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 # That's our default target when none is given on the command line
18 # We are using a recursive build, so we need to do a little thinking
19 # to get the ordering right.
21 # Most importantly: sub-Makefiles should only ever modify files in
22 # their own directory. If in some directory we have a dependency on
23 # a file in another dir (which doesn't happen often, but it's often
24 # unavoidable when linking the built-in.a targets which finally
25 # turn into vmlinux), we will call a sub make in that other dir, and
26 # after that we are sure that everything which is in that other dir
29 # The only cases where we need to modify files which have global
30 # effects are thus separated out and done before the recursive
31 # descending is started. They are now explicitly listed as the
34 ifneq ($(sub_make_done
),1)
36 # Do not use make's built-in rules and variables
37 # (this increases performance and avoids hard-to-debug behaviour)
40 # Avoid funny character set dependencies
44 export LC_COLLATE LC_NUMERIC
46 # Avoid interference with shell env settings
50 # ---------------------------------------------------------------------------
52 # Normally, we echo the whole command before executing it. By making
53 # that echo $($(quiet)$(cmd)), we now have the possibility to set
54 # $(quiet) to choose other forms of output instead, e.g.
56 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
57 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
59 # If $(quiet) is empty, the whole command will be printed.
60 # If it is set to "quiet_", only the short version will be printed.
61 # If it is set to "silent_", nothing will be printed at all, since
62 # the variable $(silent_cmd_cc_o_c) doesn't exist.
64 # A simple variant is to prefix commands with $(Q) - that's useful
65 # for commands that shall be hidden in non-verbose mode.
69 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
70 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
72 # To put more focus on warnings, be less verbose as default
73 # Use 'make V=1' to see the full commands
75 ifeq ("$(origin V)", "command line")
82 ifeq ($(KBUILD_VERBOSE
),1)
90 # If the user is running make -s (silent mode), suppress echoing of
93 ifneq ($(findstring s
,$(filter-out --%,$(MAKEFLAGS
))),)
97 export quiet Q KBUILD_VERBOSE
99 # Kbuild will save output files in the current working directory.
100 # This does not need to match to the root of the kernel source tree.
102 # For example, you can do this:
104 # cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile
106 # If you want to save output files in a different location, there are
107 # two syntaxes to specify it.
110 # Use "make O=dir/to/store/output/files/"
112 # 2) Set KBUILD_OUTPUT
113 # Set the environment variable KBUILD_OUTPUT to point to the output directory.
114 # export KBUILD_OUTPUT=dir/to/store/output/files/; make
116 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
119 # Do we want to change the working directory?
120 ifeq ("$(origin O)", "command line")
121 KBUILD_OUTPUT
:= $(O
)
124 ifneq ($(KBUILD_OUTPUT
),)
125 # Make's built-in functions such as $(abspath ...), $(realpath ...) cannot
126 # expand a shell special character '~'. We use a somewhat tedious way here.
127 abs_objtree
:= $(shell mkdir
-p
$(KBUILD_OUTPUT
) && cd
$(KBUILD_OUTPUT
) && pwd
)
128 $(if
$(abs_objtree
),, \
129 $(error failed to create output directory
"$(KBUILD_OUTPUT)"))
131 # $(realpath ...) resolves symlinks
132 abs_objtree
:= $(realpath
$(abs_objtree
))
134 abs_objtree
:= $(CURDIR
)
135 endif # ifneq ($(KBUILD_OUTPUT),)
137 ifeq ($(abs_objtree
),$(CURDIR
))
138 # Suppress "Entering directory ..." unless we are changing the work directory.
139 MAKEFLAGS
+= --no-print-directory
144 abs_srctree
:= $(realpath
$(dir $(lastword
$(MAKEFILE_LIST
))))
146 ifneq ($(words $(subst :, ,$(abs_srctree
))), 1)
147 $(error source directory cannot contain spaces or colons
)
150 ifneq ($(abs_srctree
),$(abs_objtree
))
151 # Look for make include files relative to root of kernel src
153 # This does not become effective immediately because MAKEFLAGS is re-parsed
154 # once after the Makefile is read. We need to invoke sub-make.
155 MAKEFLAGS
+= --include-dir
=$(abs_srctree
)
159 ifneq ($(filter 3.
%,$(MAKE_VERSION
)),)
160 # 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x
161 # We need to invoke sub-make to avoid implicit rules in the top Makefile.
163 # Cancel implicit rules for this Makefile.
164 $(lastword
$(MAKEFILE_LIST
)): ;
167 export abs_srctree abs_objtree
168 export sub_make_done
:= 1
170 ifeq ($(need-sub-make
),1)
172 PHONY
+= $(MAKECMDGOALS
) sub-make
174 $(filter-out _all sub-make
$(lastword
$(MAKEFILE_LIST
)), $(MAKECMDGOALS
)) _all
: sub-make
177 # Invoke a second make in the output directory, passing relevant variables
179 $(Q
)$(MAKE
) -C
$(abs_objtree
) -f
$(abs_srctree
)/Makefile
$(MAKECMDGOALS
)
181 endif # need-sub-make
182 endif # sub_make_done
184 # We process the rest of the Makefile if this is the final invocation of make
185 ifeq ($(need-sub-make
),)
187 # Do not print "Entering directory ...",
188 # but we want to display it when entering to the output directory
189 # so that IDEs/editors are able to understand relative filenames.
190 MAKEFLAGS
+= --no-print-directory
192 # Call a source code checker (by default, "sparse") as part of the
195 # Use 'make C=1' to enable checking of only re-compiled files.
196 # Use 'make C=2' to enable checking of *all* source files, regardless
197 # of whether they are re-compiled or not.
199 # See the file "Documentation/dev-tools/sparse.rst" for more details,
200 # including where to get the "sparse" utility.
202 ifeq ("$(origin C)", "command line")
203 KBUILD_CHECKSRC
= $(C
)
205 ifndef KBUILD_CHECKSRC
209 # Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the
210 # directory of external module to build. Setting M= takes precedence.
211 ifeq ("$(origin M)", "command line")
212 KBUILD_EXTMOD
:= $(M
)
215 export KBUILD_CHECKSRC KBUILD_EXTMOD
217 extmod-prefix
= $(if
$(KBUILD_EXTMOD
),$(KBUILD_EXTMOD
)/)
219 ifeq ($(abs_srctree
),$(abs_objtree
))
220 # building in the source tree
222 building_out_of_srctree
:=
224 ifeq ($(abs_srctree
)/,$(dir $(abs_objtree
)))
225 # building in a subdirectory of the source tree
228 srctree
:= $(abs_srctree
)
230 building_out_of_srctree
:= 1
233 ifneq ($(KBUILD_ABS_SRCTREE
),)
234 srctree
:= $(abs_srctree
)
240 export building_out_of_srctree srctree objtree VPATH
242 # To make sure we do not include .config for any of the *config targets
243 # catch them early, and hand them over to scripts/kconfig/Makefile
244 # It is allowed to specify more targets when calling make, including
245 # mixing *config targets and build targets.
246 # For example 'make oldconfig all'.
247 # Detect when mixed targets is specified, and make a second invocation
248 # of make so .config is not included in this case either (for *config).
