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
:= $(no-dot-config-targets
) install %install \
270 single-targets
:= %.a
%.i
%.ko
%.lds
%.ll
%.lst
%.mod
%.o
%.s
%.symtypes
%/
278 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
279 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
284 ifneq ($(filter $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
285 ifeq ($(filter-out $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
290 ifneq ($(KBUILD_EXTMOD
),)
294 ifeq ($(KBUILD_EXTMOD
),)
295 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
297 ifneq ($(words $(MAKECMDGOALS
)),1)
303 # We cannot build single targets and the others at the same time
304 ifneq ($(filter $(single-targets
), $(MAKECMDGOALS
)),)
306 ifneq ($(filter-out $(single-targets
), $(MAKECMDGOALS
)),)
311 # For "make -j clean all", "make -j mrproper defconfig all", etc.
312 ifneq ($(filter $(clean-targets
),$(MAKECMDGOALS
)),)
313 ifneq ($(filter-out $(clean-targets
),$(MAKECMDGOALS
)),)
318 # install and modules_install need also be processed one by one
319 ifneq ($(filter install,$(MAKECMDGOALS
)),)
320 ifneq ($(filter modules_install
,$(MAKECMDGOALS
)),)
326 # ===========================================================================
327 # We're called with mixed targets (*config and build targets).
328 # Handle them one by one.
330 PHONY
+= $(MAKECMDGOALS
) __build_one_by_one
332 $(MAKECMDGOALS
): __build_one_by_one
337 for i in
$(MAKECMDGOALS
); do \
338 $(MAKE
) -f
$(srctree
)/Makefile
$$i; \
343 include scripts
/Kbuild.
include
345 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
346 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
347 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
348 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
350 include scripts
/subarch.
include
352 # Cross compiling and selecting different set of gcc/bin-utils
353 # ---------------------------------------------------------------------------
355 # When performing cross compilation for other architectures ARCH shall be set
356 # to the target architecture. (See arch/* for the possibilities).
357 # ARCH can be set during invocation of make:
359 # Another way is to have ARCH set in the environment.
360 # The default ARCH is the host where make is executed.
362 # CROSS_COMPILE specify the prefix used for all executables used
363 # during compilation. Only gcc and related bin-utils executables
364 # are prefixed with $(CROSS_COMPILE).
365 # CROSS_COMPILE can be set on the command line
366 # make CROSS_COMPILE=ia64-linux-
367 # Alternatively CROSS_COMPILE can be set in the environment.
368 # Default value for CROSS_COMPILE is not to prefix executables
369 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
372 # Architecture as present in compile.h
373 UTS_MACHINE
:= $(ARCH
)
376 # Additional ARCH settings for x86
380 ifeq ($(ARCH
),x86_64
)
384 # Additional ARCH settings for sparc
385 ifeq ($(ARCH
),sparc32
)
388 ifeq ($(ARCH
),sparc64
)
392 # Additional ARCH settings for sh
397 KCONFIG_CONFIG ?
= .config
398 export KCONFIG_CONFIG
400 # Default file for 'make defconfig'. This may be overridden by arch-Makefile.
401 export KBUILD_DEFCONFIG
:= defconfig
403 # SHELL used by kbuild
406 HOST_LFS_CFLAGS
:= $(shell getconf LFS_CFLAGS
2>/dev
/null
)
407 HOST_LFS_LDFLAGS
:= $(shell getconf LFS_LDFLAGS
2>/dev
/null
)
408 HOST_LFS_LIBS
:= $(shell getconf LFS_LIBS
2>/dev
/null
)
418 export KBUILD_USERCFLAGS
:= -Wall
-Wmissing-prototypes
-Wstrict-prototypes \
419 -O2
-fomit-frame-pointer
-std
=gnu89
420 export KBUILD_USERLDFLAGS
:=
422 KBUILD_HOSTCFLAGS
:= $(KBUILD_USERCFLAGS
) $(HOST_LFS_CFLAGS
) $(HOSTCFLAGS
)
423 KBUILD_HOSTCXXFLAGS
:= -Wall
-O2
$(HOST_LFS_CFLAGS
) $(HOSTCXXFLAGS
)
424 KBUILD_HOSTLDFLAGS
:= $(HOST_LFS_LDFLAGS
) $(HOSTLDFLAGS
)
425 KBUILD_HOSTLDLIBS
:= $(HOST_LFS_LIBS
) $(HOSTLDLIBS
)
427 # Make variables (CC, etc...)
434 OBJCOPY
= llvm-objcopy
435 OBJDUMP
= llvm-objdump
436 READELF
= llvm-readelf
440 CC
= $(CROSS_COMPILE
)gcc
441 LD
= $(CROSS_COMPILE
)ld
442 AR
= $(CROSS_COMPILE
)ar
443 NM
= $(CROSS_COMPILE
)nm
444 OBJCOPY
= $(CROSS_COMPILE
)objcopy
445 OBJDUMP
= $(CROSS_COMPILE
)objdump
446 READELF
= $(CROSS_COMPILE
)readelf
447 OBJSIZE
= $(CROSS_COMPILE
)size
448 STRIP
= $(CROSS_COMPILE
)strip
454 INSTALLKERNEL
:= installkernel
455 DEPMOD
= /sbin
/depmod
468 # GZIP, BZIP2, LZOP env vars are used by the tools. Support them as the command
469 # line interface, but use _GZIP, _BZIP2, _LZOP internally.
474 # Reset GZIP, BZIP2, LZOP in this Makefile
479 # Reset GZIP, BZIP2, LZOP in recursive invocations
480 MAKEOVERRIDES
+= GZIP
= BZIP2
= LZOP
=
482 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
483 -Wbitwise
-Wno-return-void
-Wno-unknown-attribute
$(CF
)
492 # Use USERINCLUDE when you must reference the UAPI directories only.
494 -I
$(srctree
)/arch
/$(SRCARCH
)/include/uapi \
495 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated
/uapi \
496 -I
$(srctree
)/include/uapi \
497 -I
$(objtree
)/include/generated
/uapi \
498 -include $(srctree
)/include/linux
/kconfig.h
500 # Use LINUXINCLUDE when you must reference the include/ directory.
