMOD := $(M)
221 $(if $(word 2, $(KBUILD_EXTMOD)), \
222 $(error building multiple external modules is not supported))
224 export KBUILD_CHECKSRC KBUILD_EXTMOD
226 extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
228 ifeq ($(abs_srctree),$(abs_objtree))
229 # building in the source tree
231 building_out_of_srctree :=
233 ifeq ($(abs_srctree)/,$(dir $(abs_objtree)))
234 # building in a subdirectory of the source tree
237 srctree := $(abs_srctree)
239 building_out_of_srctree := 1
242 ifneq ($(KBUILD_ABS_SRCTREE),)
243 srctree := $(abs_srctree)
249 export building_out_of_srctree srctree objtree VPATH
251 # To make sure we do not include .config for any of the *config targets
252 # catch them early, and hand them over to scripts/kconfig/Makefile
253 # It is allowed to specify more targets when calling make, including
254 # mixing *config targets and build targets.
255 # For example 'make oldconfig all'.
256 # Detect when mixed targets is specified, and make a second invocation
257 # of make so .config is not included in this case either (for *config).
259 version_h := include/generated/uapi/linux/version.h
260 old_version_h := include/linux/version.h
262 clean-targets := %clean mrproper cleandocs
263 no-dot-config-targets := $(clean-targets) \
264 cscope gtags TAGS tags help% %docs check% coccicheck \
265 $(version_h) headers headers_% archheaders archscripts \
266 %asm-generic kernelversion %src-pkg dt_binding_check \
268 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease
269 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
277 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
278 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
283 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
284 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
289 ifneq ($(KBUILD_EXTMOD),)
293 ifeq ($(KBUILD_EXTMOD),)
294 ifneq ($(filter %config,$(MAKECMDGOALS)),)
296 ifneq ($(words $(MAKECMDGOALS)),1)
302 # We cannot build single targets and the others at the same time
303 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
305 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
310 # For "make -j clean all", "make -j mrproper defconfig all", etc.
311 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
312 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
317 # install and modules_install need also be processed one by one
318 ifneq ($(filter install,$(MAKECMDGOALS)),)
319 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
325 # ===========================================================================
326 # We're called with mixed targets (*config and build targets).
327 # Handle them one by one.
329 PHONY += $(MAKECMDGOALS) __build_one_by_one
331 $(MAKECMDGOALS): __build_one_by_one
336 for i in $(MAKECMDGOALS); do \
337 $(MAKE) -f $(srctree)/Makefile $$i; \
342 include scripts/Kbuild.include
344 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
345 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
346 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
347 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
349 include scripts/subarch.include
351 # Cross compiling and selecting different set of gcc/bin-utils
352 # ---------------------------------------------------------------------------
354 # When performing cross compilation for other architectures ARCH shall be set
355 # to the target architecture. (See arch/* for the possibilities).
356 # ARCH can be set during invocation of make:
358 # Another way is to have ARCH set in the environment.
359 # The default ARCH is the host where make is executed.
361 # CROSS_COMPILE specify the prefix used for all executables used
362 # during compilation. Only gcc and related bin-utils executables
363 # are prefixed with $(CROSS_COMPILE).
364 # CROSS_COMPILE can be set on the command line
365 # make CROSS_COMPILE=ia64-linux-
366 # Alternatively CROSS_COMPILE can be set in the environment.
367 # Default value for CROSS_COMPILE is not to prefix executables
368 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
371 # Architecture as present in compile.h
372 UTS_MACHINE := $(ARCH)
375 # Additional ARCH settings for x86
379 ifeq ($(ARCH),x86_64)
383 # Additional ARCH settings for sparc
384 ifeq ($(ARCH),sparc32)
387 ifeq ($(ARCH),sparc64)
391 # Additional ARCH settings for sh
396 KCONFIG_CONFIG ?= .config
397 export KCONFIG_CONFIG
399 # Default file for 'make defconfig'. This may be overridden by arch-Makefile.
400 export KBUILD_DEFCONFIG := defconfig
402 # SHELL used by kbuild
405 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
406 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
407 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
417 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
418 -O2 -fomit-frame-pointer -std=gnu89
419 export KBUILD_USERLDFLAGS :=
421 KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
422 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
423 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
424 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
426 # Make variables (CC, etc...)
433 OBJCOPY = llvm-objcopy
434 OBJDUMP = llvm-objdump
435 READELF = llvm-readelf
438 CC = $(CROSS_COMPILE)gcc
439 LD = $(CROSS_COMPILE)ld
440 AR = $(CROSS_COMPILE)ar
441 NM = $(CROSS_COMPILE)nm
442 OBJCOPY = $(CROSS_COMPILE)objcopy
443 OBJDUMP = $(CROSS_COMPILE)objdump
444 READELF = $(CROSS_COMPILE)readelf
445 STRIP = $(CROSS_COMPILE)strip
448 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
452 INSTALLKERNEL := installkernel
466 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
467 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
476 # Use USERINCLUDE when you must reference the UAPI directories only.
478 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
479 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
480 -I$(srctree)/include/uapi \
481 -I$(objtree)/include/generated/uapi \
482 -include $(srctree)/include/linux/kconfig.h
484 # Use LINUXINCLUDE when you must reference the include/ directory.
