1 # SPDX-License-Identifier: GPL-2.0
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
= $(C
)
205 ifndef KBUILD_CHECKSRC
209 # Use make M=dir to specify directory of external module to build
210 # Old syntax make ... SUBDIRS=$PWD is still supported
211 # Setting the environment variable KBUILD_EXTMOD take precedence
213 $(warning
================= WARNING
================)
214 $(warning
'SUBDIRS' will be removed after Linux
5.3)
215 $(warning Please use
'M=' or
'KBUILD_EXTMOD' instead
)
216 $(warning
==========================================)
217 KBUILD_EXTMOD ?
= $(SUBDIRS
)
220 ifeq ("$(origin M)", "command line")
221 KBUILD_EXTMOD
:= $(M
)
224 ifeq ($(abs_srctree
),$(abs_objtree
))
225 # building in the source tree
228 ifeq ($(abs_srctree
)/,$(dir $(abs_objtree
)))
229 # building in a subdirectory of the source tree
232 srctree
:= $(abs_srctree
)
236 # KBUILD_SRC is only used to distinguish in-tree/out-of-tree build.
237 # Replace it with $(srctree) or something.
238 KBUILD_SRC
:= $(abs_srctree
)
241 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
249 export 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_
% archheaders archscripts \
266 %asm-generic kernelversion
%src-pkg
267 no-sync-config-targets
:= $(no-dot-config-targets
) install %install \
275 ifneq ($(filter $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
276 ifeq ($(filter-out $(no-dot-config-targets
), $(MAKECMDGOALS
)),)
281 ifneq ($(filter $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
282 ifeq ($(filter-out $(no-sync-config-targets
), $(MAKECMDGOALS
)),)
287 ifneq ($(KBUILD_EXTMOD
),)
291 ifeq ($(KBUILD_EXTMOD
),)
292 ifneq ($(filter config
%config
,$(MAKECMDGOALS
)),)
294 ifneq ($(words $(MAKECMDGOALS
)),1)
300 # For "make -j clean all", "make -j mrproper defconfig all", etc.
301 ifneq ($(filter $(clean-targets
),$(MAKECMDGOALS
)),)
302 ifneq ($(filter-out $(clean-targets
),$(MAKECMDGOALS
)),)
307 # install and modules_install need also be processed one by one
308 ifneq ($(filter install,$(MAKECMDGOALS
)),)
309 ifneq ($(filter modules_install
,$(MAKECMDGOALS
)),)
314 ifeq ($(mixed-targets
),1)
315 # ===========================================================================
316 # We're called with mixed targets (*config and build targets).
317 # Handle them one by one.
319 PHONY
+= $(MAKECMDGOALS
) __build_one_by_one
321 $(filter-out __build_one_by_one
, $(MAKECMDGOALS
)): __build_one_by_one
326 for i in
$(MAKECMDGOALS
); do \
327 $(MAKE
) -f
$(srctree
)/Makefile
$$i; \
332 include scripts
/Kbuild.
include
334 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
335 KERNELRELEASE
= $(shell cat
include/config
/kernel.release
2> /dev
/null
)
336 KERNELVERSION
= $(VERSION
)$(if
$(PATCHLEVEL
),.
$(PATCHLEVEL
)$(if
$(SUBLEVEL
),.
$(SUBLEVEL
)))$(EXTRAVERSION
)
337 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
339 include scripts
/subarch.
include
341 # Cross compiling and selecting different set of gcc/bin-utils
342 # ---------------------------------------------------------------------------
344 # When performing cross compilation for other architectures ARCH shall be set
345 # to the target architecture. (See arch/* for the possibilities).
346 # ARCH can be set during invocation of make:
348 # Another way is to have ARCH set in the environment.
349 # The default ARCH is the host where make is executed.
351 # CROSS_COMPILE specify the prefix used for all executables used
352 # during compilation. Only gcc and related bin-utils executables
353 # are prefixed with $(CROSS_COMPILE).
354 # CROSS_COMPILE can be set on the command line
355 # make CROSS_COMPILE=ia64-linux-
356 # Alternatively CROSS_COMPILE can be set in the environment.