250 version_h
:= include/generated
/uapi
/linux
/version.h
251 old_version_h
:= include/linux
/version.h
253 clean-targets
:= %clean mrproper cleandocs
254 no-dot-config-targets
:= $(clean-targets
) \
255 cscope gtags TAGS
tags help
% %docs
check% coccicheck \
256 $(version_h
) headers headers_
% archheaders archscripts \
257 %asm-generic kernelversion
%src-pkg
258 no-sync-config-targets
:= $(no-dot-config-targets
) install %install \
260 single-targets
:= %.a
%.i
%.ko
%.lds
%.ll
%.lst
%.mod
%.o
%.s
%.symtypes
%/
268 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
269 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
274 ifneq ($(filter $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
275 ifeq ($(filter-out $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
280 ifneq ($(KBUILD_EXTMOD
),)
284 ifeq ($(KBUILD_EXTMOD
),)
285 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
287 ifneq ($(words $(MAKECMDGOALS
)),1)
293 # We cannot build single targets and the others at the same time
294 ifneq ($(filter $(single-targets
), $(MAKECMDGOALS
)),)
296 ifneq ($(filter-out $(single-targets
), $(MAKECMDGOALS
)),)
301 # For "make -j clean all", "make -j mrproper defconfig all", etc.
302 ifneq ($(filter $(clean-targets
),$(MAKECMDGOALS
)),)
303 ifneq ($(filter-out $(clean-targets
),$(MAKECMDGOALS
)),)
308 # install and modules_install need also be processed one by one
309 ifneq ($(filter install,$(MAKECMDGOALS
)),)
310 ifneq ($(filter modules_install
,$(MAKECMDGOALS
)),)
316 # ===========================================================================
317 # We're called with mixed targets (*config and build targets).
318 # Handle them one by one.
320 PHONY
+= $(MAKECMDGOALS
) __build_one_by_one
322 $(filter-out __build_one_by_one
, $(MAKECMDGOALS
)): __build_one_by_one
327 for i in
$(MAKECMDGOALS
); do \
328 $(MAKE
) -f
$(srctree
)/Makefile
$$i; \
333 include scripts
/Kbuild.
include
335 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
336 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
337 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
338 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
340 include scripts
/subarch.
include
342 # Cross compiling and selecting different set of gcc/bin-utils
343 # ---------------------------------------------------------------------------
345 # When performing cross compilation for other architectures ARCH shall be set
346 # to the target architecture. (See arch/* for the possibilities).
347 # ARCH can be set during invocation of make:
349 # Another way is to have ARCH set in the environment.
350 # The default ARCH is the host where make is executed.
352 # CROSS_COMPILE specify the prefix used for all executables used
353 # during compilation. Only gcc and related bin-utils executables
354 # are prefixed with $(CROSS_COMPILE).
355 # CROSS_COMPILE can be set on the command line
356 # make CROSS_COMPILE=ia64-linux-
357 # Alternatively CROSS_COMPILE can be set in the environment.
358 # Default value for CROSS_COMPILE is not to prefix executables
359 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
362 # Architecture as present in compile.h
363 UTS_MACHINE
:= $(ARCH
)
366 # Additional ARCH settings for x86
370 ifeq ($(ARCH
),x86_64
)
374 # Additional ARCH settings for sparc
375 ifeq ($(ARCH
),sparc32
)
378 ifeq ($(ARCH
),sparc64
)
382 # Additional ARCH settings for sh
387 KCONFIG_CONFIG ?
= .config
388 export KCONFIG_CONFIG
390 # SHELL used by kbuild
393 HOST_LFS_CFLAGS
:= $(shell getconf LFS_CFLAGS
2>/dev
/null
)
394 HOST_LFS_LDFLAGS
:= $(shell getconf LFS_LDFLAGS
2>/dev
/null
)
395 HOST_LFS_LIBS
:= $(shell getconf LFS_LIBS
2>/dev
/null
)
399 KBUILD_HOSTCFLAGS
:= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2 \
400 -fomit-frame-pointer
-std
=gnu89
$(HOST_LFS_CFLAGS
) \
402 KBUILD_HOSTCXXFLAGS
:= -O2
$(HOST_LFS_CFLAGS
) $(HOSTCXXFLAGS
)
403 KBUILD_HOSTLDFLAGS
:= $(HOST_LFS_LDFLAGS
) $(HOSTLDFLAGS
)
404 KBUILD_HOSTLDLIBS
:= $(HOST_LFS_LIBS
) $(HOSTLDLIBS
)
406 # Make variables (CC, etc...)
407 AS
= $(CROSS_COMPILE
)as
408 LD
= $(CROSS_COMPILE
)ld
409 CC
= $(CROSS_COMPILE
)gcc
411 AR
= $(CROSS_COMPILE
)ar
412 NM
= $(CROSS_COMPILE
)nm
413 STRIP
= $(CROSS_COMPILE
)strip
414 OBJCOPY
= $(CROSS_COMPILE
)objcopy
415 OBJDUMP
= $(CROSS_COMPILE
)objdump
416 OBJSIZE
= $(CROSS_COMPILE
)size
417 READELF
= $(CROSS_COMPILE
)readelf
422 INSTALLKERNEL
:= installkernel
423 DEPMOD
= /sbin
/depmod
430 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
431 -Wbitwise
-Wno-return-void
-Wno-unknown-attribute
$(CF
)
440 # Use USERINCLUDE when you must reference the UAPI directories only.
442 -I
$(srctree
)/arch
/$(SRCARCH
)/include/uapi \
443 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated
/uapi \
444 -I
$(srctree
)/include/uapi \
445 -I
$(objtree
)/include/generated
/uapi \
446 -include $(srctree
)/include/linux
/kconfig.h
448 # Use LINUXINCLUDE when you must reference the include/ directory.
449 # Needed to be compatible with the O= option
451 -I
$(srctree
)/arch
/$(SRCARCH
)/include \
452 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated \
453 $(if
$(building_out_of_srctree
),-I
$(srctree
)/include) \
454 -I
$(objtree
)/include \
457 KBUILD_AFLAGS
:= -D__ASSEMBLY__
-fno-PIE
458 KBUILD_CFLAGS
:= -Wall
-Wundef
-Werror
=strict-prototypes
-Wno-trigraphs \
459 -fno-strict-aliasing
-fno-common
-fshort-wchar
-fno-PIE \
460 -Werror
=implicit-function-declaration
-Werror
=implicit-int \
461 -Wno-format-security \
463 KBUILD_CPPFLAGS
:= -D__KERNEL__
464 KBUILD_AFLAGS_KERNEL
:=
465 KBUILD_CFLAGS_KERNEL
:=
466 KBUILD_AFLAGS_MODULE
:= -DMODULE
467 KBUILD_CFLAGS_MODULE
:= -DMODULE
468 KBUILD_LDFLAGS_MODULE
:=
469 export KBUILD_LDS_MODULE
:= $(srctree
)/scripts
/module-common.lds
471 GCC_PLUGINS_CFLAGS
:=
474 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
475 export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
476 export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
477 export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
479 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
480 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
481 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
482 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
483 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
484 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
486 # Files to ignore in find ... statements
488 export RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o \
489 -name CVS
-o
-name .
pc -o
-name .hg
-o
-name .git \
) \
491 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
492 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
494 # ===========================================================================
495 # Rules shared between *config targets and build targets
497 # Basic helpers built in scripts/basic/
498 PHONY
+= scripts_basic
500 $(Q
)$(MAKE
) $(build
)=scripts
/basic
501 $(Q
)rm -f .tmp_quiet_recordmcount
503 PHONY
+= outputmakefile
504 # Before starting out-of-tree build, make sure the source tree is clean.