485 # Needed to be compatible with the O= option
487 -I$(srctree)/arch/$(SRCARCH)/include \
488 -I$(objtree)/arch/$(SRCARCH)/include/generated \
489 $(if $(building_out_of_srctree),-I$(srctree)/include) \
490 -I$(objtree)/include \
493 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
494 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
495 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
496 -Werror=implicit-function-declaration -Werror=implicit-int \
497 -Werror=return-type -Wno-format-security \
499 KBUILD_CPPFLAGS := -D__KERNEL__
500 KBUILD_AFLAGS_KERNEL :=
501 KBUILD_CFLAGS_KERNEL :=
502 KBUILD_AFLAGS_MODULE := -DMODULE
503 KBUILD_CFLAGS_MODULE := -DMODULE
504 KBUILD_LDFLAGS_MODULE :=
508 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
509 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
510 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
511 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
512 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
514 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
515 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
516 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
517 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
518 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
520 # Files to ignore in find ... statements
522 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
523 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
525 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
526 --exclude CVS --exclude .pc --exclude .hg --exclude .git
528 # ===========================================================================
529 # Rules shared between *config targets and build targets
531 # Basic helpers built in scripts/basic/
532 PHONY += scripts_basic
534 $(Q)$(MAKE) $(build)=scripts/basic
535 $(Q)rm -f .tmp_quiet_recordmcount
537 PHONY += outputmakefile
538 # Before starting out-of-tree build, make sure the source tree is clean.
539 # outputmakefile generates a Makefile in the output directory, if using a
540 # separate output directory. This allows convenient use of make in the
542 # At the same time when output Makefile generated, generate .gitignore to
543 # ignore whole output directory
545 ifdef building_out_of_srctree
546 $(Q)if [ -f $(srctree)/.config -o \
547 -d $(srctree)/include/config -o \
548 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
550 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
551 echo >&2 "*** in $(abs_srctree)";\
555 $(Q)ln -fsn $(srctree) source
556 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
557 $(Q)test -e .gitignore || \
558 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
561 ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
562 ifneq ($(CROSS_COMPILE),)
563 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
564 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
565 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
566 GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
568 ifneq ($(GCC_TOOLCHAIN),)
569 CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
571 ifneq ($(LLVM_IAS),1)
572 CLANG_FLAGS += -no-integrated-as
574 CLANG_FLAGS += -Werror=unknown-warning-option
575 KBUILD_CFLAGS += $(CLANG_FLAGS)
576 KBUILD_AFLAGS += $(CLANG_FLAGS)
580 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
581 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
582 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
583 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
584 CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
587 # ===========================================================================
588 # *config targets only - make sure prerequisites are updated, and descend
589 # in scripts/kconfig to make the *config target
591 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
592 # KBUILD_DEFCONFIG may point out an alternative default configuration
593 # used for 'make defconfig'
594 include arch/$(SRCARCH)/Makefile
595 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
597 config: outputmakefile scripts_basic FORCE
598 $(Q)$(MAKE) $(build)=scripts/kconfig $@
600 %config: outputmakefile scripts_basic FORCE
601 $(Q)$(MAKE) $(build)=scripts/kconfig $@
604 # ===========================================================================
605 # Build targets only - this includes vmlinux, arch specific targets, clean
606 # targets and others. In general all targets except *config targets.
608 # If building an external module we do not care about the all: rule
609 # but instead __all depend on modules
611 ifeq ($(KBUILD_EXTMOD),)
617 # Decide whether to build built-in, modular, or both.
618 # Normally, just do built-in.
623 # If we have only "make modules", don't compile built-in objects.
624 ifeq ($(MAKECMDGOALS),modules)
628 # If we have "make <whatever> modules", compile modules
629 # in addition to whatever we do anyway.
630 # Just "make" or "make all" shall build modules as well
632 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
636 ifeq ($(MAKECMDGOALS),)
640 export KBUILD_MODULES KBUILD_BUILTIN
643 include include/config/auto.conf
646 ifeq ($(KBUILD_EXTMOD),)
647 # Objects we will link into vmlinux / subdirs we need to visit
649 drivers-y := drivers/ sound/
650 drivers-$(CONFIG_SAMPLES) += samples/
651 drivers-y += net/ virt/
653 endif # KBUILD_EXTMOD
655 # The all: target is the default when no target is given on the
657 # This allow a user to issue only 'make' to build a kernel including modules
658 # Defaults to vmlinux, but the arch makefile usually adds further targets
661 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
662 $(call cc-option,-fno-tree-loop-im) \
663 $(call cc-disable-warning,maybe-uninitialized,)
666 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
667 ifdef CONFIG_FUNCTION_TRACER
668 CC_FLAGS_FTRACE := -pg
671 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
672 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
673 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
674 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
675 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
676 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
677 export RETPOLINE_CFLAGS
678 export RETPOLINE_VDSO_CFLAGS
680 include arch/$(SRCARCH)/Makefile
683 ifdef may-sync-config
684 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
685 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
686 # because some architectures define CROSS_COMPILE there.
687 include include/config/auto.conf.cmd
691 @echo >&2 '*** Configuration file "$@" not found!'
693 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
694 @echo >&2 '*** "make menuconfig" or "make xconfig").'
698 # The actual configuration files used during the build are stored in
699 # include/generated/ and include/config/. Update them if .config is newer than
700 # include/config/auto.conf (which mirrors .config).
702 # This exploits the 'multi-target pattern rule' trick.
703 # The syncconfig should be executed only once to make all the targets.
