1 # SPDX-License-Identifier: GPL-2.0
6 NAME = Frozen Wasteland
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))),)
102 export quiet Q KBUILD_VERBOSE
104 # Call a source code checker (by default, "sparse") as part of the
107 # Use 'make C=1' to enable checking of only re-compiled files.
108 # Use 'make C=2' to enable checking of *all* source files, regardless
109 # of whether they are re-compiled or not.
111 # See the file "Documentation/dev-tools/sparse.rst" for more details,
112 # including where to get the "sparse" utility.
114 ifeq ("$(origin C)", "command line")
115 KBUILD_CHECKSRC = $(C)
117 ifndef KBUILD_CHECKSRC
121 export KBUILD_CHECKSRC
123 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
124 # directory of external module to build. Setting M= takes precedence.
125 ifeq ("$(origin M)", "command line")
126 KBUILD_EXTMOD := $(M)
129 $(if $(word 2, $(KBUILD_EXTMOD)), \
130 $(error building multiple external modules is not supported))
134 # Kbuild will save output files in the current working directory.
135 # This does not need to match to the root of the kernel source tree.
137 # For example, you can do this:
139 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
141 # If you want to save output files in a different location, there are
142 # two syntaxes to specify it.
145 # Use "make O=dir/to/store/output/files/"
147 # 2) Set KBUILD_OUTPUT
148 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
149 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
151 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
154 # Do we want to change the working directory?
155 ifeq ("$(origin O)", "command line")
156 KBUILD_OUTPUT := $(O)
159 ifneq ($(KBUILD_OUTPUT),)
160 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
161 # expand a shell special character '~'. We use a somewhat tedious way here.
162 abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd)
163 $(if $(abs_objtree),, \
164 $(error failed to create output directory "$(KBUILD_OUTPUT)"))
166 # $(realpath ...) resolves symlinks
167 abs_objtree := $(realpath $(abs_objtree))
169 abs_objtree := $(CURDIR)
170 endif # ifneq ($(KBUILD_OUTPUT),)
172 ifeq ($(abs_objtree),$(CURDIR))
173 # Suppress "Entering directory ..." unless we are changing the work directory.
174 MAKEFLAGS += --no-print-directory
179 this-makefile := $(lastword $(MAKEFILE_LIST))
180 abs_srctree := $(realpath $(dir $(this-makefile)))
182 ifneq ($(words $(subst :, ,$(abs_srctree))), 1)
183 $(error source directory cannot contain spaces or colons)
186 ifneq ($(abs_srctree),$(abs_objtree))
187 # Look for make include files relative to root of kernel src
189 # This does not become effective immediately because MAKEFLAGS is re-parsed
190 # once after the Makefile is read. We need to invoke sub-make.
191 MAKEFLAGS += --include-dir=$(abs_srctree)
195 ifneq ($(filter 3.%,$(MAKE_VERSION)),)
196 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
197 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
199 # Cancel implicit rules for this Makefile.
203 export abs_srctree abs_objtree
204 export sub_make_done := 1
206 ifeq ($(need-sub-make),1)
208 PHONY += $(MAKECMDGOALS) __sub-make
210 $(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make
213 # Invoke a second make in the output directory, passing relevant variables
215 $(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS)
217 endif # need-sub-make
218 endif # sub_make_done
220 # We process the rest of the Makefile if this is the final invocation of make
221 ifeq ($(need-sub-make),)
223 # Do not print "Entering directory ...",
224 # but we want to display it when entering to the output directory
225 # so that IDEs/editors are able to understand relative filenames.
226 MAKEFLAGS += --no-print-directory
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
261 clean-targets := %clean mrproper cleandocs
262 no-dot-config-targets := $(clean-targets) \
263 cscope gtags TAGS tags help% %docs check% coccicheck \
264 $(version_h) headers headers_% archheaders archscripts \
265 %asm-generic kernelversion %src-pkg dt_binding_check \
267 # Installation targets should not require compiler. Unfortunately, vdso_install
268 # is an exception where build artifacts may be updated. This must be fixed.
269 no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
270 headers_install modules_install kernelrelease image_name
271 no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
273 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
282 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
283 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
288 ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
289 ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
294 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
295 ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
300 ifneq ($(KBUILD_EXTMOD),)
304 ifeq ($(KBUILD_EXTMOD),)
305 ifneq ($(filter %config,$(MAKECMDGOALS)),)
307 ifneq ($(words $(MAKECMDGOALS)),1)
313 # We cannot build single targets and the others at the same time
314 ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
316 ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
321 # For "make -j clean all", "make -j mrproper defconfig all", etc.
322 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
323 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
328 # install and modules_install need also be processed one by one
329 ifneq ($(filter install,$(MAKECMDGOALS)),)
330 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
336 # ===========================================================================
337 # We're called with mixed targets (*config and build targets).
338 # Handle them one by one.
340 PHONY += $(MAKECMDGOALS) __build_one_by_one
342 $(MAKECMDGOALS): __build_one_by_one
347 for i in $(MAKECMDGOALS); do \
348 $(MAKE) -f $(srctree)/Makefile $$i; \
353 include $(srctree)/scripts/Kbuild.include
355 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
356 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
357 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
358 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
360 include $(srctree)/scripts/subarch.include
362 # Cross compiling and selecting different set of gcc/bin-utils
363 # ---------------------------------------------------------------------------
365 # When performing cross compilation for other architectures ARCH shall be set
366 # to the target architecture. (See arch/* for the possibilities).
367 # ARCH can be set during invocation of make:
369 # Another way is to have ARCH set in the environment.
370 # The default ARCH is the host where make is executed.
372 # CROSS_COMPILE specify the prefix used for all executables used
373 # during compilation. Only gcc and related bin-utils executables
374 # are prefixed with $(CROSS_COMPILE).
375 # CROSS_COMPILE can be set on the command line
376 # make CROSS_COMPILE=ia64-linux-
377 # Alternatively CROSS_COMPILE can be set in the environment.