505 # outputmakefile generates a Makefile in the output directory, if using a
506 # separate output directory. This allows convenient use of make in the
508 # At the same time when output Makefile generated, generate .gitignore to
509 # ignore whole output directory
511 ifdef building_out_of_srctree
512 $(Q
)if
[ -f
$(srctree
)/.config
-o \
513 -d
$(srctree
)/include/config
-o \
514 -d
$(srctree
)/arch
/$(SRCARCH
)/include/generated
]; then \
516 echo
>&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
517 echo
>&2 "*** in $(abs_srctree)";\
521 $(Q
)ln
-fsn
$(srctree
) source
522 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile
$(srctree
)
523 $(Q
)test -e .gitignore || \
524 { echo
"# this is build directory, ignore it"; echo
"*"; } > .gitignore
527 ifneq ($(shell $(CC
) --version
2>&1 | head
-n
1 | grep clang
),)
528 ifneq ($(CROSS_COMPILE
),)
529 CLANG_FLAGS
+= --target
=$(notdir $(CROSS_COMPILE
:%-=%))
530 GCC_TOOLCHAIN_DIR
:= $(dir $(shell which
$(CROSS_COMPILE
)elfedit
))
531 CLANG_FLAGS
+= --prefix=$(GCC_TOOLCHAIN_DIR
)
532 GCC_TOOLCHAIN
:= $(realpath
$(GCC_TOOLCHAIN_DIR
)/..
)
534 ifneq ($(GCC_TOOLCHAIN
),)
535 CLANG_FLAGS
+= --gcc-toolchain
=$(GCC_TOOLCHAIN
)
537 ifeq ($(shell $(AS
) --version
2>&1 | head
-n
1 | grep clang
),)
538 CLANG_FLAGS
+= -no-integrated-as
540 CLANG_FLAGS
+= -Werror
=unknown-warning-option
541 KBUILD_CFLAGS
+= $(CLANG_FLAGS
)
542 KBUILD_AFLAGS
+= $(CLANG_FLAGS
)
546 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
547 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
548 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
549 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
550 CC_VERSION_TEXT
= $(shell $(CC
) --version
2>/dev
/null | head
-n
1)
553 # ===========================================================================
554 # *config targets only - make sure prerequisites are updated, and descend
555 # in scripts/kconfig to make the *config target
557 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
558 # KBUILD_DEFCONFIG may point out an alternative default configuration
559 # used for 'make defconfig'
560 include arch
/$(SRCARCH
)/Makefile
561 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
563 config
: outputmakefile scripts_basic FORCE
564 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
566 %config
: outputmakefile scripts_basic FORCE
567 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
570 # ===========================================================================
571 # Build targets only - this includes vmlinux, arch specific targets, clean
572 # targets and others. In general all targets except *config targets.
574 # If building an external module we do not care about the all: rule
575 # but instead _all depend on modules
577 ifeq ($(KBUILD_EXTMOD
),)
583 # Decide whether to build built-in, modular, or both.
584 # Normally, just do built-in.
589 # If we have only "make modules", don't compile built-in objects.
590 # When we're building modules with modversions, we need to consider
591 # the built-in objects during the descend as well, in order to
592 # make sure the checksums are up to date before we record them.
594 ifeq ($(MAKECMDGOALS
),modules
)
595 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
598 # If we have "make <whatever> modules", compile modules
599 # in addition to whatever we do anyway.
600 # Just "make" or "make all" shall build modules as well
602 ifneq ($(filter all _all modules nsdeps
,$(MAKECMDGOALS
)),)
606 ifeq ($(MAKECMDGOALS
),)
610 export KBUILD_MODULES KBUILD_BUILTIN
613 include include/config
/auto.conf
616 ifeq ($(KBUILD_EXTMOD
),)
617 # Objects we will link into vmlinux / subdirs we need to visit
619 drivers-y
:= drivers
/ sound
/
620 drivers-
$(CONFIG_SAMPLES
) += samples
/
625 endif # KBUILD_EXTMOD
627 # The all: target is the default when no target is given on the
629 # This allow a user to issue only 'make' to build a kernel including modules
630 # Defaults to vmlinux, but the arch makefile usually adds further targets
633 CFLAGS_GCOV
:= -fprofile-arcs
-ftest-coverage \
634 $(call cc-option
,-fno-tree-loop-im
) \
635 $(call cc-disable-warning
,maybe-uninitialized
,)
638 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
639 ifdef CONFIG_FUNCTION_TRACER
640 CC_FLAGS_FTRACE
:= -pg
643 RETPOLINE_CFLAGS_GCC
:= -mindirect-branch
=thunk-extern
-mindirect-branch-register
644 RETPOLINE_VDSO_CFLAGS_GCC
:= -mindirect-branch
=thunk-inline
-mindirect-branch-register
645 RETPOLINE_CFLAGS_CLANG
:= -mretpoline-external-thunk
646 RETPOLINE_VDSO_CFLAGS_CLANG
:= -mretpoline
647 RETPOLINE_CFLAGS
:= $(call cc-option
,$(RETPOLINE_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_CFLAGS_CLANG
)))
648 RETPOLINE_VDSO_CFLAGS
:= $(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_CLANG
)))
649 export RETPOLINE_CFLAGS
650 export RETPOLINE_VDSO_CFLAGS
652 include arch
/$(SRCARCH
)/Makefile
655 ifdef may-sync-config
656 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
657 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
658 # because some architectures define CROSS_COMPILE there.
659 include include/config
/auto.conf.cmd
663 @echo
>&2 '*** Configuration file "$@" not found!'
665 @echo
>&2 '*** Please run some configurator (e.g. "make oldconfig" or'
666 @echo
>&2 '*** "make menuconfig" or "make xconfig").'
670 # The actual configuration files used during the build are stored in
671 # include/generated/ and include/config/. Update them if .config is newer than
672 # include/config/auto.conf (which mirrors .config).
674 # This exploits the 'multi-target pattern rule' trick.
675 # The syncconfig should be executed only once to make all the targets.
676 %/auto.conf
%/auto.conf.cmd
: $(KCONFIG_CONFIG
)
677 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile syncconfig
678 else # !may-sync-config
679 # External modules and some install targets need include/generated/autoconf.h
680 # and include/config/auto.conf but do not care if they are up-to-date.
681 # Use auto.conf to trigger the test
682 PHONY
+= include/config
/auto.conf
684 include/config
/auto.conf
:
685 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
687 echo
>&2 " ERROR: Kernel configuration is invalid."; \
688 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
689 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
693 endif # may-sync-config
696 KBUILD_CFLAGS
+= $(call cc-option
,-fno-delete-null-pointer-checks
,)
697 KBUILD_CFLAGS
+= $(call cc-disable-warning
,frame-address
,)
698 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-truncation
)
699 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-overflow
)
700 KBUILD_CFLAGS
+= $(call cc-disable-warning
, address-of-packed-member
)
702 ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
704 else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
706 else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
710 ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
711 KBUILD_CFLAGS
+= -Wno-maybe-uninitialized
714 # Tell gcc to never replace conditional load with a non-conditional one
715 KBUILD_CFLAGS
+= $(call cc-option
,--param
=allow-store-data-races
=0)
717 include scripts
/Makefile.kcov
718 include scripts
/Makefile.gcc-plugins
720 ifdef CONFIG_READABLE_ASM
721 # Disable optimizations that make assembler listings hard to read.