704 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
705 quiet_cmd_syncconfig = SYNC $@
706 cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig
708 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
709 +$(call cmd,syncconfig)
710 else # !may-sync-config
711 # External modules and some install targets need include/generated/autoconf.h
712 # and include/config/auto.conf but do not care if they are up-to-date.
713 # Use auto.conf to trigger the test
714 PHONY += include/config/auto.conf
716 include/config/auto.conf:
717 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
719 echo >&2 " ERROR: Kernel configuration is invalid."; \
720 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
721 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
725 endif # may-sync-config
728 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
729 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
730 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
731 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
732 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
734 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
736 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
738 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
742 # Tell gcc to never replace conditional load with a non-conditional one
743 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
744 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
746 ifdef CONFIG_READABLE_ASM
747 # Disable optimizations that make assembler listings hard to read.
748 # reorder blocks reorders the control in the function
749 # ipa clone creates specialized cloned functions
750 # partial inlining inlines only parts of functions
751 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
752 $(call cc-option,-fno-ipa-cp-clone,) \
753 $(call cc-option,-fno-partial-inlining)
756 ifneq ($(CONFIG_FRAME_WARN),0)
757 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
760 stackp-flags-y := -fno-stack-protector
761 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
762 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
764 KBUILD_CFLAGS += $(stackp-flags-y)
766 ifdef CONFIG_CC_IS_CLANG
767 KBUILD_CPPFLAGS += -Qunused-arguments
768 KBUILD_CFLAGS += -Wno-format-invalid-specifier
769 KBUILD_CFLAGS += -Wno-gnu
770 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
771 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
772 # See modpost pattern 2
773 KBUILD_CFLAGS += -mno-global-merge
776 # These warnings generated too much noise in a regular build.
777 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
778 KBUILD_CFLAGS += -Wno-unused-but-set-variable
780 # Warn about unmarked fall-throughs in switch statement.
781 # Disabled for clang while comment to attribute conversion happens and
782 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
783 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
786 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
787 ifdef CONFIG_FRAME_POINTER
788 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
790 # Some targets (ARM with Thumb2, for example), can't be built with frame
791 # pointers. For those, we don't have FUNCTION_TRACER automatically
792 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
793 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
794 # -fomit-frame-pointer with FUNCTION_TRACER.
795 ifndef CONFIG_FUNCTION_TRACER
796 KBUILD_CFLAGS += -fomit-frame-pointer
800 # Initialize all stack variables with a 0xAA pattern.
801 ifdef CONFIG_INIT_STACK_ALL_PATTERN
802 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
805 # Initialize all stack variables with a zero value.
806 ifdef CONFIG_INIT_STACK_ALL_ZERO
807 # Future support for zero initialization is still being debated, see
808 # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
809 # renamed or dropped.
810 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
811 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
816 # Workaround for GCC versions < 5.0
817 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
818 ifdef CONFIG_CC_IS_GCC
819 DEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
822 ifdef CONFIG_DEBUG_INFO
824 ifdef CONFIG_DEBUG_INFO_SPLIT
825 DEBUG_CFLAGS += -gsplit-dwarf
830 ifneq ($(LLVM_IAS),1)
831 KBUILD_AFLAGS += -Wa,-gdwarf-2
834 ifdef CONFIG_DEBUG_INFO_DWARF4
835 DEBUG_CFLAGS += -gdwarf-4
838 ifdef CONFIG_DEBUG_INFO_REDUCED
839 DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
840 $(call cc-option,-fno-var-tracking)
843 ifdef CONFIG_DEBUG_INFO_COMPRESSED
844 DEBUG_CFLAGS += -gz=zlib
845 KBUILD_AFLAGS += -gz=zlib
846 KBUILD_LDFLAGS += --compress-debug-sections=zlib
849 endif # CONFIG_DEBUG_INFO
851 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
854 ifdef CONFIG_FUNCTION_TRACER
855 ifdef CONFIG_FTRACE_MCOUNT_RECORD
856 # gcc 5 supports generating the mcount tables directly
857 ifeq ($(call cc-option-yn,-mrecord-mcount),y)
858 CC_FLAGS_FTRACE += -mrecord-mcount
859 export CC_USING_RECORD_MCOUNT := 1
861 ifdef CONFIG_HAVE_NOP_MCOUNT
862 ifeq ($(call cc-option-yn, -mnop-mcount),y)
863 CC_FLAGS_FTRACE += -mnop-mcount
864 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
868 ifdef CONFIG_HAVE_FENTRY
869 ifeq ($(call cc-option-yn, -mfentry),y)
870 CC_FLAGS_FTRACE += -mfentry
871 CC_FLAGS_USING += -DCC_USING_FENTRY
874 export CC_FLAGS_FTRACE
875 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
876 KBUILD_AFLAGS += $(CC_FLAGS_USING)
877 ifdef CONFIG_DYNAMIC_FTRACE
878 ifdef CONFIG_HAVE_C_RECORDMCOUNT
879 BUILD_C_RECORDMCOUNT := y
880 export BUILD_C_RECORDMCOUNT
885 # We trigger additional mismatches with less inlining
886 ifdef CONFIG_DEBUG_SECTION_MISMATCH
887 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
890 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
891 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
892 LDFLAGS_vmlinux += --gc-sections
895 ifdef CONFIG_SHADOW_CALL_STACK
896 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
897 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
901 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
902 KBUILD_CFLAGS += -falign-functions=32
905 # arch Makefile may override CC so keep this after arch Makefile is included
906 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
908 # warn about C99 declaration after statement
909 KBUILD_CFLAGS += -Wdeclaration-after-statement
911 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
912 KBUILD_CFLAGS += -Wvla
914 # disable pointer signed / unsigned warnings in gcc 4.0
915 KBUILD_CFLAGS += -Wno-pointer-sign
917 # disable stringop warnings in gcc 8+
918 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
920 # We'll want to enable this eventually, but it's not going away for 5.7 at least
921 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
922 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
923 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
925 # Another good warning that we'll want to enable eventually
926 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
928 # Enabled with W=2, disabled by default as noisy
929 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
931 # disable invalid "can't wrap" optimizations for signed / pointers
932 KBUILD_CFLAGS += -fno-strict-overflow
934 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
935 KBUILD_CFLAGS += -fno-stack-check
937 # conserve stack if available
938 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
940 # Prohibit date/time macros, which would make the build non-deterministic
941 KBUILD_CFLAGS += -Werror=date-time
943 # enforce correct pointer usage
944 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
946 # Require designated initializers for all marked structures
947 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
949 # change __FILE__ to the relative path from the srctree
950 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
952 # include additional Makefiles when needed
953 include-y := scripts/Makefile.extrawarn
954 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
955 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
956 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
957 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
958 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
960 include $(addprefix $(srctree)/, $(include-y))
962 # scripts/Makefile.gcc-plugins is intentionally included last.