501 # Needed to be compatible with the O= option
503 -I
$(srctree
)/arch
/$(SRCARCH
)/include \
504 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated \
505 $(if
$(building_out_of_srctree
),-I
$(srctree
)/include) \
506 -I
$(objtree
)/include \
509 KBUILD_AFLAGS
:= -D__ASSEMBLY__
-fno-PIE
510 KBUILD_CFLAGS
:= -Wall
-Wundef
-Werror
=strict-prototypes
-Wno-trigraphs \
511 -fno-strict-aliasing
-fno-common
-fshort-wchar
-fno-PIE \
512 -Werror
=implicit-function-declaration
-Werror
=implicit-int \
513 -Wno-format-security \
515 KBUILD_CPPFLAGS
:= -D__KERNEL__
516 KBUILD_AFLAGS_KERNEL
:=
517 KBUILD_CFLAGS_KERNEL
:=
518 KBUILD_AFLAGS_MODULE
:= -DMODULE
519 KBUILD_CFLAGS_MODULE
:= -DMODULE
520 KBUILD_LDFLAGS_MODULE
:=
521 export KBUILD_LDS_MODULE
:= $(srctree
)/scripts
/module-common.lds
523 GCC_PLUGINS_CFLAGS
:=
526 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
527 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
528 export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
529 export _GZIP _BZIP2 _LZOP LZMA LZ4 XZ
530 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
532 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
533 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
534 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KCSAN
535 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
536 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
537 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
539 # Files to ignore in find ... statements
541 export RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o \
542 -name CVS
-o
-name .
pc -o
-name .hg
-o
-name .git \
) \
544 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
545 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
547 # ===========================================================================
548 # Rules shared between *config targets and build targets
550 # Basic helpers built in scripts/basic/
551 PHONY
+= scripts_basic
553 $(Q
)$(MAKE
) $(build
)=scripts
/basic
554 $(Q
)rm -f .tmp_quiet_recordmcount
556 PHONY
+= outputmakefile
557 # Before starting out-of-tree build, make sure the source tree is clean.
558 # outputmakefile generates a Makefile in the output directory, if using a
559 # separate output directory. This allows convenient use of make in the
561 # At the same time when output Makefile generated, generate .gitignore to
562 # ignore whole output directory
564 ifdef building_out_of_srctree
565 $(Q
)if
[ -f
$(srctree
)/.config
-o \
566 -d
$(srctree
)/include/config
-o \
567 -d
$(srctree
)/arch
/$(SRCARCH
)/include/generated
]; then \
569 echo
>&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
570 echo
>&2 "*** in $(abs_srctree)";\
574 $(Q
)ln
-fsn
$(srctree
) source
575 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile
$(srctree
)
576 $(Q
)test -e .gitignore || \
577 { echo
"# this is build directory, ignore it"; echo
"*"; } > .gitignore
580 ifneq ($(shell $(CC
) --version
2>&1 | head
-n
1 | grep clang
),)
581 ifneq ($(CROSS_COMPILE
),)
582 CLANG_FLAGS
+= --target
=$(notdir $(CROSS_COMPILE
:%-=%))
583 GCC_TOOLCHAIN_DIR
:= $(dir $(shell which
$(CROSS_COMPILE
)elfedit
))
584 CLANG_FLAGS
+= --prefix=$(GCC_TOOLCHAIN_DIR
)
585 GCC_TOOLCHAIN
:= $(realpath
$(GCC_TOOLCHAIN_DIR
)/..
)
587 ifneq ($(GCC_TOOLCHAIN
),)
588 CLANG_FLAGS
+= --gcc-toolchain
=$(GCC_TOOLCHAIN
)
590 ifneq ($(LLVM_IAS
),1)
591 CLANG_FLAGS
+= -no-integrated-as
593 CLANG_FLAGS
+= -Werror
=unknown-warning-option
594 KBUILD_CFLAGS
+= $(CLANG_FLAGS
)
595 KBUILD_AFLAGS
+= $(CLANG_FLAGS
)
599 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
600 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
601 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
602 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
603 CC_VERSION_TEXT
= $(shell $(CC
) --version
2>/dev
/null | head
-n
1)
606 # ===========================================================================
607 # *config targets only - make sure prerequisites are updated, and descend
608 # in scripts/kconfig to make the *config target
610 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
611 # KBUILD_DEFCONFIG may point out an alternative default configuration
612 # used for 'make defconfig'
613 include arch
/$(SRCARCH
)/Makefile
614 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
616 config
: outputmakefile scripts_basic FORCE
617 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
619 %config
: outputmakefile scripts_basic FORCE
620 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
623 # ===========================================================================
624 # Build targets only - this includes vmlinux, arch specific targets, clean
625 # targets and others. In general all targets except *config targets.
627 # If building an external module we do not care about the all: rule
628 # but instead __all depend on modules
630 ifeq ($(KBUILD_EXTMOD
),)
636 # Decide whether to build built-in, modular, or both.
637 # Normally, just do built-in.
642 # If we have only "make modules", don't compile built-in objects.
643 ifeq ($(MAKECMDGOALS
),modules
)
647 # If we have "make <whatever> modules", compile modules
648 # in addition to whatever we do anyway.
649 # Just "make" or "make all" shall build modules as well
651 ifneq ($(filter all modules nsdeps
,$(MAKECMDGOALS
)),)
655 ifeq ($(MAKECMDGOALS
),)
659 export KBUILD_MODULES KBUILD_BUILTIN
662 include include/config
/auto.conf
665 ifeq ($(KBUILD_EXTMOD
),)
666 # Objects we will link into vmlinux / subdirs we need to visit
668 drivers-y
:= drivers
/ sound
/
669 drivers-
$(CONFIG_SAMPLES
) += samples
/
670 drivers-y
+= net
/ virt
/
672 endif # KBUILD_EXTMOD
674 # The all: target is the default when no target is given on the
676 # This allow a user to issue only 'make' to build a kernel including modules
677 # Defaults to vmlinux, but the arch makefile usually adds further targets
680 CFLAGS_GCOV
:= -fprofile-arcs
-ftest-coverage \
681 $(call cc-option
,-fno-tree-loop-im
) \
682 $(call cc-disable-warning
,maybe-uninitialized
,)
685 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
686 ifdef CONFIG_FUNCTION_TRACER
687 CC_FLAGS_FTRACE
:= -pg
690 RETPOLINE_CFLAGS_GCC
:= -mindirect-branch
=thunk-extern
-mindirect-branch-register
691 RETPOLINE_VDSO_CFLAGS_GCC
:= -mindirect-branch
=thunk-inline
-mindirect-branch-register
692 RETPOLINE_CFLAGS_CLANG
:= -mretpoline-external-thunk
693 RETPOLINE_VDSO_CFLAGS_CLANG
:= -mretpoline
694 RETPOLINE_CFLAGS
:= $(call cc-option
,$(RETPOLINE_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_CFLAGS_CLANG
)))
695 RETPOLINE_VDSO_CFLAGS
:= $(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_CLANG
)))
696 export RETPOLINE_CFLAGS
697 export RETPOLINE_VDSO_CFLAGS
699 include arch
/$(SRCARCH
)/Makefile
702 ifdef may-sync-config
703 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
704 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
705 # because some architectures define CROSS_COMPILE there.
706 include include/config
/auto.conf.cmd
710 @echo
>&2 '*** Configuration file "$@" not found!'