722 # reorder blocks reorders the control in the function
723 # ipa clone creates specialized cloned functions
724 # partial inlining inlines only parts of functions
725 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
726 $(call cc-option
,-fno-ipa-cp-clone
,) \
727 $(call cc-option
,-fno-partial-inlining
)
730 ifneq ($(CONFIG_FRAME_WARN
),0)
731 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
734 stackp-flags-
$(CONFIG_CC_HAS_STACKPROTECTOR_NONE
) := -fno-stack-protector
735 stackp-flags-
$(CONFIG_STACKPROTECTOR
) := -fstack-protector
736 stackp-flags-
$(CONFIG_STACKPROTECTOR_STRONG
) := -fstack-protector-strong
738 KBUILD_CFLAGS
+= $(stackp-flags-y
)
740 ifdef CONFIG_CC_IS_CLANG
741 KBUILD_CPPFLAGS
+= -Qunused-arguments
742 KBUILD_CFLAGS
+= -Wno-format-invalid-specifier
743 KBUILD_CFLAGS
+= -Wno-gnu
744 # Quiet clang warning: comparison of unsigned expression < 0 is always false
745 KBUILD_CFLAGS
+= -Wno-tautological-compare
746 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
747 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
748 # See modpost pattern 2
749 KBUILD_CFLAGS
+= -mno-global-merge
752 # These warnings generated too much noise in a regular build.
753 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
754 KBUILD_CFLAGS
+= -Wno-unused-but-set-variable
756 # Warn about unmarked fall-throughs in switch statement.
757 # Disabled for clang while comment to attribute conversion happens and
758 # https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
759 KBUILD_CFLAGS
+= $(call cc-option
,-Wimplicit-fallthrough
,)
762 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-const-variable
)
763 ifdef CONFIG_FRAME_POINTER
764 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
766 # Some targets (ARM with Thumb2, for example), can't be built with frame
767 # pointers. For those, we don't have FUNCTION_TRACER automatically
768 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
769 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
770 # -fomit-frame-pointer with FUNCTION_TRACER.
771 ifndef CONFIG_FUNCTION_TRACER
772 KBUILD_CFLAGS
+= -fomit-frame-pointer
776 # Initialize all stack variables with a pattern, if desired.
777 ifdef CONFIG_INIT_STACK_ALL
778 KBUILD_CFLAGS
+= -ftrivial-auto-var-init
=pattern
781 DEBUG_CFLAGS
:= $(call cc-option
, -fno-var-tracking-assignments
)
783 ifdef CONFIG_DEBUG_INFO
784 ifdef CONFIG_DEBUG_INFO_SPLIT
785 DEBUG_CFLAGS
+= -gsplit-dwarf
789 KBUILD_AFLAGS
+= -Wa
,-gdwarf-2
791 ifdef CONFIG_DEBUG_INFO_DWARF4
792 DEBUG_CFLAGS
+= -gdwarf-4
795 ifdef CONFIG_DEBUG_INFO_REDUCED
796 DEBUG_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
) \
797 $(call cc-option
,-fno-var-tracking
)
800 KBUILD_CFLAGS
+= $(DEBUG_CFLAGS
)
803 ifdef CONFIG_FUNCTION_TRACER
804 ifdef CONFIG_FTRACE_MCOUNT_RECORD
805 # gcc 5 supports generating the mcount tables directly
806 ifeq ($(call cc-option-yn
,-mrecord-mcount
),y
)
807 CC_FLAGS_FTRACE
+= -mrecord-mcount
808 export CC_USING_RECORD_MCOUNT
:= 1
810 ifdef CONFIG_HAVE_NOP_MCOUNT
811 ifeq ($(call cc-option-yn
, -mnop-mcount
),y
)
812 CC_FLAGS_FTRACE
+= -mnop-mcount
813 CC_FLAGS_USING
+= -DCC_USING_NOP_MCOUNT
817 ifdef CONFIG_HAVE_FENTRY
818 ifeq ($(call cc-option-yn
, -mfentry
),y
)
819 CC_FLAGS_FTRACE
+= -mfentry
820 CC_FLAGS_USING
+= -DCC_USING_FENTRY
823 export CC_FLAGS_FTRACE
824 KBUILD_CFLAGS
+= $(CC_FLAGS_FTRACE
) $(CC_FLAGS_USING
)
825 KBUILD_AFLAGS
+= $(CC_FLAGS_USING
)
826 ifdef CONFIG_DYNAMIC_FTRACE
827 ifdef CONFIG_HAVE_C_RECORDMCOUNT
828 BUILD_C_RECORDMCOUNT
:= y
829 export BUILD_C_RECORDMCOUNT
834 # We trigger additional mismatches with less inlining
835 ifdef CONFIG_DEBUG_SECTION_MISMATCH
836 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
839 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
840 KBUILD_CFLAGS_KERNEL
+= -ffunction-sections
-fdata-sections
841 LDFLAGS_vmlinux
+= --gc-sections
844 ifdef CONFIG_LIVEPATCH
845 KBUILD_CFLAGS
+= $(call cc-option
, -flive-patching
=inline-clone
)
848 # arch Makefile may override CC so keep this after arch Makefile is included
849 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
851 # warn about C99 declaration after statement
852 KBUILD_CFLAGS
+= -Wdeclaration-after-statement
854 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
855 KBUILD_CFLAGS
+= -Wvla
857 # disable pointer signed / unsigned warnings in gcc 4.0
858 KBUILD_CFLAGS
+= -Wno-pointer-sign
860 # disable stringop warnings in gcc 8+
861 KBUILD_CFLAGS
+= $(call cc-disable-warning
, stringop-truncation
)
863 # disable invalid "can't wrap" optimizations for signed / pointers
864 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
866 # clang sets -fmerge-all-constants by default as optimization, but this
867 # is non-conforming behavior for C and in fact breaks the kernel, so we
868 # need to disable it here generally.
869 KBUILD_CFLAGS
+= $(call cc-option
,-fno-merge-all-constants
)
871 # for gcc -fno-merge-all-constants disables everything, but it is fine
872 # to have actual conforming behavior enabled.
873 KBUILD_CFLAGS
+= $(call cc-option
,-fmerge-constants
)
875 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
876 KBUILD_CFLAGS
+= $(call cc-option
,-fno-stack-check
,)
878 # conserve stack if available
879 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
881 # Prohibit date/time macros, which would make the build non-deterministic
882 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=date-time
)
884 # enforce correct pointer usage
885 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=incompatible-pointer-types
)
887 # Require designated initializers for all marked structures
888 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=designated-init
)
890 # change __FILE__ to the relative path from the srctree
891 KBUILD_CFLAGS
+= $(call cc-option
,-fmacro-prefix-map
=$(srctree
)/=)
893 # ensure -fcf-protection is disabled when using retpoline as it is
894 # incompatible with -mindirect-branch=thunk-extern
895 ifdef CONFIG_RETPOLINE
896 KBUILD_CFLAGS
+= $(call cc-option
,-fcf-protection
=none
)
899 include scripts
/Makefile.kasan
900 include scripts
/Makefile.extrawarn
901 include scripts
/Makefile.ubsan
903 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
904 KBUILD_CPPFLAGS
+= $(KCPPFLAGS
)
905 KBUILD_AFLAGS
+= $(KAFLAGS
)
906 KBUILD_CFLAGS
+= $(KCFLAGS
)
908 KBUILD_LDFLAGS_MODULE
+= --build-id
909 LDFLAGS_vmlinux
+= --build-id
911 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
912 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
915 ifeq ($(CONFIG_RELR
),y
)
916 LDFLAGS_vmlinux
+= --pack-dyn-relocs
=relr
919 # make the checker run with the right architecture
920 CHECKFLAGS
+= --arch
=$(ARCH
)
922 # insure the checker run with the right endianness
923 CHECKFLAGS
+= $(if
$(CONFIG_CPU_BIG_ENDIAN
),-mbig-endian
,-mlittle-endian
)
925 # the checker needs the correct machine size
926 CHECKFLAGS
+= $(if
$(CONFIG_64BIT
),-m64
,-m32
)
928 # Default kernel image to build when no specific target is given.