963 # Do not add $(call cc-option,...) below this line. When you build the kernel
964 # from the clean source tree, the GCC plugins do not exist at this point.
966 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
967 KBUILD_CPPFLAGS += $(KCPPFLAGS)
968 KBUILD_AFLAGS += $(KAFLAGS)
969 KBUILD_CFLAGS += $(KCFLAGS)
971 KBUILD_LDFLAGS_MODULE += --build-id=sha1
972 LDFLAGS_vmlinux += --build-id=sha1
974 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
975 LDFLAGS_vmlinux += $(call ld-option, -X,)
978 ifeq ($(CONFIG_RELR),y)
979 LDFLAGS_vmlinux += --pack-dyn-relocs=relr
982 # We never want expected sections to be placed heuristically by the
983 # linker. All sections should be explicitly named in the linker script.
984 ifdef CONFIG_LD_ORPHAN_WARN
985 LDFLAGS_vmlinux += --orphan-handling=warn
988 # Align the bit size of userspace programs with the kernel
989 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
990 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
992 # make the checker run with the right architecture
993 CHECKFLAGS += --arch=$(ARCH)
995 # insure the checker run with the right endianness
996 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
998 # the checker needs the correct machine size
999 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1001 # Default kernel image to build when no specific target is given.
1002 # KBUILD_IMAGE may be overruled on the command line or
1003 # set in the environment
1004 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1005 # this default value
1006 export KBUILD_IMAGE ?= vmlinux
1009 # INSTALL_PATH specifies where to place the updated kernel and system map
1010 # images. Default is /boot, but you can set it to other values
1011 export INSTALL_PATH ?= /boot
1014 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1015 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1016 # an argument if needed. Otherwise it defaults to the kernel install path
1018 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1021 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1022 # relocations required by build roots. This is not defined in the
1023 # makefile but the argument can be passed to make if needed.
1026 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1030 # INSTALL_MOD_STRIP, if defined, will cause modules to be
1031 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
1032 # the default option --strip-debug will be used. Otherwise,
1033 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
1035 ifdef INSTALL_MOD_STRIP
1036 ifeq ($(INSTALL_MOD_STRIP),1)
1037 mod_strip_cmd = $(STRIP) --strip-debug
1039 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
1040 endif # INSTALL_MOD_STRIP=1
1042 mod_strip_cmd = true
1043 endif # INSTALL_MOD_STRIP
1044 export mod_strip_cmd
1046 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1047 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1048 # or CONFIG_MODULE_COMPRESS_XZ.
1050 mod_compress_cmd = true
1051 ifdef CONFIG_MODULE_COMPRESS
1052 ifdef CONFIG_MODULE_COMPRESS_GZIP
1053 mod_compress_cmd = $(KGZIP) -n -f
1054 endif # CONFIG_MODULE_COMPRESS_GZIP
1055 ifdef CONFIG_MODULE_COMPRESS_XZ
1056 mod_compress_cmd = $(XZ) -f
1057 endif # CONFIG_MODULE_COMPRESS_XZ
1058 endif # CONFIG_MODULE_COMPRESS
1059 export mod_compress_cmd
1061 ifdef CONFIG_MODULE_SIG_ALL
1062 $(eval $(call config_filename,MODULE_SIG_KEY))
1064 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
1070 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1072 has_libelf = $(call try-run,\
1073 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1075 ifdef CONFIG_STACK_VALIDATION
1076 ifeq ($(has_libelf),1)
1077 objtool_target := tools/objtool FORCE
1079 SKIP_STACK_VALIDATION := 1
1080 export SKIP_STACK_VALIDATION
1085 ifdef CONFIG_DEBUG_INFO_BTF
1086 ifeq ($(has_libelf),1)
1087 resolve_btfids_target := tools/bpf/resolve_btfids FORCE
1089 ERROR_RESOLVE_BTFIDS := 1
1091 endif # CONFIG_DEBUG_INFO_BTF
1096 export MODORDER := $(extmod-prefix)modules.order
1097 export MODULES_NSDEPS := $(extmod-prefix)modules.nsdeps
1099 ifeq ($(KBUILD_EXTMOD),)
1100 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1102 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
1103 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1104 $(libs-y) $(libs-m)))
1106 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1107 $(patsubst %/,%,$(filter %/, $(core-) \
1108 $(drivers-) $(libs-))))
1110 subdir-modorder := $(addsuffix modules.order,$(filter %/, \
1111 $(core-y) $(core-m) $(libs-y) $(libs-m) \
1112 $(drivers-y) $(drivers-m)))
1114 build-dirs := $(vmlinux-dirs)
1115 clean-dirs := $(vmlinux-alldirs)
1117 # Externally visible symbols (used by link-vmlinux.sh)
1118 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1119 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1120 ifdef CONFIG_MODULES
1121 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1122 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1124 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1126 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1128 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1129 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1130 # used by scripts/Makefile.package
1131 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1133 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1135 # Recurse until adjust_autoksyms.sh is satisfied
1136 PHONY += autoksyms_recursive
1137 ifdef CONFIG_TRIM_UNUSED_KSYMS
1138 # For the kernel to actually contain only the needed exported symbols,
1139 # we have to build modules as well to determine what those symbols are.