712 @echo
>&2 '*** Please run some configurator (e.g. "make oldconfig" or'
713 @echo
>&2 '*** "make menuconfig" or "make xconfig").'
717 # The actual configuration files used during the build are stored in
718 # include/generated/ and include/config/. Update them if .config is newer than
719 # include/config/auto.conf (which mirrors .config).
721 # This exploits the 'multi-target pattern rule' trick.
722 # The syncconfig should be executed only once to make all the targets.
723 # (Note: use the grouped target '&:' when we bump to GNU Make 4.3)
724 %/config
/auto.conf
%/config
/auto.conf.cmd
%/generated
/autoconf.h
: $(KCONFIG_CONFIG
)
725 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile syncconfig
726 else # !may-sync-config
727 # External modules and some install targets need include/generated/autoconf.h
728 # and include/config/auto.conf but do not care if they are up-to-date.
729 # Use auto.conf to trigger the test
730 PHONY
+= include/config
/auto.conf
732 include/config
/auto.conf
:
733 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
735 echo
>&2 " ERROR: Kernel configuration is invalid."; \
736 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
737 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
741 endif # may-sync-config
744 KBUILD_CFLAGS
+= $(call cc-option
,-fno-delete-null-pointer-checks
,)
745 KBUILD_CFLAGS
+= $(call cc-disable-warning
,frame-address
,)
746 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-truncation
)
747 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-overflow
)
748 KBUILD_CFLAGS
+= $(call cc-disable-warning
, address-of-packed-member
)
750 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
752 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
754 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
758 # Tell gcc to never replace conditional load with a non-conditional one
759 KBUILD_CFLAGS
+= $(call cc-option
,--param
=allow-store-data-races
=0)
760 KBUILD_CFLAGS
+= $(call cc-option
,-fno-allow-store-data-races
)
762 include scripts
/Makefile.kcov
763 include scripts
/Makefile.gcc-plugins
765 ifdef CONFIG_READABLE_ASM
766 # Disable optimizations that make assembler listings hard to read.
767 # reorder blocks reorders the control in the function
768 # ipa clone creates specialized cloned functions
769 # partial inlining inlines only parts of functions
770 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
771 $(call cc-option
,-fno-ipa-cp-clone
,) \
772 $(call cc-option
,-fno-partial-inlining
)
775 ifneq ($(CONFIG_FRAME_WARN
),0)
776 KBUILD_CFLAGS
+= -Wframe-larger-than
=$(CONFIG_FRAME_WARN
)
779 stackp-flags-
$(CONFIG_CC_HAS_STACKPROTECTOR_NONE
) := -fno-stack-protector
780 stackp-flags-
$(CONFIG_STACKPROTECTOR
) := -fstack-protector
781 stackp-flags-
$(CONFIG_STACKPROTECTOR_STRONG
) := -fstack-protector-strong
783 KBUILD_CFLAGS
+= $(stackp-flags-y
)
785 ifdef CONFIG_CC_IS_CLANG
786 KBUILD_CPPFLAGS
+= -Qunused-arguments
787 KBUILD_CFLAGS
+= -Wno-format-invalid-specifier
788 KBUILD_CFLAGS
+= -Wno-gnu
789 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
790 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
791 # See modpost pattern 2
792 KBUILD_CFLAGS
+= -mno-global-merge
795 # These warnings generated too much noise in a regular build.
796 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
797 KBUILD_CFLAGS
+= -Wno-unused-but-set-variable
799 # Warn about unmarked fall-throughs in switch statement.
800 # Disabled for clang while comment to attribute conversion happens and
801 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
802 KBUILD_CFLAGS
+= $(call cc-option
,-Wimplicit-fallthrough
,)
805 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-const-variable
)
806 ifdef CONFIG_FRAME_POINTER
807 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
809 # Some targets (ARM with Thumb2, for example), can't be built with frame
810 # pointers. For those, we don't have FUNCTION_TRACER automatically
811 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
812 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
813 # -fomit-frame-pointer with FUNCTION_TRACER.
814 ifndef CONFIG_FUNCTION_TRACER
815 KBUILD_CFLAGS
+= -fomit-frame-pointer
819 # Initialize all stack variables with a pattern, if desired.
820 ifdef CONFIG_INIT_STACK_ALL
821 KBUILD_CFLAGS
+= -ftrivial-auto-var-init
=pattern
824 DEBUG_CFLAGS
:= $(call cc-option
, -fno-var-tracking-assignments
)
826 ifdef CONFIG_DEBUG_INFO
827 ifdef CONFIG_DEBUG_INFO_SPLIT
828 DEBUG_CFLAGS
+= -gsplit-dwarf
832 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
+= -Wa
,--compress-debug-sections
=zlib
846 KBUILD_LDFLAGS
+= --compress-debug-sections
=zlib
849 KBUILD_CFLAGS
+= $(DEBUG_CFLAGS
)
852 ifdef CONFIG_FUNCTION_TRACER
853 ifdef CONFIG_FTRACE_MCOUNT_RECORD
854 # gcc 5 supports generating the mcount tables directly
855 ifeq ($(call cc-option-yn
,-mrecord-mcount
),y
)
856 CC_FLAGS_FTRACE
+= -mrecord-mcount
857 export CC_USING_RECORD_MCOUNT
:= 1
859 ifdef CONFIG_HAVE_NOP_MCOUNT
860 ifeq ($(call cc-option-yn
, -mnop-mcount
),y
)
861 CC_FLAGS_FTRACE
+= -mnop-mcount
862 CC_FLAGS_USING
+= -DCC_USING_NOP_MCOUNT
866 ifdef CONFIG_HAVE_FENTRY
867 ifeq ($(call cc-option-yn
, -mfentry
),y
)
868 CC_FLAGS_FTRACE
+= -mfentry
869 CC_FLAGS_USING
+= -DCC_USING_FENTRY
872 export CC_FLAGS_FTRACE
873 KBUILD_CFLAGS
+= $(CC_FLAGS_FTRACE
) $(CC_FLAGS_USING
)
874 KBUILD_AFLAGS
+= $(CC_FLAGS_USING
)
875 ifdef CONFIG_DYNAMIC_FTRACE
876 ifdef CONFIG_HAVE_C_RECORDMCOUNT
877 BUILD_C_RECORDMCOUNT
:= y
878 export BUILD_C_RECORDMCOUNT
883 # We trigger additional mismatches with less inlining
884 ifdef CONFIG_DEBUG_SECTION_MISMATCH
885 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
888 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
889 KBUILD_CFLAGS_KERNEL
+= -ffunction-sections
-fdata-sections
890 LDFLAGS_vmlinux
+= --gc-sections
893 ifdef CONFIG_LIVEPATCH
894 KBUILD_CFLAGS
+= $(call cc-option
, -flive-patching
=inline-clone
)
897 ifdef CONFIG_SHADOW_CALL_STACK
898 CC_FLAGS_SCS
:= -fsanitize
=shadow-call-stack
899 KBUILD_CFLAGS
+= $(CC_FLAGS_SCS
)
903 # arch Makefile may override CC so keep this after arch Makefile is included
904 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
906 # warn about C99 declaration after statement
907 KBUILD_CFLAGS
+= -Wdeclaration-after-statement
909 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
910 KBUILD_CFLAGS
+= -Wvla
912 # disable pointer signed / unsigned warnings in gcc 4.0
913 KBUILD_CFLAGS
+= -Wno-pointer-sign
915 # disable stringop warnings in gcc 8+
916 KBUILD_CFLAGS
+= $(call cc-disable-warning
, stringop-truncation
)
918 # We'll want to enable this eventually, but it's not going away for 5.7 at least
919 KBUILD_CFLAGS
+= $(call cc-disable-warning
, zero-length-bounds
)
920 KBUILD_CFLAGS
+= $(call cc-disable-warning
, array-bounds
)
921 KBUILD_CFLAGS
+= $(call cc-disable-warning
, stringop-overflow
)
923 # Another good warning that we'll want to enable eventually
924 KBUILD_CFLAGS
+= $(call cc-disable-warning
, restrict
)
926 # Enabled with W=2, disabled by default as noisy
927 KBUILD_CFLAGS
+= $(call cc-disable-warning
, maybe-uninitialized
)
929 # disable invalid "can't wrap" optimizations for signed / pointers
930 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
932 # clang sets -fmerge-all-constants by default as optimization, but this
933 # is non-conforming behavior for C and in fact breaks the kernel, so we
934 # need to disable it here generally.