929 # KBUILD_IMAGE may be overruled on the command line or
930 # set in the environment
931 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
933 export KBUILD_IMAGE ?
= vmlinux
936 # INSTALL_PATH specifies where to place the updated kernel and system map
937 # images. Default is /boot, but you can set it to other values
938 export INSTALL_PATH ?
= /boot
941 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
942 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
943 # an argument if needed. Otherwise it defaults to the kernel install path
945 export INSTALL_DTBS_PATH ?
= $(INSTALL_PATH
)/dtbs
/$(KERNELRELEASE
)
948 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
949 # relocations required by build roots. This is not defined in the
950 # makefile but the argument can be passed to make if needed.
953 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
957 # INSTALL_MOD_STRIP, if defined, will cause modules to be
958 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
959 # the default option --strip-debug will be used. Otherwise,
960 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
962 ifdef INSTALL_MOD_STRIP
963 ifeq ($(INSTALL_MOD_STRIP
),1)
964 mod_strip_cmd
= $(STRIP
) --strip-debug
966 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
967 endif # INSTALL_MOD_STRIP=1
970 endif # INSTALL_MOD_STRIP
973 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
974 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
975 # or CONFIG_MODULE_COMPRESS_XZ.
977 mod_compress_cmd
= true
978 ifdef CONFIG_MODULE_COMPRESS
979 ifdef CONFIG_MODULE_COMPRESS_GZIP
980 mod_compress_cmd
= gzip
-n
-f
981 endif # CONFIG_MODULE_COMPRESS_GZIP
982 ifdef CONFIG_MODULE_COMPRESS_XZ
983 mod_compress_cmd
= xz
-f
984 endif # CONFIG_MODULE_COMPRESS_XZ
985 endif # CONFIG_MODULE_COMPRESS
986 export mod_compress_cmd
988 ifdef CONFIG_MODULE_SIG_ALL
989 $(eval
$(call config_filename
,MODULE_SIG_KEY
))
991 mod_sign_cmd
= scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODULE_SIG_KEY_SRCPREFIX
)$(CONFIG_MODULE_SIG_KEY
) certs
/signing_key.x509
997 HOST_LIBELF_LIBS
= $(shell pkg-config libelf
--libs
2>/dev
/null || echo
-lelf
)
999 ifdef CONFIG_STACK_VALIDATION
1000 has_libelf
:= $(call try-run
,\
1001 echo
"int main() {}" |
$(HOSTCC
) -xc
-o
/dev
/null
$(HOST_LIBELF_LIBS
) -,1,0)
1002 ifeq ($(has_libelf
),1)
1003 objtool_target
:= tools
/objtool FORCE
1005 SKIP_STACK_VALIDATION
:= 1
1006 export SKIP_STACK_VALIDATION
1012 export MODORDER
:= $(extmod-prefix
)modules.order
1013 export MODULES_NSDEPS
:= $(extmod-prefix
)modules.nsdeps
1015 ifeq ($(KBUILD_EXTMOD
),)
1016 core-y
+= kernel
/ certs
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
1018 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
1019 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
1020 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
) $(virt-y
)))
1022 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) Documentation \
1023 $(patsubst %/,%,$(filter %/, $(init-
) $(core-
) \
1024 $(drivers-
) $(net-
) $(libs-
) $(virt-
))))
1026 build-dirs
:= $(vmlinux-dirs
)
1027 clean-dirs
:= $(vmlinux-alldirs
)
1029 init-y
:= $(patsubst %/, %/built-in.a
, $(init-y
))
1030 core-y
:= $(patsubst %/, %/built-in.a
, $(core-y
))
1031 drivers-y
:= $(patsubst %/, %/built-in.a
, $(drivers-y
))
1032 net-y
:= $(patsubst %/, %/built-in.a
, $(net-y
))
1033 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
1034 libs-y2
:= $(patsubst %/, %/built-in.a
, $(filter-out %.a
, $(libs-y
)))
1035 virt-y
:= $(patsubst %/, %/built-in.a
, $(virt-y
))
1037 # Externally visible symbols (used by link-vmlinux.sh)
1038 export KBUILD_VMLINUX_OBJS
:= $(head-y
) $(init-y
) $(core-y
) $(libs-y2
) \
1039 $(drivers-y
) $(net-y
) $(virt-y
)
1040 export KBUILD_VMLINUX_LIBS
:= $(libs-y1
)
1041 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
1042 export LDFLAGS_vmlinux
1043 # used by scripts/Makefile.package
1044 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) LICENSES arch
include scripts tools
)
1046 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_OBJS
) $(KBUILD_VMLINUX_LIBS
)
1048 # Recurse until adjust_autoksyms.sh is satisfied
1049 PHONY
+= autoksyms_recursive
1050 ifdef CONFIG_TRIM_UNUSED_KSYMS
1051 autoksyms_recursive
: descend modules.order
1052 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/adjust_autoksyms.sh \
1053 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1056 # For the kernel to actually contain only the needed exported symbols,
1057 # we have to build modules as well to determine what those symbols are.
1058 # (this can be evaluated only once include/config/auto.conf has been included)
1059 ifdef CONFIG_TRIM_UNUSED_KSYMS
1063 autoksyms_h
:= $(if
$(CONFIG_TRIM_UNUSED_KSYMS
), include/generated
/autoksyms.h
)
1066 $(Q
)mkdir
-p
$(dir $@
)
1069 ARCH_POSTLINK
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/Makefile.postlink
)
1071 # Final link of vmlinux with optional arch pass after final link
1072 cmd_link-vmlinux
= \
1073 $(CONFIG_SHELL
) $< $(LD
) $(KBUILD_LDFLAGS
) $(LDFLAGS_vmlinux
) ; \
1074 $(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) $@
, true
)
1076 vmlinux
: scripts
/link-vmlinux.sh autoksyms_recursive
$(vmlinux-deps
) FORCE
1077 +$(call if_changed
,link-vmlinux
)
1081 # The actual objects are generated when descending,
1082 # make sure no implicit rule kicks in
1083 $(sort $(vmlinux-deps
)): descend
;
1085 filechk_kernel.release
= \
1086 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1088 # Store (new) KERNELRELEASE string in include/config/kernel.release
1089 include/config
/kernel.release
: FORCE
1090 $(call filechk
,kernel.release
)
1092 # Additional helpers built in scripts/
1093 # Carefully list dependencies so we do not try to build scripts twice
1096 scripts
: scripts_basic scripts_dtc
1097 $(Q
)$(MAKE
) $(build
)=$(@
)
1099 # Things we need to do before we recursively start building the kernel
1100 # or the modules are listed in "prepare".