378 # Default value for CROSS_COMPILE is not to prefix executables
379 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
382 # Architecture as present in compile.h
383 UTS_MACHINE := $(ARCH)
386 # Additional ARCH settings for x86
390 ifeq ($(ARCH),x86_64)
394 # Additional ARCH settings for sparc
395 ifeq ($(ARCH),sparc32)
398 ifeq ($(ARCH),sparc64)
402 # Additional ARCH settings for sh
407 KCONFIG_CONFIG ?= .config
408 export KCONFIG_CONFIG
410 # Default file for 'make defconfig'. This may be overridden by arch-Makefile.
411 export KBUILD_DEFCONFIG := defconfig
413 # SHELL used by kbuild
416 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
417 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
418 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
428 export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \
429 -O2 -fomit-frame-pointer -std=gnu89
430 export KBUILD_USERLDFLAGS :=
432 KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS)
433 KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS)
434 KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
435 KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
437 # Make variables (CC, etc...)
444 OBJCOPY = llvm-objcopy
445 OBJDUMP = llvm-objdump
446 READELF = llvm-readelf
449 CC = $(CROSS_COMPILE)gcc
450 LD = $(CROSS_COMPILE)ld
451 AR = $(CROSS_COMPILE)ar
452 NM = $(CROSS_COMPILE)nm
453 OBJCOPY = $(CROSS_COMPILE)objcopy
454 OBJDUMP = $(CROSS_COMPILE)objdump
455 READELF = $(CROSS_COMPILE)readelf
456 STRIP = $(CROSS_COMPILE)strip
459 RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids
463 INSTALLKERNEL := installkernel
477 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
478 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
487 # Use USERINCLUDE when you must reference the UAPI directories only.
489 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
490 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
491 -I$(srctree)/include/uapi \
492 -I$(objtree)/include/generated/uapi \
493 -include $(srctree)/include/linux/compiler-version.h \
494 -include $(srctree)/include/linux/kconfig.h
496 # Use LINUXINCLUDE when you must reference the include/ directory.
497 # Needed to be compatible with the O= option
499 -I$(srctree)/arch/$(SRCARCH)/include \
500 -I$(objtree)/arch/$(SRCARCH)/include/generated \
501 $(if $(building_out_of_srctree),-I$(srctree)/include) \
502 -I$(objtree)/include \
505 KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
506 KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
507 -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
508 -Werror=implicit-function-declaration -Werror=implicit-int \
509 -Werror=return-type -Wno-format-security \
511 KBUILD_CPPFLAGS := -D__KERNEL__
512 KBUILD_AFLAGS_KERNEL :=
513 KBUILD_CFLAGS_KERNEL :=
514 KBUILD_AFLAGS_MODULE := -DMODULE
515 KBUILD_CFLAGS_MODULE := -DMODULE
516 KBUILD_LDFLAGS_MODULE :=
520 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
521 export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL
522 export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
523 export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD
524 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
526 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
527 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
528 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
529 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
530 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
532 # Files to ignore in find ... statements
534 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
535 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
537 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
538 --exclude CVS --exclude .pc --exclude .hg --exclude .git
540 # ===========================================================================
541 # Rules shared between *config targets and build targets
543 # Basic helpers built in scripts/basic/
544 PHONY += scripts_basic
546 $(Q)$(MAKE) $(build)=scripts/basic
547 $(Q)rm -f .tmp_quiet_recordmcount
549 PHONY += outputmakefile
550 # Before starting out-of-tree build, make sure the source tree is clean.
551 # outputmakefile generates a Makefile in the output directory, if using a
552 # separate output directory. This allows convenient use of make in the
554 # At the same time when output Makefile generated, generate .gitignore to
555 # ignore whole output directory
557 ifdef building_out_of_srctree
558 $(Q)if [ -f $(srctree)/.config -o \
559 -d $(srctree)/include/config -o \
560 -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
562 echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
563 echo >&2 "*** in $(abs_srctree)";\
567 $(Q)ln -fsn $(srctree) source
568 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
569 $(Q)test -e .gitignore || \
570 { echo "# this is build directory, ignore it"; echo "*"; } > .gitignore
573 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
574 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
575 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
576 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
577 CC_VERSION_TEXT = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1))
579 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
580 ifneq ($(CROSS_COMPILE),)
581 CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
584 CLANG_FLAGS += -integrated-as
586 CLANG_FLAGS += -no-integrated-as
587 GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
588 CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
590 CLANG_FLAGS += -Werror=unknown-warning-option
591 KBUILD_CFLAGS += $(CLANG_FLAGS)
592 KBUILD_AFLAGS += $(CLANG_FLAGS)
596 # Include this also for config targets because some architectures need
597 # cc-cross-prefix to determine CROSS_COMPILE.
599 include $(srctree)/scripts/Makefile.compiler
603 # ===========================================================================
604 # *config targets only - make sure prerequisites are updated, and descend
605 # in scripts/kconfig to make the *config target
607 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
608 # KBUILD_DEFCONFIG may point out an alternative default configuration
609 # used for 'make defconfig'
610 include $(srctree)/arch/$(SRCARCH)/Makefile
611 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
613 config: outputmakefile scripts_basic FORCE
614 $(Q)$(MAKE) $(build)=scripts/kconfig $@
616 %config: outputmakefile scripts_basic FORCE
617 $(Q)$(MAKE) $(build)=scripts/kconfig $@
620 # ===========================================================================
621 # Build targets only - this includes vmlinux, arch specific targets, clean
622 # targets and others. In general all targets except *config targets.
624 # If building an external module we do not care about the all: rule
625 # but instead __all depend on modules
627 ifeq ($(KBUILD_EXTMOD),)
633 # Decide whether to build built-in, modular, or both.
634 # Normally, just do built-in.
639 # If we have only "make modules", don't compile built-in objects.
640 ifeq ($(MAKECMDGOALS),modules)
644 # If we have "make <whatever> modules", compile modules
645 # in addition to whatever we do anyway.