1140 # (this can be evaluated only once include/config/auto.conf has been included)
1143 autoksyms_recursive: descend modules.order
1144 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1145 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1148 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1150 quiet_cmd_autoksyms_h = GEN $@
1151 cmd_autoksyms_h = mkdir -p $(dir $@); \
1152 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1155 $(call cmd,autoksyms_h)
1157 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1159 # Final link of vmlinux with optional arch pass after final link
1160 cmd_link-vmlinux = \
1161 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
1162 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1164 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1165 +$(call if_changed,link-vmlinux)
1169 # The actual objects are generated when descending,
1170 # make sure no implicit rule kicks in
1171 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1173 filechk_kernel.release = \
1174 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1176 # Store (new) KERNELRELEASE string in include/config/kernel.release
1177 include/config/kernel.release: FORCE
1178 $(call filechk,kernel.release)
1180 # Additional helpers built in scripts/
1181 # Carefully list dependencies so we do not try to build scripts twice
1184 scripts: scripts_basic scripts_dtc
1185 $(Q)$(MAKE) $(build)=$(@)
1187 # Things we need to do before we recursively start building the kernel
1188 # or the modules are listed in "prepare".
1189 # A multi level approach is used. prepareN is processed before prepareN-1.
1190 # archprepare is used in arch Makefiles and when processed asm symlink,
1191 # version.h and scripts_basic is processed / created.
1193 PHONY += prepare archprepare
1195 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1196 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1197 include/generated/autoconf.h
1199 prepare0: archprepare
1200 $(Q)$(MAKE) $(build)=scripts/mod
1201 $(Q)$(MAKE) $(build)=.
1203 # All the preparing..
1204 prepare: prepare0 prepare-objtool prepare-resolve_btfids
1206 # Support for using generic headers in asm-generic
1207 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1209 PHONY += asm-generic uapi-asm-generic
1210 asm-generic: uapi-asm-generic
1211 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1212 generic=include/asm-generic
1214 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1215 generic=include/uapi/asm-generic
1217 PHONY += prepare-objtool prepare-resolve_btfids
1218 prepare-objtool: $(objtool_target)
1219 ifeq ($(SKIP_STACK_VALIDATION),1)
1220 ifdef CONFIG_UNWINDER_ORC
1221 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1224 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1228 prepare-resolve_btfids: $(resolve_btfids_target)
1229 ifeq ($(ERROR_RESOLVE_BTFIDS),1)
1230 @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1233 # Generate some files
1234 # ---------------------------------------------------------------------------
1236 # KERNELRELEASE can change from a few different places, meaning version.h
1237 # needs to be updated, so this check is forced on all builds
1240 define filechk_utsrelease.h
1241 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1242 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1245 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1248 define filechk_version.h
1249 echo \#define LINUX_VERSION_CODE $(shell \
1250 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1251 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1255 $(call filechk,version.h)
1256 $(Q)rm -f $(old_version_h)
1258 include/generated/utsrelease.h: include/config/kernel.release FORCE
1259 $(call filechk,utsrelease.h)
1263 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1264 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1266 # ---------------------------------------------------------------------------
1269 #Default location for installed headers
1270 export INSTALL_HDR_PATH = $(objtree)/usr
1272 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1273 cmd_headers_install = \
1274 mkdir -p $(INSTALL_HDR_PATH); \
1275 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1276 usr/include $(INSTALL_HDR_PATH)
1278 PHONY += headers_install
1279 headers_install: headers
1280 $(call cmd,headers_install)
1282 PHONY += archheaders archscripts
1284 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1287 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1288 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1289 $(error Headers not exportable for the $(SRCARCH) architecture))
1290 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1291 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1293 # Deprecated. It is no-op now.