1101 # A multi level approach is used. prepareN is processed before prepareN-1.
1102 # archprepare is used in arch Makefiles and when processed asm symlink,
1103 # version.h and scripts_basic is processed / created.
1105 PHONY
+= prepare archprepare
1107 archprepare
: outputmakefile archheaders archscripts scripts
include/config
/kernel.release \
1108 asm-generic
$(version_h
) $(autoksyms_h
) include/generated
/utsrelease.h
1110 prepare0
: archprepare
1111 $(Q
)$(MAKE
) $(build
)=scripts
/mod
1112 $(Q
)$(MAKE
) $(build
)=.
1114 # All the preparing..
1115 prepare
: prepare0 prepare-objtool
1117 # Support for using generic headers in asm-generic
1118 asm-generic
:= -f
$(srctree
)/scripts
/Makefile.asm-generic obj
1120 PHONY
+= asm-generic uapi-asm-generic
1121 asm-generic
: uapi-asm-generic
1122 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/asm \
1123 generic
=include/asm-generic
1125 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/uapi
/asm \
1126 generic
=include/uapi
/asm-generic
1128 PHONY
+= prepare-objtool
1129 prepare-objtool
: $(objtool_target
)
1130 ifeq ($(SKIP_STACK_VALIDATION
),1)
1131 ifdef CONFIG_UNWINDER_ORC
1132 @echo
"error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1135 @echo
"warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1139 # Generate some files
1140 # ---------------------------------------------------------------------------
1142 # KERNELRELEASE can change from a few different places, meaning version.h
1143 # needs to be updated, so this check is forced on all builds
1146 define filechk_utsrelease.h
1147 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1148 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1151 echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"
1154 define filechk_version.h
1155 echo \
#define LINUX_VERSION_CODE $(shell \
1156 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
1157 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1161 $(call filechk
,version.h
)
1162 $(Q
)rm -f
$(old_version_h
)
1164 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1165 $(call filechk
,utsrelease.h
)
1169 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
1170 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
1172 # ---------------------------------------------------------------------------
1175 #Default location for installed headers
1176 export INSTALL_HDR_PATH
= $(objtree
)/usr
1178 quiet_cmd_headers_install
= INSTALL
$(INSTALL_HDR_PATH
)/include
1179 cmd_headers_install
= \
1180 mkdir
-p
$(INSTALL_HDR_PATH
); \
1181 rsync
-mrl
--include='*/' --include='*\.h' --exclude
='*' \
1182 usr
/include $(INSTALL_HDR_PATH
)
1184 PHONY
+= headers_install
1185 headers_install
: headers
1186 $(call cmd
,headers_install
)
1188 PHONY
+= archheaders archscripts
1190 hdr-inst
:= -f
$(srctree
)/scripts
/Makefile.headersinst obj
1193 headers
: $(version_h
) scripts_unifdef uapi-asm-generic archheaders archscripts
1194 $(if
$(wildcard $(srctree
)/arch
/$(SRCARCH
)/include/uapi
/asm
/Kbuild
),, \
1195 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1196 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi
1197 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(SRCARCH
)/include/uapi
1199 # Deprecated. It is no-op now.
1200 PHONY
+= headers_check
1204 ifdef CONFIG_HEADERS_INSTALL
1208 PHONY
+= scripts_unifdef
1209 scripts_unifdef
: scripts_basic
1210 $(Q
)$(MAKE
) $(build
)=scripts scripts
/unifdef
1212 # ---------------------------------------------------------------------------
1217 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests run_tests
1220 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests
$*
1222 PHONY
+= kselftest-merge
1224 $(if
$(wildcard $(objtree
)/.config
),, $(error No .config exists
, config your kernel first
!))
1225 $(Q
)find
$(srctree
)/tools
/testing
/selftests
-name config | \
1226 xargs
$(srctree
)/scripts
/kconfig
/merge_config.sh
-m
$(objtree
)/.config
1227 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile olddefconfig
1229 # ---------------------------------------------------------------------------
1232 ifneq ($(wildcard $(srctree
)/arch
/$(SRCARCH
)/boot
/dts
/),)
1233 dtstree
:= arch
/$(SRCARCH
)/boot
/dts
1238 %.dtb
: include/config
/kernel.release scripts_dtc
1239 $(Q
)$(MAKE
) $(build
)=$(dtstree
) $(dtstree
)/$@
1241 PHONY
+= dtbs dtbs_install dt_binding_check
1242 dtbs dtbs_check
: include/config
/kernel.release scripts_dtc
1243 $(Q
)$(MAKE
) $(build
)=$(dtstree
)
1245 dtbs_check
: export CHECK_DTBS
=1
1246 dtbs_check
: dt_binding_check
1249 $(Q
)$(MAKE
) $(dtbinst
)=$(dtstree
)
1251 ifdef CONFIG_OF_EARLY_FLATTREE
1257 PHONY
+= scripts_dtc
1258 scripts_dtc
: scripts_basic
1259 $(Q
)$(MAKE
) $(build
)=scripts
/dtc
1261 dt_binding_check
: scripts_dtc
1262 $(Q
)$(MAKE
) $(build
)=Documentation
/devicetree
/bindings
1264 # ---------------------------------------------------------------------------
1267 ifdef CONFIG_MODULES
1269 # By default, build modules as well
1275 # A module can be listed more than once in obj-m resulting in
1276 # duplicate lines in modules.order files. Those are removed
1277 # using awk while concatenating to the final file.
1280 modules
: $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.order
1281 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1282 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/modules-check.sh
1284 modules.order
: descend
1285 $(Q
)$(AWK
) '!x[$$0]++' $(addsuffix /$@
, $(build-dirs
)) > $@
1287 # Target to prepare building external modules
1288 PHONY
+= modules_prepare
1289 modules_prepare
: prepare
1291 # Target to install modules
1292 PHONY
+= modules_install
1293 modules_install
: _modinst_ _modinst_post
1297 @
rm -rf
$(MODLIB
)/kernel
1298 @
rm -f
$(MODLIB
)/source
1299 @mkdir
-p
$(MODLIB
)/kernel
1300 @ln
-s
$(abspath
$(srctree
)) $(MODLIB
)/source
1301 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1302 rm -f
$(MODLIB
)/build
; \
1303 ln
-s
$(CURDIR
) $(MODLIB
)/build
; \
1305 @sed
's:^:kernel/:' modules.order
> $(MODLIB
)/modules.order
1306 @cp
-f modules.builtin
$(MODLIB
)/
1307 @cp
-f
$(objtree
)/modules.builtin.modinfo
$(MODLIB
)/
1308 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1310 # This depmod is only for convenience to give the initial
1311 # boot a modules.dep even before / is mounted read-write. However the
1312 # boot script depmod is the master version.
1313 PHONY
+= _modinst_post
1314 _modinst_post
: _modinst_
1317 ifeq ($(CONFIG_MODULE_SIG
), y
)
1318 PHONY
+= modules_sign
1320 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1323 else # CONFIG_MODULES
1325 # Modules not configured
1326 # ---------------------------------------------------------------------------
1328 PHONY
+= modules modules_install
1329 modules modules_install
:
1331 @echo
>&2 "The present kernel configuration has modules disabled."
1332 @echo
>&2 "Type 'make config' and enable loadable module support."
1333 @echo
>&2 "Then build a kernel with module support enabled."