357 # Default value for CROSS_COMPILE is not to prefix executables
358 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
361 # Architecture as present in compile.h
362 UTS_MACHINE
:= $(ARCH
)
365 # Additional ARCH settings for x86
369 ifeq ($(ARCH
),x86_64
)
373 # Additional ARCH settings for sparc
374 ifeq ($(ARCH
),sparc32
)
377 ifeq ($(ARCH
),sparc64
)
381 # Additional ARCH settings for sh
386 KCONFIG_CONFIG ?
= .config
387 export KCONFIG_CONFIG
389 # SHELL used by kbuild
390 CONFIG_SHELL
:= $(shell if
[ -x
"$$BASH" ]; then echo
$$BASH; \
391 else if
[ -x
/bin
/bash
]; then echo
/bin
/bash
; \
392 else echo sh
; fi
; fi
)
394 HOST_LFS_CFLAGS
:= $(shell getconf LFS_CFLAGS
2>/dev
/null
)
395 HOST_LFS_LDFLAGS
:= $(shell getconf LFS_LDFLAGS
2>/dev
/null
)
396 HOST_LFS_LIBS
:= $(shell getconf LFS_LIBS
2>/dev
/null
)
400 KBUILD_HOSTCFLAGS
:= -Wall
-Wmissing-prototypes
-Wstrict-prototypes
-O2 \
401 -fomit-frame-pointer
-std
=gnu89
$(HOST_LFS_CFLAGS
) \
403 KBUILD_HOSTCXXFLAGS
:= -O2
$(HOST_LFS_CFLAGS
) $(HOSTCXXFLAGS
)
404 KBUILD_HOSTLDFLAGS
:= $(HOST_LFS_LDFLAGS
) $(HOSTLDFLAGS
)
405 KBUILD_HOSTLDLIBS
:= $(HOST_LFS_LIBS
) $(HOSTLDLIBS
)
407 # Make variables (CC, etc...)
408 AS
= $(CROSS_COMPILE
)as
409 LD
= $(CROSS_COMPILE
)ld
410 CC
= $(CROSS_COMPILE
)gcc
412 AR
= $(CROSS_COMPILE
)ar
413 NM
= $(CROSS_COMPILE
)nm
414 STRIP
= $(CROSS_COMPILE
)strip
415 OBJCOPY
= $(CROSS_COMPILE
)objcopy
416 OBJDUMP
= $(CROSS_COMPILE
)objdump
420 INSTALLKERNEL
:= installkernel
421 DEPMOD
= /sbin
/depmod
428 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
429 -Wbitwise
-Wno-return-void
-Wno-unknown-attribute
$(CF
)
438 # Use USERINCLUDE when you must reference the UAPI directories only.
440 -I
$(srctree
)/arch
/$(SRCARCH
)/include/uapi \
441 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated
/uapi \
442 -I
$(srctree
)/include/uapi \
443 -I
$(objtree
)/include/generated
/uapi \
444 -include $(srctree
)/include/linux
/kconfig.h
446 # Use LINUXINCLUDE when you must reference the include/ directory.
447 # Needed to be compatible with the O= option
449 -I
$(srctree
)/arch
/$(SRCARCH
)/include \
450 -I
$(objtree
)/arch
/$(SRCARCH
)/include/generated \
451 $(if
$(filter .
,$(srctree
)),,-I
$(srctree
)/include) \
452 -I
$(objtree
)/include \
455 KBUILD_AFLAGS
:= -D__ASSEMBLY__
-fno-PIE
456 KBUILD_CFLAGS
:= -Wall
-Wundef
-Werror
=strict-prototypes
-Wno-trigraphs \
457 -fno-strict-aliasing
-fno-common
-fshort-wchar
-fno-PIE \
458 -Werror
=implicit-function-declaration
-Werror
=implicit-int \
459 -Wno-format-security \
461 KBUILD_CPPFLAGS
:= -D__KERNEL__
462 KBUILD_AFLAGS_KERNEL
:=
463 KBUILD_CFLAGS_KERNEL
:=
464 KBUILD_AFLAGS_MODULE
:= -DMODULE
465 KBUILD_CFLAGS_MODULE
:= -DMODULE
466 KBUILD_LDFLAGS_MODULE
:= -T
$(srctree
)/scripts
/module-common.lds
468 GCC_PLUGINS_CFLAGS
:=
470 export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
471 export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
472 export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
473 export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
475 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
476 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
477 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
478 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
479 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
480 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
481 export KBUILD_ARFLAGS
483 # When compiling out-of-tree modules, put MODVERDIR in the module
484 # tree rather than in the kernel tree. The kernel tree might
486 export MODVERDIR
:= $(if
$(KBUILD_EXTMOD
),$(firstword $(KBUILD_EXTMOD
))/).tmp_versions
488 # Files to ignore in find ... statements
490 export RCS_FIND_IGNORE
:= \
( -name SCCS
-o
-name BitKeeper
-o
-name .svn
-o \
491 -name CVS
-o
-name .
pc -o
-name .hg
-o
-name .git \
) \
493 export RCS_TAR_IGNORE
:= --exclude SCCS
--exclude BitKeeper
--exclude .svn \
494 --exclude CVS
--exclude .