1294 PHONY += headers_check
1298 ifdef CONFIG_HEADERS_INSTALL
1302 PHONY += scripts_unifdef
1303 scripts_unifdef: scripts_basic
1304 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1306 # ---------------------------------------------------------------------------
1311 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1314 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1316 PHONY += kselftest-merge
1318 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1319 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1320 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1321 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1323 # ---------------------------------------------------------------------------
1326 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1327 dtstree := arch/$(SRCARCH)/boot/dts
1332 %.dtb: include/config/kernel.release scripts_dtc
1333 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1335 PHONY += dtbs dtbs_install dtbs_check
1336 dtbs: include/config/kernel.release scripts_dtc
1337 $(Q)$(MAKE) $(build)=$(dtstree)
1339 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1341 dtbs: dt_binding_check
1347 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1349 ifdef CONFIG_OF_EARLY_FLATTREE
1355 PHONY += scripts_dtc
1356 scripts_dtc: scripts_basic
1357 $(Q)$(MAKE) $(build)=scripts/dtc
1359 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1360 export CHECK_DT_BINDING=y
1363 PHONY += dt_binding_check
1364 dt_binding_check: scripts_dtc
1365 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1367 # ---------------------------------------------------------------------------
1370 ifdef CONFIG_MODULES
1372 # By default, build modules as well
1376 # When we're building modules with modversions, we need to consider
1377 # the built-in objects during the descend as well, in order to
1378 # make sure the checksums are up to date before we record them.
1379 ifdef CONFIG_MODVERSIONS
1385 # A module can be listed more than once in obj-m resulting in
1386 # duplicate lines in modules.order files. Those are removed
1387 # using awk while concatenating to the final file.
1390 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1391 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1393 PHONY += modules_check
1394 modules_check: modules.order
1395 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1397 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1399 modules.order: $(subdir-modorder) FORCE
1400 $(call if_changed,modules_order)
1402 targets += modules.order
1404 # Target to prepare building external modules
1405 PHONY += modules_prepare
1406 modules_prepare: prepare
1407 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1409 # Target to install modules
1410 PHONY += modules_install
1411 modules_install: _modinst_ _modinst_post
1415 @rm -rf $(MODLIB)/kernel
1416 @rm -f $(MODLIB)/source
1417 @mkdir -p $(MODLIB)/kernel
1418 @ln -s $(abspath $(srctree)) $(MODLIB)/source
1419 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1420 rm -f $(MODLIB)/build ; \
1421 ln -s $(CURDIR) $(MODLIB)/build ; \
1423 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1424 @cp -f modules.builtin $(MODLIB)/
1425 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1426 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1428 # This depmod is only for convenience to give the initial
1429 # boot a modules.dep even before / is mounted read-write. However the
1430 # boot script depmod is the master version.
1431 PHONY += _modinst_post
1432 _modinst_post: _modinst_
1435 ifeq ($(CONFIG_MODULE_SIG), y)
1436 PHONY += modules_sign
1438 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1441 else # CONFIG_MODULES
1443 # Modules not configured
1444 # ---------------------------------------------------------------------------
1446 PHONY += modules modules_install
1447 modules modules_install:
1449 @echo >&2 "The present kernel configuration has modules disabled."
1450 @echo >&2 "Type 'make config' and enable loadable module support."
1451 @echo >&2 "Then build a kernel with module support enabled."
1455 endif # CONFIG_MODULES
1458 # Cleaning is done on three levels.
1459 # make clean Delete most generated files
1460 # Leave enough to build external modules
1461 # make mrproper Delete the current configuration, and all generated files
1462 # make distclean Remove editor backup files, patch leftover files and the like
1464 # Directories & files removed with 'make clean'
1465 CLEAN_FILES += include/ksym vmlinux.symvers \
1466 modules.builtin modules.builtin.modinfo modules.nsdeps \
1467 compile_commands.json
1469 # Directories & files removed with 'make mrproper'
1470 MRPROPER_FILES += include/config include/generated \
1471 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1472 debian snap tar-install \
1473 .config .config.old .version \
1475 signing_key.pem signing_key.priv signing_key.x509 \
1476 x509.genkey extra_certificates signing_key.x509.keyid \
1477 signing_key.x509.signer vmlinux-gdb.py \
1480 # Directories & files removed with 'make distclean'
1481 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1483 # clean - Delete most, but leave enough to build external modules
1485 clean: rm-files := $(CLEAN_FILES)
1487 PHONY += archclean vmlinuxclean
1490 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1491 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1493 clean: archclean vmlinuxclean
1495 # mrproper - Delete all generated files, including .config
1497 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1498 mrproper-dirs := $(addprefix _mrproper_,scripts)
1500 PHONY += $(mrproper-dirs) mrproper
1502 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1504 mrproper: clean $(mrproper-dirs)
1509 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1515 @find $(srctree) $(RCS_FIND_IGNORE) \
1516 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1517 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1518 -o -name 'core' \) \
1519 -type f -print | xargs rm -f
1522 # Packaging of the kernel to various formats
1523 # ---------------------------------------------------------------------------
1526 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1527 %pkg: include/config/kernel.release FORCE
1528 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1530 # Brief documentation of the typical targets used
1531 # ---------------------------------------------------------------------------
1533 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1534 boards := $(sort $(notdir $(boards)))
1535 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1536 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1540 @echo 'Cleaning targets:'
1541 @echo ' clean - Remove most generated files but keep the config and'
1542 @echo ' enough build support to build external modules'