935 KBUILD_CFLAGS
+= $(call cc-option
,-fno-merge-all-constants
)
937 # for gcc -fno-merge-all-constants disables everything, but it is fine
938 # to have actual conforming behavior enabled.
939 KBUILD_CFLAGS
+= $(call cc-option
,-fmerge-constants
)
941 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
942 KBUILD_CFLAGS
+= $(call cc-option
,-fno-stack-check
,)
944 # conserve stack if available
945 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
947 # Prohibit date/time macros, which would make the build non-deterministic
948 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=date-time
)
950 # enforce correct pointer usage
951 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=incompatible-pointer-types
)
953 # Require designated initializers for all marked structures
954 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=designated-init
)
956 # change __FILE__ to the relative path from the srctree
957 KBUILD_CFLAGS
+= $(call cc-option
,-fmacro-prefix-map
=$(srctree
)/=)
959 # ensure -fcf-protection is disabled when using retpoline as it is
960 # incompatible with -mindirect-branch=thunk-extern
961 ifdef CONFIG_RETPOLINE
962 KBUILD_CFLAGS
+= $(call cc-option
,-fcf-protection
=none
)
965 include scripts
/Makefile.kasan
966 include scripts
/Makefile.extrawarn
967 include scripts
/Makefile.ubsan
968 include scripts
/Makefile.kcsan
970 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
971 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
972 KBUILD_AFLAGS
+= $(KAFLAGS
)
973 KBUILD_CFLAGS
+= $(KCFLAGS
)
975 KBUILD_LDFLAGS_MODULE
+= --build-id
976 LDFLAGS_vmlinux
+= --build-id
978 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
979 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
982 ifeq ($(CONFIG_RELR
),y
)
983 LDFLAGS_vmlinux
+= --pack-dyn-relocs
=relr
986 # Align the bit size of userspace programs with the kernel
987 KBUILD_USERCFLAGS
+= $(filter -m32
-m64
, $(KBUILD_CFLAGS
))
988 KBUILD_USERLDFLAGS
+= $(filter -m32
-m64
, $(KBUILD_CFLAGS
))
990 # make the checker run with the right architecture
991 CHECKFLAGS
+= --arch
=$(ARCH
)
993 # insure the checker run with the right endianness
994 CHECKFLAGS
+= $(if
$(CONFIG_CPU_BIG_ENDIAN
),-mbig-endian
,-mlittle-endian
)
996 # the checker needs the correct machine size
997 CHECKFLAGS
+= $(if
$(CONFIG_64BIT
),-m64
,-m32
)
999 # Default kernel image to build when no specific target is given.
1000 # KBUILD_IMAGE may be overruled on the command line or
1001 # set in the environment
1002 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
1003 # this default value
1004 export KBUILD_IMAGE ?
= vmlinux
1007 # INSTALL_PATH specifies where to place the updated kernel and system map
1008 # images. Default is /boot, but you can set it to other values
1009 export INSTALL_PATH ?
= /boot
1012 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
1013 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
1014 # an argument if needed. Otherwise it defaults to the kernel install path
1016 export INSTALL_DTBS_PATH ?
= $(INSTALL_PATH
)/dtbs
/$(KERNELRELEASE
)
1019 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
1020 # relocations required by build roots. This is not defined in the
1021 # makefile but the argument can be passed to make if needed.
1024 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
1028 # INSTALL_MOD_STRIP, if defined, will cause modules to be
1029 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
1030 # the default option --strip-debug will be used. Otherwise,
1031 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
1033 ifdef INSTALL_MOD_STRIP
1034 ifeq ($(INSTALL_MOD_STRIP
),1)
1035 mod_strip_cmd
= $(STRIP
) --strip-debug
1037 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
1038 endif # INSTALL_MOD_STRIP=1
1040 mod_strip_cmd
= true
1041 endif # INSTALL_MOD_STRIP
1042 export mod_strip_cmd
1044 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
1045 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
1046 # or CONFIG_MODULE_COMPRESS_XZ.