1337 endif # CONFIG_MODULES
1340 # Cleaning is done on three levels.
1341 # make clean Delete most generated files
1342 # Leave enough to build external modules
1343 # make mrproper Delete the current configuration, and all generated files
1344 # make distclean Remove editor backup files, patch leftover files and the like
1346 # Directories & files removed with 'make clean'
1347 CLEAN_DIRS
+= include/ksym
1348 CLEAN_FILES
+= modules.builtin modules.builtin.modinfo modules.nsdeps
1350 # Directories & files removed with 'make mrproper'
1351 MRPROPER_DIRS
+= include/config
include/generated \
1352 arch
/$(SRCARCH
)/include/generated .tmp_objdiff \
1353 debian
/ snap
/ tar-install
/
1354 MRPROPER_FILES
+= .config .config.old .version \
1356 signing_key.pem signing_key.priv signing_key.x509 \
1357 x509.genkey extra_certificates signing_key.x509.keyid \
1358 signing_key.x509.signer vmlinux-gdb.py \
1361 # Directories & files removed with 'make distclean'
1363 DISTCLEAN_FILES
+= tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS
1365 # clean - Delete most, but leave enough to build external modules
1367 clean: rm-dirs
:= $(CLEAN_DIRS
)
1368 clean: rm-files
:= $(CLEAN_FILES
)
1370 PHONY
+= archclean vmlinuxclean
1373 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1374 $(Q
)$(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) clean)
1376 clean: archclean vmlinuxclean
1378 # mrproper - Delete all generated files, including .config
1380 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1381 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1382 mrproper-dirs
:= $(addprefix _mrproper_
,scripts
)
1384 PHONY
+= $(mrproper-dirs
) mrproper
1386 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1388 mrproper
: clean $(mrproper-dirs
)
1394 distclean: rm-dirs
:= $(wildcard $(DISTCLEAN_DIRS
))
1395 distclean: rm-files
:= $(wildcard $(DISTCLEAN_FILES
))
1402 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1403 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1404 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'*%' \
1405 -o
-name
'core' \
) \
1406 -type f
-print | xargs
rm -f
1409 # Packaging of the kernel to various formats
1410 # ---------------------------------------------------------------------------
1413 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package
$@
1414 %pkg
: include/config
/kernel.release FORCE
1415 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package
$@
1417 # Brief documentation of the typical targets used
1418 # ---------------------------------------------------------------------------
1420 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1421 boards
:= $(sort $(notdir $(boards
)))
1422 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1423 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1427 @echo
'Cleaning targets:'
1428 @echo
' clean - Remove most generated files but keep the config and'
1429 @echo
' enough build support to build external modules'
1430 @echo
' mrproper - Remove all generated files + config + various backup files'
1431 @echo
' distclean - mrproper + remove editor backup and patch files'
1433 @echo
'Configuration targets:'
1434 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1436 @echo
'Other generic targets:'
1437 @echo
' all - Build all targets marked with [*]'
1438 @echo
'* vmlinux - Build the bare kernel'
1439 @echo
'* modules - Build all modules'
1440 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1441 @echo
' dir/ - Build all files in dir and below'
1442 @echo
' dir/file.[ois] - Build specified target only'
1443 @echo
' dir/file.ll - Build the LLVM assembly file'
1444 @echo
' (requires compiler support for LLVM assembly generation)'
1445 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1446 @echo
' (requires a recent binutils and recent build (System.map))'
1447 @echo
' dir/file.ko - Build module including final link'
1448 @echo
' modules_prepare - Set up for building external modules'
1449 @echo
' tags/TAGS - Generate tags file for editors'
1450 @echo
' cscope - Generate cscope index'
1451 @echo
' gtags - Generate GNU GLOBAL index'
1452 @echo
' kernelrelease - Output the release version string (use with make -s)'
1453 @echo
' kernelversion - Output the version stored in Makefile (use with make -s)'
1454 @echo
' image_name - Output the image name (use with make -s)'
1455 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1456 echo
' (default: $(INSTALL_HDR_PATH))'; \
1458 @echo
'Static analysers:'
1459 @echo
' checkstack - Generate a list of stack hogs'
1460 @echo
' namespacecheck - Name space analysis on compiled kernel'
1461 @echo
' versioncheck - Sanity check on version.h usage'
1462 @echo
' includecheck - Check for duplicate included header files'
1463 @echo
' export_report - List the usages of all exported symbols'
1464 @echo
' headerdep - Detect inclusion cycles in headers'
1465 @echo
' coccicheck - Check with Coccinelle'
1468 @echo
' nsdeps - Generate missing symbol namespace dependencies'
1470 @echo
'Kernel selftest:'
1471 @echo
' kselftest - Build and run kernel selftest (run as root)'
1472 @echo
' Build, install, and boot kernel before'
1473 @echo
' running kselftest on it'
1474 @echo
' kselftest-clean - Remove all generated kselftest files'
1475 @echo
' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1479 echo
'Devicetree:'; \
1480 echo
'* dtbs - Build device tree blobs for enabled boards'; \
1481 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1482 echo
' dt_binding_check - Validate device tree binding documents'; \
1483 echo
' dtbs_check - Validate device tree source files';\
1486 @echo
'Userspace tools targets:'
1487 @echo
' use "make tools/help"'
1488 @echo
' or "cd tools; make help"'
1490 @echo
'Kernel packaging:'
1491 @
$(MAKE
) -f
$(srctree
)/scripts
/Makefile.package help
1493 @echo
'Documentation targets:'
1494 @
$(MAKE
) -f
$(srctree
)/Documentation
/Makefile dochelp
1496 @echo
'Architecture specific targets ($(SRCARCH)):'
1497 @
$(if
$(archhelp
),$(archhelp
),\
1498 echo
' No architecture specific help defined for $(SRCARCH)')
1501 $(foreach b
, $(boards
), \
1502 printf
" %-27s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1504 @
$(if
$(board-dirs
), \
1505 $(foreach b
, $(board-dirs
), \
1506 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1507 printf
" %-16s - Show all of the above\\n" help-boards
; \
1510 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1511 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1512 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1513 @echo
' make C=1 [targets] Check re-compiled c source with $$CHECK'
1514 @echo
' (sparse by default)'
1515 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1516 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1517 @echo
' make W=n [targets] Enable extra build checks, n=1,2,3 where'
1518 @echo
' 1: warnings which may be relevant and do not occur too often'
1519 @echo
' 2: warnings which occur quite often but may still be relevant'
1520 @echo
' 3: more obscure warnings, can most likely be ignored'
1521 @echo
' Multiple levels can be combined with W=12 or W=123'
1523 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1524 @echo
'For further info see the ./README file'
1527 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1529 help-boards
: $(help-board-dirs
)
1531 boards-per-dir
= $(sort $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
)))
1533 $(help-board-dirs
): help-
%:
1534 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1535 @
$(if
$(boards-per-dir
), \
1536 $(foreach b
, $(boards-per-dir
), \
1537 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1541 # Documentation targets
1542 # ---------------------------------------------------------------------------
1543 DOC_TARGETS
:= xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1544 linkcheckdocs dochelp refcheckdocs
1545 PHONY
+= $(DOC_TARGETS
)
1547 $(Q
)$(MAKE
) $(build
)=Documentation
$@
1550 # ---------------------------------------------------------------------------
1552 PHONY
+= scripts_gdb
1553 scripts_gdb
: prepare0
1554 $(Q
)$(MAKE
) $(build
)=scripts
/gdb
1555 $(Q
)ln
-fsn
$(abspath
$(srctree
)/scripts
/gdb
/vmlinux-gdb.py
)
1557 ifdef CONFIG_GDB_SCRIPTS
1561 else # KBUILD_EXTMOD
1564 # External module support.