1543 @echo ' mrproper - Remove all generated files + config + various backup files'
1544 @echo ' distclean - mrproper + remove editor backup and patch files'
1546 @echo 'Configuration targets:'
1547 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1549 @echo 'Other generic targets:'
1550 @echo ' all - Build all targets marked with [*]'
1551 @echo '* vmlinux - Build the bare kernel'
1552 @echo '* modules - Build all modules'
1553 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1554 @echo ' dir/ - Build all files in dir and below'
1555 @echo ' dir/file.[ois] - Build specified target only'
1556 @echo ' dir/file.ll - Build the LLVM assembly file'
1557 @echo ' (requires compiler support for LLVM assembly generation)'
1558 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1559 @echo ' (requires a recent binutils and recent build (System.map))'
1560 @echo ' dir/file.ko - Build module including final link'
1561 @echo ' modules_prepare - Set up for building external modules'
1562 @echo ' tags/TAGS - Generate tags file for editors'
1563 @echo ' cscope - Generate cscope index'
1564 @echo ' gtags - Generate GNU GLOBAL index'
1565 @echo ' kernelrelease - Output the release version string (use with make -s)'
1566 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1567 @echo ' image_name - Output the image name (use with make -s)'
1568 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1569 echo ' (default: $(INSTALL_HDR_PATH))'; \
1571 @echo 'Static analysers:'
1572 @echo ' checkstack - Generate a list of stack hogs'
1573 @echo ' versioncheck - Sanity check on version.h usage'
1574 @echo ' includecheck - Check for duplicate included header files'
1575 @echo ' export_report - List the usages of all exported symbols'
1576 @echo ' headerdep - Detect inclusion cycles in headers'
1577 @echo ' coccicheck - Check with Coccinelle'
1578 @echo ' clang-analyzer - Check with clang static analyzer'
1579 @echo ' clang-tidy - Check with clang-tidy'
1582 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1584 @echo 'Kernel selftest:'
1585 @echo ' kselftest - Build and run kernel selftest'
1586 @echo ' Build, install, and boot kernel before'
1587 @echo ' running kselftest on it'
1588 @echo ' Run as root for full coverage'
1589 @echo ' kselftest-all - Build kernel selftest'
1590 @echo ' kselftest-install - Build and install kernel selftest'
1591 @echo ' kselftest-clean - Remove all generated kselftest files'
1592 @echo ' kselftest-merge - Merge all the config dependencies of'
1593 @echo ' kselftest to existing .config.'
1596 echo 'Devicetree:'; \
1597 echo '* dtbs - Build device tree blobs for enabled boards'; \
1598 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1599 echo ' dt_binding_check - Validate device tree binding documents'; \
1600 echo ' dtbs_check - Validate device tree source files';\
1603 @echo 'Userspace tools targets:'
1604 @echo ' use "make tools/help"'
1605 @echo ' or "cd tools; make help"'
1607 @echo 'Kernel packaging:'
1608 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1610 @echo 'Documentation targets:'
1611 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1613 @echo 'Architecture specific targets ($(SRCARCH)):'
1614 @$(if $(archhelp),$(archhelp),\
1615 echo ' No architecture specific help defined for $(SRCARCH)')
1618 $(foreach b, $(boards), \
1619 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1621 @$(if $(board-dirs), \
1622 $(foreach b, $(board-dirs), \
1623 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1624 printf " %-16s - Show all of the above\\n" help-boards; \
1627 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1628 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1629 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1630 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1631 @echo ' (sparse by default)'
1632 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1633 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1634 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1635 @echo ' 1: warnings which may be relevant and do not occur too often'
1636 @echo ' 2: warnings which occur quite often but may still be relevant'
1637 @echo ' 3: more obscure warnings, can most likely be ignored'
1638 @echo ' Multiple levels can be combined with W=12 or W=123'
1640 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1641 @echo 'For further info see the ./README file'
1644 help-board-dirs := $(addprefix help-,$(board-dirs))
1646 help-boards: $(help-board-dirs)
1648 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1650 $(help-board-dirs): help-%:
1651 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1652 @$(if $(boards-per-dir), \
1653 $(foreach b, $(boards-per-dir), \
1654 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1658 # Documentation targets
1659 # ---------------------------------------------------------------------------
1660 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1661 linkcheckdocs dochelp refcheckdocs
1662 PHONY += $(DOC_TARGETS)
1664 $(Q)$(MAKE) $(build)=Documentation $@
1667 # ---------------------------------------------------------------------------
1669 PHONY += scripts_gdb
1670 scripts_gdb: prepare0
1671 $(Q)$(MAKE) $(build)=scripts/gdb
1672 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1674 ifdef CONFIG_GDB_SCRIPTS
1678 else # KBUILD_EXTMOD
1681 # External module support.
1682 # When building external modules the kernel used as basis is considered
1683 # read-only, and no consistency checks are made and the make
1684 # system is not used on the basis kernel. If updates are required
1685 # in the basis kernel ordinary make commands (without M=...) must
1688 # The following are the only valid targets when building external
1690 # make M=dir clean Delete all automatically generated files
1691 # make M=dir modules Make all modules in specified dir
1692 # make M=dir Same as 'make M=dir modules'
1693 # make M=dir modules_install
1694 # Install the modules built in the module directory
1695 # Assumes install directory is already created
1697 # We are always building only modules.
1701 build-dirs := $(KBUILD_EXTMOD)
1703 modules: $(MODORDER)
1704 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1706 $(MODORDER): descend
1709 PHONY += modules_install
1710 modules_install: _emodinst_ _emodinst_post
1712 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1715 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1716 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1718 PHONY += _emodinst_post
1719 _emodinst_post: _emodinst_
1722 compile_commands.json: $(extmod-prefix)compile_commands.json
1723 PHONY += compile_commands.json
1725 clean-dirs := $(KBUILD_EXTMOD)
1726 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1727 $(KBUILD_EXTMOD)/compile_commands.json
1731 @echo ' Building external modules.'