1048 mod_compress_cmd
= true
1049 ifdef CONFIG_MODULE_COMPRESS
1050 ifdef CONFIG_MODULE_COMPRESS_GZIP
1051 mod_compress_cmd
= $(_GZIP
) -n
-f
1052 endif # CONFIG_MODULE_COMPRESS_GZIP
1053 ifdef CONFIG_MODULE_COMPRESS_XZ
1054 mod_compress_cmd
= $(XZ
) -f
1055 endif # CONFIG_MODULE_COMPRESS_XZ
1056 endif # CONFIG_MODULE_COMPRESS
1057 export mod_compress_cmd
1059 ifdef CONFIG_MODULE_SIG_ALL
1060 $(eval
$(call config_filename
,MODULE_SIG_KEY
))
1062 mod_sign_cmd
= scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODULE_SIG_KEY_SRCPREFIX
)$(CONFIG_MODULE_SIG_KEY
) certs
/signing_key.x509
1068 HOST_LIBELF_LIBS
= $(shell pkg-config libelf
--libs
2>/dev
/null || echo
-lelf
)
1070 ifdef CONFIG_STACK_VALIDATION
1071 has_libelf
:= $(call try-run
,\
1072 echo
"int main() {}" |
$(HOSTCC
) -xc
-o
/dev
/null
$(HOST_LIBELF_LIBS
) -,1,0)
1073 ifeq ($(has_libelf
),1)
1074 objtool_target
:= tools
/objtool FORCE
1076 SKIP_STACK_VALIDATION
:= 1
1077 export SKIP_STACK_VALIDATION
1083 export MODORDER
:= $(extmod-prefix
)modules.order
1084 export MODULES_NSDEPS
:= $(extmod-prefix
)modules.nsdeps
1086 ifeq ($(KBUILD_EXTMOD
),)
1087 core-y
+= kernel
/ certs
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
1089 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, \
1090 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
1091 $(libs-y
) $(libs-m
)))
1093 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) Documentation \
1094 $(patsubst %/,%,$(filter %/, $(core-
) \
1095 $(drivers-
) $(libs-
))))
1097 subdir-modorder
:= $(addsuffix modules.order
,$(filter %/, \
1098 $(core-y
) $(core-m
) $(libs-y
) $(libs-m
) \
1099 $(drivers-y
) $(drivers-m
)))
1101 build-dirs
:= $(vmlinux-dirs
)
1102 clean-dirs
:= $(vmlinux-alldirs
)
1104 # Externally visible symbols (used by link-vmlinux.sh)
1105 KBUILD_VMLINUX_OBJS
:= $(head-y
) $(patsubst %/,%/built-in.a
, $(core-y
))
1106 KBUILD_VMLINUX_OBJS
+= $(addsuffix built-in.a
, $(filter %/, $(libs-y
)))
1107 ifdef CONFIG_MODULES
1108 KBUILD_VMLINUX_OBJS
+= $(patsubst %/, %/lib.a
, $(filter %/, $(libs-y
)))
1109 KBUILD_VMLINUX_LIBS
:= $(filter-out %/, $(libs-y
))
1111 KBUILD_VMLINUX_LIBS
:= $(patsubst %/,%/lib.a
, $(libs-y
))
1113 KBUILD_VMLINUX_OBJS
+= $(patsubst %/,%/built-in.a
, $(drivers-y
))
1115 export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
1116 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
1117 export LDFLAGS_vmlinux
1118 # used by scripts/Makefile.package
1119 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) LICENSES arch
include scripts tools
)
1121 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_OBJS
) $(KBUILD_VMLINUX_LIBS
)
1123 # Recurse until adjust_autoksyms.sh is satisfied
1124 PHONY
+= autoksyms_recursive
1125 ifdef CONFIG_TRIM_UNUSED_KSYMS
1126 # For the kernel to actually contain only the needed exported symbols,
1127 # we have to build modules as well to determine what those symbols are.
1128 # (this can be evaluated only once include/config/auto.conf has been included)
1131 autoksyms_recursive
: descend modules.order
1132 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/adjust_autoksyms.sh \
1133 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1136 autoksyms_h
:= $(if
$(CONFIG_TRIM_UNUSED_KSYMS
), include/generated
/autoksyms.h
)
1138 quiet_cmd_autoksyms_h
= GEN
$@
1139 cmd_autoksyms_h
= mkdir
-p
$(dir $@
); \
1140 $(CONFIG_SHELL
) $(srctree
)/scripts
/gen_autoksyms.sh
$@
1143 $(call cmd
,autoksyms_h
)
1145 ARCH_POSTLINK
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/Makefile.postlink
)
1147 # Final link of vmlinux with optional arch pass after final link
1148 cmd_link-vmlinux
= \
1149 $(CONFIG_SHELL
) $< $(LD
) $(KBUILD_LDFLAGS
) $(LDFLAGS_vmlinux
) ; \
1150 $(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) $@
, true
)
1152 vmlinux
: scripts
/link-vmlinux.sh autoksyms_recursive
$(vmlinux-deps
) FORCE
1153 +$(call if_changed
,link-vmlinux
)
1157 # The actual objects are generated when descending,
1158 # make sure no implicit rule kicks in
1159 $(sort $(vmlinux-deps
) $(subdir-modorder
)): descend
;
1161 filechk_kernel.release
= \
1162 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1164 # Store (new) KERNELRELEASE string in include/config/kernel.release
1165 include/config
/kernel.release
: FORCE
1166 $(call filechk
,kernel.release
)
1168 # Additional helpers built in scripts/
1169 # Carefully list dependencies so we do not try to build scripts twice
1172 scripts
: scripts_basic scripts_dtc
1173 $(Q
)$(MAKE
) $(build
)=$(@
)
1175 # Things we need to do before we recursively start building the kernel
1176 # or the modules are listed in "prepare".
1177 # A multi level approach is used. prepareN is processed before prepareN-1.
1178 # archprepare is used in arch Makefiles and when processed asm symlink,
1179 # version.h and scripts_basic is processed / created.
1181 PHONY
+= prepare archprepare
1183 archprepare
: outputmakefile archheaders archscripts scripts
include/config
/kernel.release \
1184 asm-generic
$(version_h
) $(autoksyms_h
) include/generated
/utsrelease.h \
1185 include/generated
/autoconf.h
1187 prepare0
: archprepare
1188 $(Q
)$(MAKE
) $(build
)=scripts
/mod
1189 $(Q
)$(MAKE
) $(build
)=.
1191 # All the preparing..
1192 prepare
: prepare0 prepare-objtool
1194 # Support for using generic headers in asm-generic
1195 asm-generic
:= -f
$(srctree
)/scripts
/Makefile.asm-generic obj
1197 PHONY
+= asm-generic uapi-asm-generic
1198 asm-generic
: uapi-asm-generic
1199 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/asm \
1200 generic
=include/asm-generic
1202 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/uapi
/asm \
1203 generic
=include/uapi
/asm-generic
1205 PHONY
+= prepare-objtool
1206 prepare-objtool
: $(objtool_target
)
1207 ifeq ($(SKIP_STACK_VALIDATION
),1)
1208 ifdef CONFIG_UNWINDER_ORC
1209 @echo
"error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1212 @echo
"warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1216 # Generate some files
1217 # ---------------------------------------------------------------------------
1219 # KERNELRELEASE can change from a few different places, meaning version.h
1220 # needs to be updated, so this check is forced on all builds
1223 define filechk_utsrelease.h
1224 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1225 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1228 echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"
1231 define filechk_version.h
1232 echo \
#define LINUX_VERSION_CODE $(shell \
1233 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
1234 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1238 $(call filechk
,version.h
)
1239 $(Q
)rm -f
$(old_version_h
)
1241 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1242 $(call filechk
,utsrelease.h
)
1246 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
1247 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
1249 # ---------------------------------------------------------------------------
1252 #Default location for installed headers
1253 export INSTALL_HDR_PATH
= $(objtree
)/usr
1255 quiet_cmd_headers_install
= INSTALL
$(INSTALL_HDR_PATH
)/include
1256 cmd_headers_install
= \
1257 mkdir
-p
$(INSTALL_HDR_PATH
); \
1258 rsync
-mrl
--include='*/' --include='*\.h' --exclude
='*' \
1259 usr
/include $(INSTALL_HDR_PATH
)
1261 PHONY
+= headers_install
1262 headers_install
: headers
1263 $(call cmd
,headers_install
)
1265 PHONY
+= archheaders archscripts
1267 hdr-inst
:= -f
$(srctree
)/scripts
/Makefile.headersinst obj
1270 headers
: $(version_h
) scripts_unifdef uapi-asm-generic archheaders archscripts
1271 $(if
$(wildcard $(srctree
)/arch
/$(SRCARCH
)/include/uapi
/asm
/Kbuild
),, \
1272 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1273 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi
1274 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(SRCARCH
)/include/uapi
1276 # Deprecated. It is no-op now.