pc --exclude .hg
--exclude .git
496 # ===========================================================================
497 # Rules shared between *config targets and build targets
499 # Basic helpers built in scripts/basic/
500 PHONY
+= scripts_basic
502 $(Q
)$(MAKE
) $(build
)=scripts
/basic
503 $(Q
)rm -f .tmp_quiet_recordmcount
505 PHONY
+= outputmakefile
506 # outputmakefile generates a Makefile in the output directory, if using a
507 # separate output directory. This allows convenient use of make in the
509 # At the same time when output Makefile generated, generate .gitignore to
510 # ignore whole output directory
513 $(Q
)ln
-fsn
$(srctree
) source
514 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/mkmakefile
$(srctree
)
515 $(Q
)test -e .gitignore || \
516 { echo
"# this is build directory, ignore it"; echo
"*"; } > .gitignore
519 ifneq ($(shell $(CC
) --version
2>&1 | head
-n
1 | grep clang
),)
520 ifneq ($(CROSS_COMPILE
),)
521 CLANG_FLAGS
:= --target
=$(notdir $(CROSS_COMPILE
:%-=%))
522 GCC_TOOLCHAIN_DIR
:= $(dir $(shell which
$(CROSS_COMPILE
)elfedit
))
523 CLANG_FLAGS
+= --prefix=$(GCC_TOOLCHAIN_DIR
)
524 GCC_TOOLCHAIN
:= $(realpath
$(GCC_TOOLCHAIN_DIR
)/..
)
526 ifneq ($(GCC_TOOLCHAIN
),)
527 CLANG_FLAGS
+= --gcc-toolchain
=$(GCC_TOOLCHAIN
)
529 CLANG_FLAGS
+= -no-integrated-as
530 KBUILD_CFLAGS
+= $(CLANG_FLAGS
)
531 KBUILD_AFLAGS
+= $(CLANG_FLAGS
)
535 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
536 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
537 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
538 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
539 CC_VERSION_TEXT
= $(shell $(CC
) --version | head
-n
1)
541 ifeq ($(config-targets
),1)
542 # ===========================================================================
543 # *config targets only - make sure prerequisites are updated, and descend
544 # in scripts/kconfig to make the *config target
546 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
547 # KBUILD_DEFCONFIG may point out an alternative default configuration
548 # used for 'make defconfig'
549 include arch
/$(SRCARCH
)/Makefile
550 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
552 config
: scripts_basic outputmakefile FORCE
553 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
555 %config
: scripts_basic outputmakefile FORCE
556 $(Q
)$(MAKE
) $(build
)=scripts
/kconfig
$@
559 # ===========================================================================
560 # Build targets only - this includes vmlinux, arch specific targets, clean
561 # targets and others. In general all targets except *config targets.
563 # If building an external module we do not care about the all: rule
564 # but instead _all depend on modules
566 ifeq ($(KBUILD_EXTMOD
),)
572 # Decide whether to build built-in, modular, or both.
573 # Normally, just do built-in.
578 # If we have only "make modules", don't compile built-in objects.
579 # When we're building modules with modversions, we need to consider
580 # the built-in objects during the descend as well, in order to
581 # make sure the checksums are up to date before we record them.
583 ifeq ($(MAKECMDGOALS
),modules
)
584 KBUILD_BUILTIN
:= $(if
$(CONFIG_MODVERSIONS
),1)
587 # If we have "make <whatever> modules", compile modules
588 # in addition to whatever we do anyway.
589 # Just "make" or "make all" shall build modules as well
591 ifneq ($(filter all _all modules
,$(MAKECMDGOALS
)),)
595 ifeq ($(MAKECMDGOALS
),)
599 export KBUILD_MODULES KBUILD_BUILTIN
601 ifeq ($(KBUILD_EXTMOD
),)
602 # Objects we will link into vmlinux / subdirs we need to visit
604 drivers-y
:= drivers
/ sound
/
609 endif # KBUILD_EXTMOD
611 ifeq ($(dot-config
),1)
612 include include/config
/auto.conf
615 # The all: target is the default when no target is given on the
617 # This allow a user to issue only 'make' to build a kernel including modules
618 # Defaults to vmlinux, but the arch makefile usually adds further targets
621 CFLAGS_GCOV
:= -fprofile-arcs
-ftest-coverage \
622 $(call cc-option
,-fno-tree-loop-im
) \
623 $(call cc-disable-warning
,maybe-uninitialized
,)
626 # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later.
627 ifdef CONFIG_FUNCTION_TRACER
628 CC_FLAGS_FTRACE
:= -pg
631 RETPOLINE_CFLAGS_GCC
:= -mindirect-branch
=thunk-extern
-mindirect-branch-register
632 RETPOLINE_VDSO_CFLAGS_GCC
:= -mindirect-branch
=thunk-inline
-mindirect-branch-register
633 RETPOLINE_CFLAGS_CLANG
:= -mretpoline-external-thunk
634 RETPOLINE_VDSO_CFLAGS_CLANG
:= -mretpoline
635 RETPOLINE_CFLAGS
:= $(call cc-option
,$(RETPOLINE_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_CFLAGS_CLANG
)))
636 RETPOLINE_VDSO_CFLAGS
:= $(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_GCC
),$(call cc-option
,$(RETPOLINE_VDSO_CFLAGS_CLANG
)))
637 export RETPOLINE_CFLAGS
638 export RETPOLINE_VDSO_CFLAGS
640 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
641 # values of the respective KBUILD_* variables
645 include arch
/$(SRCARCH
)/Makefile
647 ifeq ($(dot-config
),1)
648 ifeq ($(may-sync-config
),1)
649 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
650 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
651 # because some architectures define CROSS_COMPILE there.