646 # Just "make" or "make all" shall build modules as well
648 ifneq ($(filter all modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),)
652 ifeq ($(MAKECMDGOALS),)
656 export KBUILD_MODULES KBUILD_BUILTIN
659 include include/config/auto.conf
662 ifeq ($(KBUILD_EXTMOD),)
663 # Objects we will link into vmlinux / subdirs we need to visit
665 drivers-y := drivers/ sound/
666 drivers-$(CONFIG_SAMPLES) += samples/
667 drivers-$(CONFIG_NET) += net/
670 endif # KBUILD_EXTMOD
672 # The all: target is the default when no target is given on the
674 # This allow a user to issue only 'make' to build a kernel including modules
675 # Defaults to vmlinux, but the arch makefile usually adds further targets
678 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
679 $(call cc-option,-fno-tree-loop-im) \
680 $(call cc-disable-warning,maybe-uninitialized,)
683 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
684 ifdef CONFIG_FUNCTION_TRACER
685 CC_FLAGS_FTRACE := -pg
688 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
689 RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register
690 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
691 RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline
692 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
693 RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG)))
694 export RETPOLINE_CFLAGS
695 export RETPOLINE_VDSO_CFLAGS
697 include $(srctree)/arch/$(SRCARCH)/Makefile
700 ifdef may-sync-config
701 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
702 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
703 # because some architectures define CROSS_COMPILE there.
704 include include/config/auto.conf.cmd
708 @echo >&2 '*** Configuration file "$@" not found!'
710 @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or'
711 @echo >&2 '*** "make menuconfig" or "make xconfig").'
715 # The actual configuration files used during the build are stored in
716 # include/generated/ and include/config/. Update them if .config is newer than
717 # include/config/auto.conf (which mirrors .config).
719 # This exploits the 'multi-target pattern rule' trick.
720 # The syncconfig should be executed only once to make all the targets.
721 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
722 quiet_cmd_syncconfig = SYNC $@
723 cmd_syncconfig = $(MAKE) -f $(srctree)/Makefile syncconfig
725 %/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG)
726 +$(call cmd,syncconfig)
727 else # !may-sync-config
728 # External modules and some install targets need include/generated/autoconf.h
729 # and include/config/auto.conf but do not care if they are up-to-date.
730 # Use auto.conf to trigger the test
731 PHONY += include/config/auto.conf
733 include/config/auto.conf:
734 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
736 echo >&2 " ERROR: Kernel configuration is invalid."; \
737 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
738 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
742 endif # may-sync-config
745 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
746 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
747 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
748 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
749 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
751 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
753 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
755 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
759 # Tell gcc to never replace conditional load with a non-conditional one
760 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
761 KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races)
763 ifdef CONFIG_READABLE_ASM
764 # Disable optimizations that make assembler listings hard to read.
765 # reorder blocks reorders the control in the function
766 # ipa clone creates specialized cloned functions
767 # partial inlining inlines only parts of functions
768 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
769 $(call cc-option,-fno-ipa-cp-clone,) \
770 $(call cc-option,-fno-partial-inlining)
773 ifneq ($(CONFIG_FRAME_WARN),0)
774 KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
777 stackp-flags-y := -fno-stack-protector
778 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
779 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
781 KBUILD_CFLAGS += $(stackp-flags-y)
783 ifdef CONFIG_CC_IS_CLANG
784 KBUILD_CPPFLAGS += -Qunused-arguments
785 KBUILD_CFLAGS += -Wno-format-invalid-specifier
786 KBUILD_CFLAGS += -Wno-gnu
787 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
788 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
789 # See modpost pattern 2
790 KBUILD_CFLAGS += -mno-global-merge
793 # These warnings generated too much noise in a regular build.
794 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
795 KBUILD_CFLAGS += -Wno-unused-but-set-variable
797 # Warn about unmarked fall-throughs in switch statement.
798 # Disabled for clang while comment to attribute conversion happens and
799 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
800 KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
803 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
804 ifdef CONFIG_FRAME_POINTER
805 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
807 # Some targets (ARM with Thumb2, for example), can't be built with frame
808 # pointers. For those, we don't have FUNCTION_TRACER automatically
809 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
810 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
811 # -fomit-frame-pointer with FUNCTION_TRACER.
812 ifndef CONFIG_FUNCTION_TRACER
813 KBUILD_CFLAGS += -fomit-frame-pointer
817 # Initialize all stack variables with a 0xAA pattern.
818 ifdef CONFIG_INIT_STACK_ALL_PATTERN
819 KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern
822 # Initialize all stack variables with a zero value.
823 ifdef CONFIG_INIT_STACK_ALL_ZERO
824 # Future support for zero initialization is still being debated, see
825 # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being
826 # renamed or dropped.