1277 PHONY
+= headers_check
1281 ifdef CONFIG_HEADERS_INSTALL
1285 PHONY
+= scripts_unifdef
1286 scripts_unifdef
: scripts_basic
1287 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1289 # ---------------------------------------------------------------------------
1294 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests run_tests
1297 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests
$*
1299 PHONY
+= kselftest-merge
1301 $(if
$(wildcard $(objtree
)/.config
),, $(error No .config exists
, config your kernel first
!))
1302 $(Q
)find
$(srctree
)/tools
/testing
/selftests
-name config | \
1303 xargs
$(srctree
)/scripts
/kconfig
/merge_config.sh
-m
$(objtree
)/.config
1304 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile olddefconfig
1306 # ---------------------------------------------------------------------------
1309 ifneq ($(wildcard $(srctree
)/arch
/$(SRCARCH
)/boot
/dts
/),)
1310 dtstree
:= arch
/$(SRCARCH
)/boot
/dts
1315 %.dtb
: include/config
/kernel.release scripts_dtc
1316 $(Q
)$(MAKE
) $(build
)=$(dtstree
) $(dtstree
)/$@
1318 PHONY
+= dtbs dtbs_install dtbs_check
1319 dtbs
: include/config
/kernel.release scripts_dtc
1320 $(Q
)$(MAKE
) $(build
)=$(dtstree
)
1322 ifneq ($(filter dtbs_check
, $(MAKECMDGOALS
)),)
1324 dtbs
: dt_binding_check
1330 $(Q
)$(MAKE
) $(dtbinst
)=$(dtstree
) dst
=$(INSTALL_DTBS_PATH
)
1332 ifdef CONFIG_OF_EARLY_FLATTREE
1338 PHONY
+= scripts_dtc
1339 scripts_dtc
: scripts_basic
1340 $(Q
)$(MAKE
) $(build
)=scripts
/dtc
1342 ifneq ($(filter dt_binding_check
, $(MAKECMDGOALS
)),)
1343 export CHECK_DT_BINDING
=y
1346 PHONY
+= dt_binding_check
1347 dt_binding_check
: scripts_dtc
1348 $(Q
)$(MAKE
) $(build
)=Documentation
/devicetree
/bindings
1350 # ---------------------------------------------------------------------------
1353 # install modules.builtin regardless of CONFIG_MODULES
1354 PHONY
+= _builtin_inst_
1356 @mkdir
-p
$(MODLIB
)/
1357 @cp
-f modules.builtin
$(MODLIB
)/
1358 @cp
-f
$(objtree
)/modules.builtin.modinfo
$(MODLIB
)/
1361 install: _builtin_inst_
1363 ifdef CONFIG_MODULES
1365 # By default, build modules as well
1369 # When we're building modules with modversions, we need to consider
1370 # the built-in objects during the descend as well, in order to
1371 # make sure the checksums are up to date before we record them.
1372 ifdef CONFIG_MODVERSIONS
1378 # A module can be listed more than once in obj-m resulting in
1379 # duplicate lines in modules.order files. Those are removed
1380 # using awk while concatenating to the final file.
1383 modules
: $(if
$(KBUILD_BUILTIN
),vmlinux
) modules_check
1384 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1386 PHONY
+= modules_check
1387 modules_check
: modules.order
1388 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/modules-check.sh
$<
1390 cmd_modules_order
= $(AWK
) '!x[$$0]++' $(real-prereqs
) > $@
1392 modules.order
: $(subdir-modorder
) FORCE
1393 $(call if_changed
,modules_order
)
1395 targets
+= modules.order
1397 # Target to prepare building external modules
1398 PHONY
+= modules_prepare
1399 modules_prepare
: prepare
1401 # Target to install modules
1402 PHONY
+= modules_install
1403 modules_install
: _modinst_ _modinst_post
1406 _modinst_
: _builtin_inst_
1407 @
rm -rf
$(MODLIB
)/kernel
1408 @
rm -f
$(MODLIB
)/source
1409 @mkdir
-p
$(MODLIB
)/kernel
1410 @ln
-s
$(abspath
$(srctree
)) $(MODLIB
)/source
1411 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1412 rm -f
$(MODLIB
)/build
; \
1413 ln
-s
$(CURDIR
) $(MODLIB
)/build
; \
1415 @sed
's:^:kernel/:' modules.order
> $(MODLIB
)/modules.order
1416 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1418 # This depmod is only for convenience to give the initial
1419 # boot a modules.dep even before / is mounted read-write. However the
1420 # boot script depmod is the master version.
1421 PHONY
+= _modinst_post
1422 _modinst_post
: _modinst_
1425 ifeq ($(CONFIG_MODULE_SIG
), y
)
1426 PHONY
+= modules_sign
1428 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1431 else # CONFIG_MODULES
1433 # Modules not configured
1434 # ---------------------------------------------------------------------------
1436 PHONY
+= modules modules_install
1437 modules modules_install
:
1439 @echo
>&2 "The present kernel configuration has modules disabled."
1440 @echo
>&2 "Type 'make config' and enable loadable module support."
1441 @echo
>&2 "Then build a kernel with module support enabled."
1445 endif # CONFIG_MODULES
1448 # Cleaning is done on three levels.