1565 # When building external modules the kernel used as basis is considered
1566 # read-only, and no consistency checks are made and the make
1567 # system is not used on the basis kernel. If updates are required
1568 # in the basis kernel ordinary make commands (without M=...) must
1571 # The following are the only valid targets when building external
1573 # make M=dir clean Delete all automatically generated files
1574 # make M=dir modules Make all modules in specified dir
1575 # make M=dir Same as 'make M=dir modules'
1576 # make M=dir modules_install
1577 # Install the modules built in the module directory
1578 # Assumes install directory is already created
1580 # We are always building modules
1583 PHONY
+= $(objtree
)/Module.symvers
1584 $(objtree
)/Module.symvers
:
1585 @
test -e
$(objtree
)/Module.symvers ||
( \
1587 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1588 echo
" is missing; modules will have no dependencies and modversions."; \
1591 build-dirs
:= $(KBUILD_EXTMOD
)
1593 modules
: descend
$(objtree
)/Module.symvers
1594 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1596 PHONY
+= modules_install
1597 modules_install
: _emodinst_ _emodinst_post
1599 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1602 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1603 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1605 PHONY
+= _emodinst_post
1606 _emodinst_post
: _emodinst_
1609 clean-dirs
:= $(KBUILD_EXTMOD
)
1610 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
$(KBUILD_EXTMOD
)/modules.nsdeps
1614 @echo
>&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
1618 @echo
' Building external modules.'
1619 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1621 @echo
' modules - default target, build the module(s)'
1622 @echo
' modules_install - install the module'
1623 @echo
' clean - remove generated files in module directory only'
1627 endif # KBUILD_EXTMOD
1630 # ---------------------------------------------------------------------------
1631 # To build individual files in subdirectories, you can do like this:
1633 # make foo/bar/baz.s
1635 # The supported suffixes for single-target are listed in 'single-targets'
1637 # To build only under specific subdirectories, you can do like this:
1643 # .ko is special because modpost is needed
1644 single-ko
:= $(sort $(filter %.ko
, $(MAKECMDGOALS
)))
1645 single-no-ko
:= $(sort $(patsubst %.ko
,%.mod
, $(MAKECMDGOALS
)))
1647 $(single-ko
): single_modpost
1649 $(single-no-ko
): descend
1652 ifeq ($(KBUILD_EXTMOD
),)
1653 # For the single build of in-tree modules, use a temporary file to avoid
1654 # the situation of modules_install installing an invalid modules.order.
1655 MODORDER
:= .modules.tmp
1658 PHONY
+= single_modpost
1659 single_modpost
: $(single-no-ko
)
1660 $(Q
){ $(foreach m
, $(single-ko
), echo
$(extmod-prefix
)$m;) } > $(MODORDER
)
1661 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1665 export KBUILD_SINGLE_TARGETS
:= $(addprefix $(extmod-prefix
), $(single-no-ko
))
1667 # trim unrelated directories
1668 build-dirs
:= $(foreach d
, $(build-dirs
), \
1669 $(if
$(filter $(d
)/%, $(KBUILD_SINGLE_TARGETS
)), $(d
)))
1673 # Handle descending into subdirectories listed in $(build-dirs)
1674 # Preset locale variables to speed up the build process. Limit locale
1675 # tweaks to this spot to avoid wrong language settings when running
1676 # make menuconfig etc.
1677 # Error messages still appears in the original language
1678 PHONY
+= descend
$(build-dirs
)
1679 descend
: $(build-dirs
)
1680 $(build-dirs
): prepare
1681 $(Q
)$(MAKE
) $(build
)=$@ \
1682 single-build
=$(if
$(filter-out $@
/, $(filter $@
/%, $(single-no-ko
))),1) \
1683 need-builtin
=1 need-modorder
=1
1685 clean-dirs
:= $(addprefix _clean_
, $(clean-dirs
))
1686 PHONY
+= $(clean-dirs
) clean
1688 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1690 clean: $(clean-dirs
)
1693 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1694 \
( -name
'*.[aios]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1696 -o
-name
'*.dtb' -o
-name
'*.dtb.S' -o
-name
'*.dt.yaml' \
1697 -o
-name
'*.dwo' -o
-name
'*.lst' \
1698 -o
-name
'*.su' -o
-name
'*.mod' \
1699 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1700 -o
-name
'*.lex.c' -o
-name
'*.tab.[ch]' \
1701 -o
-name
'*.asn1.[ch]' \
1702 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1703 -o
-name
'.tmp_*.o.*' \
1704 -o
-name
'*.c.[012]*.*' \
1706 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1708 # Generate tags for editors
1709 # ---------------------------------------------------------------------------
1710 quiet_cmd_tags
= GEN
$@
1711 cmd_tags
= $(BASH
) $(srctree
)/scripts
/tags.sh
$@
1713 tags TAGS cscope gtags
: FORCE
1716 # Script to generate missing namespace dependencies
1717 # ---------------------------------------------------------------------------
1720 nsdeps
: export KBUILD_NSDEPS
=1
1722 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/nsdeps
1724 # Scripts to check various things for consistency
1725 # ---------------------------------------------------------------------------
1727 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1730 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1731 -name
'*.[hcS]' -type f
-print |
sort \
1732 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1735 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1736 -name
'*.[hcS]' -type f
-print |
sort \
1737 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1740 $(Q
)$(BASH
) $(srctree
)/scripts
/$@
1743 $(PERL
) $(srctree
)/scripts
/namespace.pl
1746 $(PERL
) $(srctree
)/scripts
/export_report.pl
1748 PHONY
+= checkstack kernelrelease kernelversion image_name
1750 # UML needs a little special treatment here. It wants to use the host
1751 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1752 # else wants $(ARCH), including people doing cross-builds, which means
1753 # that $(SUBARCH) doesn't work here.
1755 CHECKSTACK_ARCH
:= $(SUBARCH
)
1757 CHECKSTACK_ARCH
:= $(ARCH
)
1760 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1761 $(PERL
) $(srctree
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1764 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1767 @echo
$(KERNELVERSION
)
1770 @echo
$(KBUILD_IMAGE
)
1772 # Clear a bunch of variables before executing the submake
1774 ifeq ($(quiet
),silent_
)
1779 $(Q
)mkdir
-p
$(objtree
)/tools
1780 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(srctree
)/tools
/
1783 $(Q
)mkdir
-p
$(objtree
)/tools
1784 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(srctree
)/tools
/ $*
1786 # FIXME Should go into a make.lib or something
1787 # ===========================================================================
1789 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1790 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1792 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1793 cmd_rmfiles
= rm -f
$(rm-files
)
1795 # Run depmod only if we have System.map and depmod is executable
1796 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1797 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1800 # read saved command lines for existing targets
1801 existing-targets
:= $(wildcard $(sort $(targets
)))
1803 -include $(foreach f
,$(existing-targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
)
1805 endif # config-targets
1807 endif # need-sub-make
1812 # Declare the contents of the PHONY variable as phony. We keep that
1813 # information in a variable so we can use it in if_changed and friends.