827 KBUILD_CFLAGS += -ftrivial-auto-var-init=zero
828 KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
833 # Workaround for GCC versions < 5.0
834 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
835 ifdef CONFIG_CC_IS_GCC
836 DEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments))
839 ifdef CONFIG_DEBUG_INFO
841 ifdef CONFIG_DEBUG_INFO_SPLIT
842 DEBUG_CFLAGS += -gsplit-dwarf
847 ifneq ($(LLVM_IAS),1)
848 KBUILD_AFLAGS += -Wa,-gdwarf-2
851 ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
852 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
853 dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
854 DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
857 ifdef CONFIG_DEBUG_INFO_REDUCED
858 DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
859 $(call cc-option,-fno-var-tracking)
862 ifdef CONFIG_DEBUG_INFO_COMPRESSED
863 DEBUG_CFLAGS += -gz=zlib
864 KBUILD_AFLAGS += -gz=zlib
865 KBUILD_LDFLAGS += --compress-debug-sections=zlib
868 endif # CONFIG_DEBUG_INFO
870 KBUILD_CFLAGS += $(DEBUG_CFLAGS)
873 ifdef CONFIG_FUNCTION_TRACER
874 ifdef CONFIG_FTRACE_MCOUNT_USE_CC
875 CC_FLAGS_FTRACE += -mrecord-mcount
876 ifdef CONFIG_HAVE_NOP_MCOUNT
877 ifeq ($(call cc-option-yn, -mnop-mcount),y)
878 CC_FLAGS_FTRACE += -mnop-mcount
879 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
883 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
884 CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT
886 ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
887 ifdef CONFIG_HAVE_C_RECORDMCOUNT
888 BUILD_C_RECORDMCOUNT := y
889 export BUILD_C_RECORDMCOUNT
892 ifdef CONFIG_HAVE_FENTRY
893 ifeq ($(call cc-option-yn, -mfentry),y)
894 CC_FLAGS_FTRACE += -mfentry
895 CC_FLAGS_USING += -DCC_USING_FENTRY
898 export CC_FLAGS_FTRACE
899 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
900 KBUILD_AFLAGS += $(CC_FLAGS_USING)
903 # We trigger additional mismatches with less inlining
904 ifdef CONFIG_DEBUG_SECTION_MISMATCH
905 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
908 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
909 KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
910 LDFLAGS_vmlinux += --gc-sections
913 ifdef CONFIG_SHADOW_CALL_STACK
914 CC_FLAGS_SCS := -fsanitize=shadow-call-stack
915 KBUILD_CFLAGS += $(CC_FLAGS_SCS)
919 ifdef CONFIG_LTO_CLANG
920 ifdef CONFIG_LTO_CLANG_THIN
921 CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit
922 KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache
924 CC_FLAGS_LTO := -flto
926 CC_FLAGS_LTO += -fvisibility=hidden
928 # Limit inlining across translation units to reduce binary size
929 KBUILD_LDFLAGS += -mllvm -import-instr-limit=5
933 KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO)
934 KBUILD_AFLAGS += -fno-lto
938 ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_32B
939 KBUILD_CFLAGS += -falign-functions=32
942 # arch Makefile may override CC so keep this after arch Makefile is included
943 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
945 # warn about C99 declaration after statement
946 KBUILD_CFLAGS += -Wdeclaration-after-statement
948 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
949 KBUILD_CFLAGS += -Wvla
951 # disable pointer signed / unsigned warnings in gcc 4.0
952 KBUILD_CFLAGS += -Wno-pointer-sign
954 # disable stringop warnings in gcc 8+
955 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation)
957 # We'll want to enable this eventually, but it's not going away for 5.7 at least
958 KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds)
959 KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds)
960 KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow)
962 # Another good warning that we'll want to enable eventually
963 KBUILD_CFLAGS += $(call cc-disable-warning, restrict)
965 # Enabled with W=2, disabled by default as noisy
966 KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized)
968 # disable invalid "can't wrap" optimizations for signed / pointers
969 KBUILD_CFLAGS += -fno-strict-overflow
971 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
972 KBUILD_CFLAGS += -fno-stack-check
974 # conserve stack if available
975 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
977 # Prohibit date/time macros, which would make the build non-deterministic
978 KBUILD_CFLAGS += -Werror=date-time
980 # enforce correct pointer usage
981 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
983 # Require designated initializers for all marked structures
984 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
986 # change __FILE__ to the relative path from the srctree
987 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
989 # include additional Makefiles when needed
990 include-y := scripts/Makefile.extrawarn
991 include-$(CONFIG_KASAN) += scripts/Makefile.kasan
992 include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan
993 include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan
994 include-$(CONFIG_KCOV) += scripts/Makefile.kcov
995 include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins
997 include $(addprefix $(srctree)/, $(include-y))
999 # scripts/Makefile.gcc-plugins is intentionally included last.
1000 # Do not add $(call cc-option,...) below this line. When you build the kernel
1001 # from the clean source tree, the GCC plugins do not exist at this point.
1003 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
1004 KBUILD_CPPFLAGS += $(KCPPFLAGS)
1005 KBUILD_AFLAGS += $(KAFLAGS)
1006 KBUILD_CFLAGS += $(KCFLAGS)
1008 KBUILD_LDFLAGS_MODULE += --build-id=sha1
1009 LDFLAGS_vmlinux += --build-id=sha1
1011 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
1012 LDFLAGS_vmlinux += $(call ld-option, -X,)
1015 ifeq ($(CONFIG_RELR),y)
1016 LDFLAGS_vmlinux += --pack-dyn-relocs=relr
1019 # We never want expected sections to be placed heuristically by the
1020 # linker. All sections should be explicitly named in the linker script.
1021 ifdef CONFIG_LD_ORPHAN_WARN
1022 LDFLAGS_vmlinux += --orphan-handling=warn
1025 # Align the bit size of userspace programs with the kernel
1026 KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1027 KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
1029 # make the checker run with the right architecture
1030 CHECKFLAGS += --arch=$(ARCH)
1032 # insure the checker run with the right endianness
1033 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
1035 # the checker needs the correct machine size
1036 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
1038 # Default kernel image to build when no specific target is given.
1039 # KBUILD_IMAGE may be overruled on the command line or
1040 # set in the environment
1041 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1042 # this default value
1043 export KBUILD_IMAGE ?= vmlinux
1046 # INSTALL_PATH specifies where to place the updated kernel and system map
1047 # images. Default is /boot, but you can set it to other values
1048 export INSTALL_PATH ?= /boot
1051 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1052 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1053 # an argument if needed. Otherwise it defaults to the kernel install path
1055 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
1058 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1059 # relocations required by build roots. This is not defined in the
1060 # makefile but the argument can be passed to make if needed.