1449 # make clean Delete most generated files
1450 # Leave enough to build external modules
1451 # make mrproper Delete the current configuration, and all generated files
1452 # make distclean Remove editor backup files, patch leftover files and the like
1454 # Directories & files removed with 'make clean'
1455 CLEAN_FILES
+= include/ksym vmlinux.symvers \
1456 modules.builtin modules.builtin.modinfo modules.nsdeps
1458 # Directories & files removed with 'make mrproper'
1459 MRPROPER_FILES
+= include/config
include/generated \
1460 arch
/$(SRCARCH
)/include/generated .tmp_objdiff \
1461 debian snap tar-install \
1462 .config .config.old .version \
1464 signing_key.pem signing_key.priv signing_key.x509 \
1465 x509.genkey extra_certificates signing_key.x509.keyid \
1466 signing_key.x509.signer vmlinux-gdb.py \
1469 # Directories & files removed with 'make distclean'
1470 DISTCLEAN_FILES
+= tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS
1472 # clean - Delete most, but leave enough to build external modules
1474 clean: rm-files
:= $(CLEAN_FILES
)
1476 PHONY
+= archclean vmlinuxclean
1479 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1480 $(Q
)$(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) clean)
1482 clean: archclean vmlinuxclean
1484 # mrproper - Delete all generated files, including .config
1486 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1487 mrproper-dirs
:= $(addprefix _mrproper_
,scripts
)
1489 PHONY
+= $(mrproper-dirs
) mrproper
1491 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1493 mrproper
: clean $(mrproper-dirs
)
1498 distclean: rm-files
:= $(wildcard $(DISTCLEAN_FILES
))
1504 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1505 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1506 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'*%' \
1507 -o
-name
'core' \
) \
1508 -type f
-print | xargs
rm -f
1511 # Packaging of the kernel to various formats
1512 # ---------------------------------------------------------------------------
1515 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package
$@
1516 %pkg
: include/config
/kernel.release FORCE
1517 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package
$@
1519 # Brief documentation of the typical targets used
1520 # ---------------------------------------------------------------------------
1522 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1523 boards
:= $(sort $(notdir $(boards
)))
1524 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1525 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1529 @echo
'Cleaning targets:'
1530 @echo
' clean - Remove most generated files but keep the config and'
1531 @echo
' enough build support to build external modules'
1532 @echo
' mrproper - Remove all generated files + config + various backup files'
1533 @echo
' distclean - mrproper + remove editor backup and patch files'
1535 @echo
'Configuration targets:'
1536 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1538 @echo
'Other generic targets:'
1539 @echo
' all - Build all targets marked with [*]'
1540 @echo
'* vmlinux - Build the bare kernel'
1541 @echo
'* modules - Build all modules'
1542 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1543 @echo
' dir/ - Build all files in dir and below'
1544 @echo
' dir/file.[ois] - Build specified target only'
1545 @echo
' dir/file.ll - Build the LLVM assembly file'
1546 @echo
' (requires compiler support for LLVM assembly generation)'
1547 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1548 @echo
' (requires a recent binutils and recent build (System.map))'
1549 @echo
' dir/file.ko - Build module including final link'
1550 @echo
' modules_prepare - Set up for building external modules'
1551 @echo
' tags/TAGS - Generate tags file for editors'
1552 @echo
' cscope - Generate cscope index'
1553 @echo
' gtags - Generate GNU GLOBAL index'
1554 @echo
' kernelrelease - Output the release version string (use with make -s)'
1555 @echo
' kernelversion - Output the version stored in Makefile (use with make -s)'
1556 @echo
' image_name - Output the image name (use with make -s)'
1557 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1558 echo
' (default: $(INSTALL_HDR_PATH))'; \
1560 @echo
'Static analysers:'
1561 @echo
' checkstack - Generate a list of stack hogs'
1562 @echo
' namespacecheck - Name space analysis on compiled kernel'
1563 @echo
' versioncheck - Sanity check on version.h usage'
1564 @echo
' includecheck - Check for duplicate included header files'
1565 @echo
' export_report - List the usages of all exported symbols'
1566 @echo
' headerdep - Detect inclusion cycles in headers'
1567 @echo
' coccicheck - Check with Coccinelle'
1570 @echo
' nsdeps - Generate missing symbol namespace dependencies'
1572 @echo
'Kernel selftest:'
1573 @echo
' kselftest - Build and run kernel selftest'
1574 @echo
' Build, install, and boot kernel before'
1575 @echo
' running kselftest on it'
1576 @echo
' Run as root for full coverage'
1577 @echo
' kselftest-all - Build kernel selftest'
1578 @echo
' kselftest-install - Build and install kernel selftest'
1579 @echo
' kselftest-clean - Remove all generated kselftest files'
1580 @echo
' kselftest-merge - Merge all the config dependencies of'
1581 @echo
' kselftest to existing .config.'
1584 echo
'Devicetree:'; \
1585 echo
'* dtbs - Build device tree blobs for enabled boards'; \
1586 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1587 echo
' dt_binding_check - Validate device tree binding documents'; \
1588 echo
' dtbs_check - Validate device tree source files';\
1591 @echo
'Userspace tools targets:'
1592 @echo
' use "make tools/help"'
1593 @echo
' or "cd tools; make help"'
1595 @echo
'Kernel packaging:'
1596 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package help
1598 @echo
'Documentation targets:'
1599 @
$(MAKE
) -f
$(srctree
)/Documentation
/Makefile dochelp
1601 @echo
'Architecture specific targets ($(SRCARCH)):'
1602 @
$(if
$(archhelp
),$(archhelp
),\
1603 echo
' No architecture specific help defined for $(SRCARCH)')
1606 $(foreach b
, $(boards
), \
1607 printf
" %-27s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1609 @
$(if
$(board-dirs
), \
1610 $(foreach b
, $(board-dirs
), \
1611 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1612 printf
" %-16s - Show all of the above\\n" help-boards
; \
1615 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1616 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1617 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1618 @echo
' make C=1 [targets] Check re-compiled c source with $$CHECK'
1619 @echo
' (sparse by default)'
1620 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1621 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1622 @echo
' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1623 @echo
' 1: warnings which may be relevant and do not occur too often'
1624 @echo
' 2: warnings which occur quite often but may still be relevant'
1625 @echo
' 3: more obscure warnings, can most likely be ignored'
1626 @echo
' Multiple levels can be combined with W=12 or W=123'
1628 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1629 @echo
'For further info see the ./README file'
1632 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1634 help-boards
: $(help-board-dirs
)
1636 boards-per-dir
= $(sort $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
)))
1638 $(help-board-dirs
): help-
%:
1639 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1640 @
$(if
$(boards-per-dir
), \
1641 $(foreach b
, $(boards-per-dir
), \
1642 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1646 # Documentation targets
1647 # ---------------------------------------------------------------------------
1648 DOC_TARGETS
:= xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1649 linkcheckdocs dochelp refcheckdocs
1650 PHONY
+= $(DOC_TARGETS
)
1652 $(Q
)$(MAKE
) $(build
)=Documentation
$@
1655 # ---------------------------------------------------------------------------
1657 PHONY
+= scripts_gdb
1658 scripts_gdb
: prepare0
1659 $(Q
)$(MAKE
) $(build
)=scripts
/gdb
1660 $(Q
)ln
-fsn
$(abspath
$(srctree
)/scripts
/gdb
/vmlinux-gdb.py
)
1662 ifdef CONFIG_GDB_SCRIPTS
1666 else # KBUILD_EXTMOD
1669 # External module support.