1732 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1734 @echo ' modules - default target, build the module(s)'
1735 @echo ' modules_install - install the module'
1736 @echo ' clean - remove generated files in module directory only'
1739 # no-op for external module builds
1740 PHONY += prepare modules_prepare
1742 endif # KBUILD_EXTMOD
1745 # ---------------------------------------------------------------------------
1746 # To build individual files in subdirectories, you can do like this:
1748 # make foo/bar/baz.s
1750 # The supported suffixes for single-target are listed in 'single-targets'
1752 # To build only under specific subdirectories, you can do like this:
1758 # .ko is special because modpost is needed
1759 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1760 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1762 $(single-ko): single_modpost
1764 $(single-no-ko): descend
1767 ifeq ($(KBUILD_EXTMOD),)
1768 # For the single build of in-tree modules, use a temporary file to avoid
1769 # the situation of modules_install installing an invalid modules.order.
1770 MODORDER := .modules.tmp
1773 PHONY += single_modpost
1774 single_modpost: $(single-no-ko) modules_prepare
1775 $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
1776 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1780 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
1782 # trim unrelated directories
1783 build-dirs := $(foreach d, $(build-dirs), \
1784 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1788 ifndef CONFIG_MODULES
1792 # Handle descending into subdirectories listed in $(build-dirs)
1793 # Preset locale variables to speed up the build process. Limit locale
1794 # tweaks to this spot to avoid wrong language settings when running
1795 # make menuconfig etc.
1796 # Error messages still appears in the original language
1797 PHONY += descend $(build-dirs)
1798 descend: $(build-dirs)
1799 $(build-dirs): prepare
1800 $(Q)$(MAKE) $(build)=$@ \
1801 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1802 need-builtin=1 need-modorder=1
1804 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1805 PHONY += $(clean-dirs) clean
1807 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1809 clean: $(clean-dirs)
1811 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1812 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1814 -o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1815 -o -name '*.dwo' -o -name '*.lst' \
1816 -o -name '*.su' -o -name '*.mod' \
1817 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1818 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1819 -o -name '*.asn1.[ch]' \
1820 -o -name '*.symtypes' -o -name 'modules.order' \
1821 -o -name '.tmp_*.o.*' \
1822 -o -name '*.c.[012]*.*' \
1824 -o -name '*.gcno' \) -type f -print | xargs rm -f
1826 # Generate tags for editors
1827 # ---------------------------------------------------------------------------
1828 quiet_cmd_tags = GEN $@
1829 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1831 tags TAGS cscope gtags: FORCE
1834 # Script to generate missing namespace dependencies
1835 # ---------------------------------------------------------------------------
1838 nsdeps: export KBUILD_NSDEPS=1
1840 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1843 # ---------------------------------------------------------------------------
1845 quiet_cmd_gen_compile_commands = GEN $@
1846 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1848 $(extmod-prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1849 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1850 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1851 $(call if_changed,gen_compile_commands)
1853 targets += $(extmod-prefix)compile_commands.json
1855 PHONY += clang-tidy clang-analyzer
1857 ifdef CONFIG_CC_IS_CLANG
1858 quiet_cmd_clang_tools = CHECK $<
1859 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1861 clang-tidy clang-analyzer: $(extmod-prefix)compile_commands.json
1862 $(call cmd,clang_tools)
1864 clang-tidy clang-analyzer:
1865 @echo "$@ requires CC=clang" >&2
1869 # Scripts to check various things for consistency
1870 # ---------------------------------------------------------------------------
1872 PHONY += includecheck versioncheck coccicheck export_report
1875 find $(srctree)/* $(RCS_FIND_IGNORE) \
1876 -name '*.[hcS]' -type f -print | sort \
1877 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1880 find $(srctree)/* $(RCS_FIND_IGNORE) \
1881 -name '*.[hcS]' -type f -print | sort \
1882 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1885 $(Q)$(BASH) $(srctree)/scripts/$@
1888 $(PERL) $(srctree)/scripts/export_report.pl
1890 PHONY += checkstack kernelrelease kernelversion image_name
1892 # UML needs a little special treatment here. It wants to use the host
1893 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1894 # else wants $(ARCH), including people doing cross-builds, which means
1895 # that $(SUBARCH) doesn't work here.
1897 CHECKSTACK_ARCH := $(SUBARCH)
1899 CHECKSTACK_ARCH := $(ARCH)
1902 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1903 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1906 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1909 @echo $(KERNELVERSION)
1912 @echo $(KBUILD_IMAGE)
1914 # Clear a bunch of variables before executing the submake
1916 ifeq ($(quiet),silent_)
1921 $(Q)mkdir -p $(objtree)/tools
1922 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1925 $(Q)mkdir -p $(objtree)/tools
1926 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1928 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1929 cmd_rmfiles = rm -rf $(rm-files)
1931 # Run depmod only if we have System.map and depmod is executable
1932 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1933 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1936 # read saved command lines for existing targets
1937 existing-targets := $(wildcard $(sort $(targets)))
1939 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1941 endif # config-build
1943 endif # need-sub-make
1948 # Declare the contents of the PHONY variable as phony. We keep that
1949 # information in a variable so we can use it in if_changed and friends.