1063 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
1066 HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf)
1068 has_libelf = $(call try-run,\
1069 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0)
1071 ifdef CONFIG_STACK_VALIDATION
1072 ifeq ($(has_libelf),1)
1073 objtool_target := tools/objtool FORCE
1075 SKIP_STACK_VALIDATION := 1
1076 export SKIP_STACK_VALIDATION
1080 PHONY += resolve_btfids_clean
1082 resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids
1084 # tools/bpf/resolve_btfids directory might not exist
1085 # in output directory, skip its clean in that case
1086 resolve_btfids_clean:
1087 ifneq ($(wildcard $(resolve_btfids_O)),)
1088 $(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean
1092 ifdef CONFIG_DEBUG_INFO_BTF
1093 ifeq ($(has_libelf),1)
1094 resolve_btfids_target := tools/bpf/resolve_btfids FORCE
1096 ERROR_RESOLVE_BTFIDS := 1
1098 endif # CONFIG_DEBUG_INFO_BTF
1103 export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
1104 export MODORDER := $(extmod_prefix)modules.order
1105 export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
1107 ifeq ($(KBUILD_EXTMOD),)
1108 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
1110 vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
1111 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
1112 $(libs-y) $(libs-m)))
1114 vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
1115 $(patsubst %/,%,$(filter %/, $(core-) \
1116 $(drivers-) $(libs-))))
1118 subdir-modorder := $(addsuffix modules.order,$(filter %/, \
1119 $(core-y) $(core-m) $(libs-y) $(libs-m) \
1120 $(drivers-y) $(drivers-m)))
1122 build-dirs := $(vmlinux-dirs)
1123 clean-dirs := $(vmlinux-alldirs)
1125 # Externally visible symbols (used by link-vmlinux.sh)
1126 KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
1127 KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
1128 ifdef CONFIG_MODULES
1129 KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
1130 KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
1132 KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
1134 KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
1136 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1137 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
1138 # used by scripts/Makefile.package
1139 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
1141 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
1143 # Recurse until adjust_autoksyms.sh is satisfied
1144 PHONY += autoksyms_recursive
1145 ifdef CONFIG_TRIM_UNUSED_KSYMS
1146 # For the kernel to actually contain only the needed exported symbols,
1147 # we have to build modules as well to determine what those symbols are.
1148 # (this can be evaluated only once include/config/auto.conf has been included)
1151 autoksyms_recursive: descend modules.order
1152 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1153 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1156 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
1158 quiet_cmd_autoksyms_h = GEN $@
1159 cmd_autoksyms_h = mkdir -p $(dir $@); \
1160 $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@
1163 $(call cmd,autoksyms_h)
1165 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1167 # Final link of vmlinux with optional arch pass after final link
1168 cmd_link-vmlinux = \
1169 $(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
1170 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1172 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1173 +$(call if_changed_dep,link-vmlinux)
1177 # The actual objects are generated when descending,
1178 # make sure no implicit rule kicks in
1179 $(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
1181 filechk_kernel.release = \
1182 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1184 # Store (new) KERNELRELEASE string in include/config/kernel.release
1185 include/config/kernel.release: FORCE
1186 $(call filechk,kernel.release)
1188 # Additional helpers built in scripts/
1189 # Carefully list dependencies so we do not try to build scripts twice
1192 scripts: scripts_basic scripts_dtc
1193 $(Q)$(MAKE) $(build)=$(@)
1195 # Things we need to do before we recursively start building the kernel
1196 # or the modules are listed in "prepare".
1197 # A multi level approach is used. prepareN is processed before prepareN-1.
1198 # archprepare is used in arch Makefiles and when processed asm symlink,
1199 # version.h and scripts_basic is processed / created.
1201 PHONY += prepare archprepare
1203 archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
1204 asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1205 include/generated/autoconf.h
1207 prepare0: archprepare
1208 $(Q)$(MAKE) $(build)=scripts/mod
1209 $(Q)$(MAKE) $(build)=.
1211 # All the preparing..
1212 prepare: prepare0 prepare-objtool prepare-resolve_btfids
1214 # Support for using generic headers in asm-generic
1215 asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
1217 PHONY += asm-generic uapi-asm-generic
1218 asm-generic: uapi-asm-generic
1219 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \
1220 generic=include/asm-generic
1222 $(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \
1223 generic=include/uapi/asm-generic
1225 PHONY += prepare-objtool prepare-resolve_btfids
1226 prepare-objtool: $(objtool_target)
1227 ifeq ($(SKIP_STACK_VALIDATION),1)
1228 ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
1229 @echo "error: Cannot generate __mcount_loc for CONFIG_DYNAMIC_FTRACE=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1232 ifdef CONFIG_UNWINDER_ORC
1233 @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1236 @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1240 prepare-resolve_btfids: $(resolve_btfids_target)
1241 ifeq ($(ERROR_RESOLVE_BTFIDS),1)
1242 @echo "error: Cannot resolve BTF IDs for CONFIG_DEBUG_INFO_BTF, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1245 # Generate some files
1246 # ---------------------------------------------------------------------------
1248 # KERNELRELEASE can change from a few different places, meaning version.h
1249 # needs to be updated, so this check is forced on all builds
1252 define filechk_utsrelease.h
1253 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1254 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1257 echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"
1260 define filechk_version.h
1261 if [ $(SUBLEVEL) -gt 255 ]; then \
1262 echo \#define LINUX_VERSION_CODE $(shell \
1263 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \
1265 echo \#define LINUX_VERSION_CODE $(shell \
1266 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1268 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \
1269 ((c) > 255 ? 255 : (c)))'; \
1270 echo \#define LINUX_VERSION_MAJOR $(VERSION); \
1271 echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \
1272 echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL)
1275 $(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0)
1276 $(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0)
1278 $(call filechk,version.h)
1280 include/generated/utsrelease.h: include/config/kernel.release FORCE
1281 $(call filechk,utsrelease.h)
1285 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1286 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1288 # ---------------------------------------------------------------------------
1291 #Default location for installed headers
1292 export INSTALL_HDR_PATH = $(objtree)/usr
1294 quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include
1295 cmd_headers_install = \
1296 mkdir -p $(INSTALL_HDR_PATH); \
1297 rsync -mrl --include='*/' --include='*\.h' --exclude='*' \
1298 usr/include $(INSTALL_HDR_PATH)
1300 PHONY += headers_install
1301 headers_install: headers
1302 $(call cmd,headers_install)
1304 PHONY += archheaders archscripts
1306 hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
1309 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts
1310 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1311 $(error Headers not exportable for the $(SRCARCH) architecture))
1312 $(Q)$(MAKE) $(hdr-inst)=include/uapi
1313 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi
1315 # Deprecated. It is no-op now.