1670 # When building external modules the kernel used as basis is considered
1671 # read-only, and no consistency checks are made and the make
1672 # system is not used on the basis kernel. If updates are required
1673 # in the basis kernel ordinary make commands (without M=...) must
1676 # The following are the only valid targets when building external
1678 # make M=dir clean Delete all automatically generated files
1679 # make M=dir modules Make all modules in specified dir
1680 # make M=dir Same as 'make M=dir modules'
1681 # make M=dir modules_install
1682 # Install the modules built in the module directory
1683 # Assumes install directory is already created
1685 # We are always building modules
1688 build-dirs
:= $(KBUILD_EXTMOD
)
1691 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1693 PHONY
+= modules_install
1694 modules_install
: _emodinst_ _emodinst_post
1696 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1699 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1700 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1702 PHONY
+= _emodinst_post
1703 _emodinst_post
: _emodinst_
1706 clean-dirs
:= $(KBUILD_EXTMOD
)
1707 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
$(KBUILD_EXTMOD
)/modules.nsdeps
1711 @echo
' Building external modules.'
1712 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1714 @echo
' modules - default target, build the module(s)'
1715 @echo
' modules_install - install the module'
1716 @echo
' clean - remove generated files in module directory only'
1720 endif # KBUILD_EXTMOD
1723 # ---------------------------------------------------------------------------
1724 # To build individual files in subdirectories, you can do like this:
1726 # make foo/bar/baz.s
1728 # The supported suffixes for single-target are listed in 'single-targets'
1730 # To build only under specific subdirectories, you can do like this:
1736 # .ko is special because modpost is needed
1737 single-ko
:= $(sort $(filter %.ko
, $(MAKECMDGOALS
)))
1738 single-no-ko
:= $(sort $(patsubst %.ko
,%.mod
, $(MAKECMDGOALS
)))
1740 $(single-ko
): single_modpost
1742 $(single-no-ko
): descend
1745 ifeq ($(KBUILD_EXTMOD
),)
1746 # For the single build of in-tree modules, use a temporary file to avoid
1747 # the situation of modules_install installing an invalid modules.order.
1748 MODORDER
:= .modules.tmp
1751 PHONY
+= single_modpost
1752 single_modpost
: $(single-no-ko
)
1753 $(Q
){ $(foreach m
, $(single-ko
), echo
$(extmod-prefix
)$m;) } > $(MODORDER
)
1754 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1758 export KBUILD_SINGLE_TARGETS
:= $(addprefix $(extmod-prefix
), $(single-no-ko
))
1760 # trim unrelated directories
1761 build-dirs
:= $(foreach d
, $(build-dirs
), \
1762 $(if
$(filter $(d
)/%, $(KBUILD_SINGLE_TARGETS
)), $(d
)))
1766 ifndef CONFIG_MODULES
1770 # Handle descending into subdirectories listed in $(build-dirs)
1771 # Preset locale variables to speed up the build process. Limit locale
1772 # tweaks to this spot to avoid wrong language settings when running
1773 # make menuconfig etc.
1774 # Error messages still appears in the original language
1775 PHONY
+= descend
$(build-dirs
)
1776 descend
: $(build-dirs
)
1777 $(build-dirs
): prepare
1778 $(Q
)$(MAKE
) $(build
)=$@ \
1779 single-build
=$(if
$(filter-out $@
/, $(filter $@
/%, $(single-no-ko
))),1) \
1780 need-builtin
=1 need-modorder
=1
1782 clean-dirs
:= $(addprefix _clean_
, $(clean-dirs
))
1783 PHONY
+= $(clean-dirs
) clean
1785 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1787 clean: $(clean-dirs
)
1789 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1790 \
( -name
'*.[aios]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1792 -o
-name
'*.dtb' -o
-name
'*.dtb.S' -o
-name
'*.dt.yaml' \
1793 -o
-name
'*.dwo' -o
-name
'*.lst' \
1794 -o
-name
'*.su' -o
-name
'*.mod' \
1795 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1796 -o
-name
'*.lex.c' -o
-name
'*.tab.[ch]' \
1797 -o
-name
'*.asn1.[ch]' \
1798 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1799 -o
-name
'.tmp_*.o.*' \
1800 -o
-name
'*.c.[012]*.*' \
1802 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1804 # Generate tags for editors
1805 # ---------------------------------------------------------------------------
1806 quiet_cmd_tags
= GEN
$@
1807 cmd_tags
= $(BASH
) $(srctree
)/scripts
/tags.sh
$@
1809 tags TAGS cscope gtags
: FORCE
1812 # Script to generate missing namespace dependencies
1813 # ---------------------------------------------------------------------------
1816 nsdeps
: export KBUILD_NSDEPS
=1
1818 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/nsdeps
1820 # Scripts to check various things for consistency
1821 # ---------------------------------------------------------------------------
1823 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1826 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1827 -name
'*.[hcS]' -type f
-print |
sort \
1828 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1831 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1832 -name
'*.[hcS]' -type f
-print |
sort \
1833 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1836 $(Q
)$(BASH
) $(srctree
)/scripts
/$@
1839 $(PERL
) $(srctree
)/scripts
/namespace.pl
1842 $(PERL
) $(srctree
)/scripts
/export_report.pl
1844 PHONY
+= checkstack kernelrelease kernelversion image_name
1846 # UML needs a little special treatment here. It wants to use the host
1847 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1848 # else wants $(ARCH), including people doing cross-builds, which means
1849 # that $(SUBARCH) doesn't work here.
1851 CHECKSTACK_ARCH
:= $(SUBARCH
)
1853 CHECKSTACK_ARCH
:= $(ARCH
)
1856 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1857 $(PERL
) $(srctree
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1860 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1863 @echo
$(KERNELVERSION
)
1866 @echo
$(KBUILD_IMAGE
)
1868 # Clear a bunch of variables before executing the submake
1870 ifeq ($(quiet
),silent_
)
1875 $(Q
)mkdir
-p
$(objtree
)/tools
1876 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(srctree
)/tools
/
1879 $(Q
)mkdir
-p
$(objtree
)/tools
1880 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(srctree
)/tools
/ $*
1882 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1883 cmd_rmfiles
= rm -rf
$(rm-files
)
1885 # Run depmod only if we have System.map and depmod is executable
1886 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1887 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1890 # read saved command lines for existing targets
1891 existing-targets
:= $(wildcard $(sort $(targets
)))
1893 -include $(foreach f
,$(existing-targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
)
1895 endif # config-build
1897 endif # need-sub-make
1902 # Declare the contents of the PHONY variable as phony. We keep that
1903 # information in a variable so we can use it in if_changed and friends.