1316 PHONY += headers_check
1318 @echo >&2 "=================== WARNING ==================="
1319 @echo >&2 "Since Linux 5.5, 'make headers_check' is no-op,"
1320 @echo >&2 "and will be removed after Linux 5.15 release."
1321 @echo >&2 "Please remove headers_check from your scripts."
1322 @echo >&2 "==============================================="
1324 ifdef CONFIG_HEADERS_INSTALL
1328 PHONY += scripts_unifdef
1329 scripts_unifdef: scripts_basic
1330 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1332 # ---------------------------------------------------------------------------
1337 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1340 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $*
1342 PHONY += kselftest-merge
1344 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1345 $(Q)find $(srctree)/tools/testing/selftests -name config | \
1346 xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
1347 $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1349 # ---------------------------------------------------------------------------
1352 ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),)
1353 dtstree := arch/$(SRCARCH)/boot/dts
1358 %.dtb: include/config/kernel.release scripts_dtc
1359 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1361 %.dtbo: include/config/kernel.release scripts_dtc
1362 $(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
1364 PHONY += dtbs dtbs_install dtbs_check
1365 dtbs: include/config/kernel.release scripts_dtc
1366 $(Q)$(MAKE) $(build)=$(dtstree)
1368 ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),)
1370 dtbs: dt_binding_check
1376 $(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH)
1378 ifdef CONFIG_OF_EARLY_FLATTREE
1384 PHONY += scripts_dtc
1385 scripts_dtc: scripts_basic
1386 $(Q)$(MAKE) $(build)=scripts/dtc
1388 ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),)
1389 export CHECK_DT_BINDING=y
1392 PHONY += dt_binding_check
1393 dt_binding_check: scripts_dtc
1394 $(Q)$(MAKE) $(build)=Documentation/devicetree/bindings
1396 # ---------------------------------------------------------------------------
1399 ifdef CONFIG_MODULES
1401 # By default, build modules as well
1405 # When we're building modules with modversions, we need to consider
1406 # the built-in objects during the descend as well, in order to
1407 # make sure the checksums are up to date before we record them.
1408 ifdef CONFIG_MODVERSIONS
1414 # A module can be listed more than once in obj-m resulting in
1415 # duplicate lines in modules.order files. Those are removed
1416 # using awk while concatenating to the final file.
1419 modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
1421 cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
1423 modules.order: $(subdir-modorder) FORCE
1424 $(call if_changed,modules_order)
1426 targets += modules.order
1428 # Target to prepare building external modules
1429 PHONY += modules_prepare
1430 modules_prepare: prepare
1431 $(Q)$(MAKE) $(build)=scripts scripts/module.lds
1433 export modules_sign_only :=
1435 ifeq ($(CONFIG_MODULE_SIG),y)
1436 PHONY += modules_sign
1437 modules_sign: modules_install
1440 # modules_sign is a subset of modules_install.
1441 # 'make modules_install modules_sign' is equivalent to 'make modules_install'.
1442 ifeq ($(filter modules_install,$(MAKECMDGOALS)),)
1443 modules_sign_only := y
1448 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
1449 modinst_pre := __modinst_pre
1452 modules_install: $(modinst_pre)
1453 PHONY += __modinst_pre
1455 @rm -rf $(MODLIB)/kernel
1456 @rm -f $(MODLIB)/source
1457 @mkdir -p $(MODLIB)/kernel
1458 @ln -s $(abspath $(srctree)) $(MODLIB)/source
1459 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1460 rm -f $(MODLIB)/build ; \
1461 ln -s $(CURDIR) $(MODLIB)/build ; \
1463 @sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order
1464 @cp -f modules.builtin $(MODLIB)/
1465 @cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/
1467 endif # CONFIG_MODULES
1470 # Cleaning is done on three levels.
1471 # make clean Delete most generated files
1472 # Leave enough to build external modules
1473 # make mrproper Delete the current configuration, and all generated files
1474 # make distclean Remove editor backup files, patch leftover files and the like
1476 # Directories & files removed with 'make clean'
1477 CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
1478 modules.builtin modules.builtin.modinfo modules.nsdeps \
1479 compile_commands.json .thinlto-cache
1481 # Directories & files removed with 'make mrproper'
1482 MRPROPER_FILES += include/config include/generated \
1483 arch/$(SRCARCH)/include/generated .tmp_objdiff \
1484 debian snap tar-install \
1485 .config .config.old .version \
1487 signing_key.pem signing_key.priv signing_key.x509 \
1488 x509.genkey extra_certificates signing_key.x509.keyid \
1489 signing_key.x509.signer vmlinux-gdb.py \
1492 # Directories & files removed with 'make distclean'
1493 DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
1495 # clean - Delete most, but leave enough to build external modules
1497 clean: rm-files := $(CLEAN_FILES)
1499 PHONY += archclean vmlinuxclean
1502 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1503 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1505 clean: archclean vmlinuxclean resolve_btfids_clean
1507 # mrproper - Delete all generated files, including .config
1509 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1510 mrproper-dirs := $(addprefix _mrproper_,scripts)
1512 PHONY += $(mrproper-dirs) mrproper
1514 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1516 mrproper: clean $(mrproper-dirs)
1521 distclean: rm-files := $(wildcard $(DISTCLEAN_FILES))
1527 @find $(srctree) $(RCS_FIND_IGNORE) \
1528 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1529 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1530 -o -name 'core' \) \
1531 -type f -print | xargs rm -f
1534 # Packaging of the kernel to various formats
1535 # ---------------------------------------------------------------------------
1538 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1539 %pkg: include/config/kernel.release FORCE
1540 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
1542 # Brief documentation of the typical targets used
1543 # ---------------------------------------------------------------------------
1545 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1546 boards := $(sort $(notdir $(boards)))
1547 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1548 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1552 @echo 'Cleaning targets:'
1553 @echo ' clean - Remove most generated files but keep the config and'
1554 @echo ' enough build support to build external modules'
1555 @echo ' mrproper - Remove all generated files + config + various backup files'
1556 @echo ' distclean - mrproper + remove editor backup and patch files'
1558 @echo 'Configuration targets:'
1559 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1561 @echo 'Other generic targets:'
1562 @echo ' all - Build all targets marked with [*]'
1563 @echo '* vmlinux - Build the bare kernel'
1564 @echo '* modules - Build all modules'
1565 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1566 @echo ' dir/ - Build all files in dir and below'
1567 @echo ' dir/file.[ois] - Build specified target only'
1568 @echo ' dir/file.ll - Build the LLVM assembly file'
1569 @echo ' (requires compiler support for LLVM assembly generation)'
1570 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1571 @echo ' (requires a recent binutils and recent build (System.map))'
1572 @echo ' dir/file.ko - Build module including final link'
1573 @echo ' modules_prepare - Set up for building external modules'
1574 @echo ' tags/TAGS - Generate tags file for editors'
1575 @echo ' cscope - Generate cscope index'
1576 @echo ' gtags - Generate GNU GLOBAL index'
1577 @echo ' kernelrelease - Output the release version string (use with make -s)'
1578 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1579 @echo ' image_name - Output the image name (use with make -s)'
1580 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1581 echo ' (default: $(INSTALL_HDR_PATH))'; \
1583 @echo 'Static analysers:'
1584 @echo ' checkstack - Generate a list of stack hogs'
1585 @echo ' versioncheck - Sanity check on version.h usage'
1586 @echo ' includecheck - Check for duplicate included header files'
1587 @echo ' export_report - List the usages of all exported symbols'
1588 @echo ' headerdep - Detect inclusion cycles in headers'
1589 @echo ' coccicheck - Check with Coccinelle'
1590 @echo ' clang-analyzer - Check with clang static analyzer'
1591 @echo ' clang-tidy - Check with clang-tidy'
1594 @echo ' nsdeps - Generate missing symbol namespace dependencies'
1596 @echo 'Kernel selftest:'
1597 @echo ' kselftest - Build and run kernel selftest'
1598 @echo ' Build, install, and boot kernel before'
1599 @echo ' running kselftest on it'
1600 @echo ' Run as root for full coverage'
1601 @echo ' kselftest-all - Build kernel selftest'
1602 @echo ' kselftest-install - Build and install kernel selftest'
1603 @echo ' kselftest-clean - Remove all generated kselftest files'
1604 @echo ' kselftest-merge - Merge all the config dependencies of'
1605 @echo ' kselftest to existing .config.'
1608 echo 'Devicetree:'; \
1609 echo '* dtbs - Build device tree blobs for enabled boards'; \
1610 echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1611 echo ' dt_binding_check - Validate device tree binding documents'; \
1612 echo ' dtbs_check - Validate device tree source files';\
1615 @echo 'Userspace tools targets:'
1616 @echo ' use "make tools/help"'
1617 @echo ' or "cd tools; make help"'
1619 @echo 'Kernel packaging:'
1620 @$(MAKE) -f $(srctree)/scripts/Makefile.package help
1622 @echo 'Documentation targets:'
1623 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1625 @echo 'Architecture specific targets ($(SRCARCH)):'
1626 @$(if $(archhelp),$(archhelp),\
1627 echo ' No architecture specific help defined for $(SRCARCH)')
1630 $(foreach b, $(boards), \
1631 printf " %-27s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1633 @$(if $(board-dirs), \
1634 $(foreach b, $(board-dirs), \
1635 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1636 printf " %-16s - Show all of the above\\n" help-boards; \
1639 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1640 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1641 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1642 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK'
1643 @echo ' (sparse by default)'
1644 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1645 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1646 @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1647 @echo ' 1: warnings which may be relevant and do not occur too often'
1648 @echo ' 2: warnings which occur quite often but may still be relevant'
1649 @echo ' 3: more obscure warnings, can most likely be ignored'
1650 @echo ' Multiple levels can be combined with W=12 or W=123'
1652 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1653 @echo 'For further info see the ./README file'
1656 help-board-dirs := $(addprefix help-,$(board-dirs))
1658 help-boards: $(help-board-dirs)
1660 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1662 $(help-board-dirs): help-%:
1663 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1664 @$(if $(boards-per-dir), \
1665 $(foreach b, $(boards-per-dir), \
1666 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1670 # Documentation targets
1671 # ---------------------------------------------------------------------------
1672 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1673 linkcheckdocs dochelp refcheckdocs
1674 PHONY += $(DOC_TARGETS)
1676 $(Q)$(MAKE) $(build)=Documentation $@
1679 # ---------------------------------------------------------------------------
1681 PHONY += scripts_gdb
1682 scripts_gdb: prepare0
1683 $(Q)$(MAKE) $(build)=scripts/gdb
1684 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1686 ifdef CONFIG_GDB_SCRIPTS
1690 else # KBUILD_EXTMOD
1693 # External module support.
1694 # When building external modules the kernel used as basis is considered
1695 # read-only, and no consistency checks are made and the make
1696 # system is not used on the basis kernel. If updates are required
1697 # in the basis kernel ordinary make commands (without M=...) must
1700 # The following are the only valid targets when building external
1702 # make M=dir clean Delete all automatically generated files
1703 # make M=dir modules Make all modules in specified dir
1704 # make M=dir Same as 'make M=dir modules'
1705 # make M=dir modules_install
1706 # Install the modules built in the module directory
1707 # Assumes install directory is already created
1709 # We are always building only modules.
1713 build-dirs := $(KBUILD_EXTMOD)
1714 $(MODORDER): descend
1717 compile_commands.json: $(extmod_prefix)compile_commands.json
1718 PHONY += compile_commands.json
1720 clean-dirs := $(KBUILD_EXTMOD)
1721 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \
1722 $(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache
1726 @echo ' Building external modules.'
1727 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1729 @echo ' modules - default target, build the module(s)'
1730 @echo ' modules_install - install the module'
1731 @echo ' clean - remove generated files in module directory only'
1734 # no-op for external module builds
1735 PHONY += prepare modules_prepare
1737 endif # KBUILD_EXTMOD
1739 # ---------------------------------------------------------------------------
1742 PHONY += modules modules_install
1744 ifdef CONFIG_MODULES
1746 modules: modules_check
1747 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1749 PHONY += modules_check
1750 modules_check: $(MODORDER)
1751 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $<
1753 quiet_cmd_depmod = DEPMOD $(MODLIB)
1754 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1758 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1761 else # CONFIG_MODULES
1763 # Modules not configured
1764 # ---------------------------------------------------------------------------
1766 modules modules_install:
1768 @echo >&2 '*** The present kernel configuration has modules disabled.'
1769 @echo >&2 '*** To use the module feature, please run "make menuconfig" etc.'
1770 @echo >&2 '*** to enable CONFIG_MODULES.'
1774 endif # CONFIG_MODULES
1777 # ---------------------------------------------------------------------------
1778 # To build individual files in subdirectories, you can do like this:
1780 # make foo/bar/baz.s
1782 # The supported suffixes for single-target are listed in 'single-targets'
1784 # To build only under specific subdirectories, you can do like this:
1790 # .ko is special because modpost is needed
1791 single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
1792 single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS)))
1794 $(single-ko): single_modpost
1796 $(single-no-ko): descend
1799 ifeq ($(KBUILD_EXTMOD),)
1800 # For the single build of in-tree modules, use a temporary file to avoid
1801 # the situation of modules_install installing an invalid modules.order.
1802 MODORDER := .modules.tmp
1805 PHONY += single_modpost
1806 single_modpost: $(single-no-ko) modules_prepare
1807 $(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
1808 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1812 export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
1814 # trim unrelated directories
1815 build-dirs := $(foreach d, $(build-dirs), \
1816 $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
1820 ifndef CONFIG_MODULES
1824 # Handle descending into subdirectories listed in $(build-dirs)
1825 # Preset locale variables to speed up the build process. Limit locale
1826 # tweaks to this spot to avoid wrong language settings when running
1827 # make menuconfig etc.
1828 # Error messages still appears in the original language
1829 PHONY += descend $(build-dirs)
1830 descend: $(build-dirs)
1831 $(build-dirs): prepare
1832 $(Q)$(MAKE) $(build)=$@ \
1833 single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
1834 need-builtin=1 need-modorder=1
1836 clean-dirs := $(addprefix _clean_, $(clean-dirs))
1837 PHONY += $(clean-dirs) clean
1839 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1841 clean: $(clean-dirs)
1843 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1844 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1846 -o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
1847 -o -name '*.dwo' -o -name '*.lst' \
1848 -o -name '*.su' -o -name '*.mod' \
1849 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1850 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1851 -o -name '*.asn1.[ch]' \
1852 -o -name '*.symtypes' -o -name 'modules.order' \
1853 -o -name '.tmp_*.o.*' \
1854 -o -name '*.c.[012]*.*' \
1857 -o -name '*.*.symversions' \) -type f -print | xargs rm -f
1859 # Generate tags for editors
1860 # ---------------------------------------------------------------------------
1861 quiet_cmd_tags = GEN $@
1862 cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
1864 tags TAGS cscope gtags: FORCE
1867 # Script to generate missing namespace dependencies
1868 # ---------------------------------------------------------------------------
1871 nsdeps: export KBUILD_NSDEPS=1
1873 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps
1876 # ---------------------------------------------------------------------------
1878 quiet_cmd_gen_compile_commands = GEN $@
1879 cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
1881 $(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
1882 $(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
1883 $(if $(CONFIG_MODULES), $(MODORDER)) FORCE
1884 $(call if_changed,gen_compile_commands)
1886 targets += $(extmod_prefix)compile_commands.json
1888 PHONY += clang-tidy clang-analyzer
1890 ifdef CONFIG_CC_IS_CLANG
1891 quiet_cmd_clang_tools = CHECK $<
1892 cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $<
1894 clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json
1895 $(call cmd,clang_tools)
1897 clang-tidy clang-analyzer:
1898 @echo "$@ requires CC=clang" >&2
1902 # Scripts to check various things for consistency
1903 # ---------------------------------------------------------------------------
1905 PHONY += includecheck versioncheck coccicheck export_report
1908 find $(srctree)/* $(RCS_FIND_IGNORE) \
1909 -name '*.[hcS]' -type f -print | sort \
1910 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1913 find $(srctree)/* $(RCS_FIND_IGNORE) \
1914 -name '*.[hcS]' -type f -print | sort \
1915 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1918 $(Q)$(BASH) $(srctree)/scripts/$@
1921 $(PERL) $(srctree)/scripts/export_report.pl
1923 PHONY += checkstack kernelrelease kernelversion image_name
1925 # UML needs a little special treatment here. It wants to use the host
1926 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1927 # else wants $(ARCH), including people doing cross-builds, which means
1928 # that $(SUBARCH) doesn't work here.
1930 CHECKSTACK_ARCH := $(SUBARCH)
1932 CHECKSTACK_ARCH := $(ARCH)
1935 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1936 $(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1939 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1942 @echo $(KERNELVERSION)
1945 @echo $(KBUILD_IMAGE)
1947 # Clear a bunch of variables before executing the submake
1949 ifeq ($(quiet),silent_)
1954 $(Q)mkdir -p $(objtree)/tools
1955 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/
1958 $(Q)mkdir -p $(objtree)/tools
1959 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $*
1961 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1962 cmd_rmfiles = rm -rf $(rm-files)
1964 # read saved command lines for existing targets
1965 existing-targets := $(wildcard $(sort $(targets)))
1967 -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
1969 endif # config-build
1971 endif # need-sub-make
1976 # Declare the contents of the PHONY variable as phony. We keep that
1977 # information in a variable so we can use it in if_changed and friends.