652 -include include/config
/auto.conf.cmd
656 @echo
>&2 '*** Configuration file "$@" not found!'
658 @echo
>&2 '*** Please run some configurator (e.g. "make oldconfig" or'
659 @echo
>&2 '*** "make menuconfig" or "make xconfig").'
663 # The actual configuration files used during the build are stored in
664 # include/generated/ and include/config/. Update them if .config is newer than
665 # include/config/auto.conf (which mirrors .config).
667 # This exploits the 'multi-target pattern rule' trick.
668 # The syncconfig should be executed only once to make all the targets.
669 %/auto.conf
%/auto.conf.cmd
%/tristate.conf
: $(KCONFIG_CONFIG
)
670 $(Q
)$(MAKE
) -f
$(srctree
)/Makefile syncconfig
672 # External modules and some install targets need include/generated/autoconf.h
673 # and include/config/auto.conf but do not care if they are up-to-date.
674 # Use auto.conf to trigger the test
675 PHONY
+= include/config
/auto.conf
677 include/config
/auto.conf
:
678 $(Q
)test -e
include/generated
/autoconf.h
-a
-e
$@ ||
( \
680 echo
>&2 " ERROR: Kernel configuration is invalid."; \
681 echo
>&2 " include/generated/autoconf.h or $@ are missing.";\
682 echo
>&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
686 endif # may-sync-config
687 endif # $(dot-config)
689 KBUILD_CFLAGS
+= $(call cc-option
,-fno-delete-null-pointer-checks
,)
690 KBUILD_CFLAGS
+= $(call cc-disable-warning
,frame-address
,)
691 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-truncation
)
692 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-overflow
)
693 KBUILD_CFLAGS
+= $(call cc-disable-warning
, int-in-bool-context
)
695 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
701 ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
702 KBUILD_CFLAGS
+= -Wno-maybe-uninitialized
705 # Tell gcc to never replace conditional load with a non-conditional one
706 KBUILD_CFLAGS
+= $(call cc-option
,--param
=allow-store-data-races
=0)
708 include scripts
/Makefile.kcov
709 include scripts
/Makefile.gcc-plugins
711 ifdef CONFIG_READABLE_ASM
712 # Disable optimizations that make assembler listings hard to read.
713 # reorder blocks reorders the control in the function
714 # ipa clone creates specialized cloned functions
715 # partial inlining inlines only parts of functions
716 KBUILD_CFLAGS
+= $(call cc-option
,-fno-reorder-blocks
,) \
717 $(call cc-option
,-fno-ipa-cp-clone
,) \
718 $(call cc-option
,-fno-partial-inlining
)
721 ifneq ($(CONFIG_FRAME_WARN
),0)
722 KBUILD_CFLAGS
+= $(call cc-option
,-Wframe-larger-than
=${CONFIG_FRAME_WARN})
725 stackp-flags-
$(CONFIG_CC_HAS_STACKPROTECTOR_NONE
) := -fno-stack-protector
726 stackp-flags-
$(CONFIG_STACKPROTECTOR
) := -fstack-protector
727 stackp-flags-
$(CONFIG_STACKPROTECTOR_STRONG
) := -fstack-protector-strong
729 KBUILD_CFLAGS
+= $(stackp-flags-y
)
731 ifdef CONFIG_CC_IS_CLANG
732 KBUILD_CPPFLAGS
+= $(call cc-option
,-Qunused-arguments
,)
733 KBUILD_CFLAGS
+= $(call cc-disable-warning
, format-invalid-specifier
)
734 KBUILD_CFLAGS
+= $(call cc-disable-warning
, gnu
)
735 KBUILD_CFLAGS
+= $(call cc-disable-warning
, address-of-packed-member
)
736 # Quiet clang warning: comparison of unsigned expression < 0 is always false
737 KBUILD_CFLAGS
+= $(call cc-disable-warning
, tautological-compare
)
738 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
739 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
740 # See modpost pattern 2
741 KBUILD_CFLAGS
+= $(call cc-option
, -mno-global-merge
,)
742 KBUILD_CFLAGS
+= $(call cc-option
, -fcatch-undefined-behavior
)
745 # These warnings generated too much noise in a regular build.
746 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
747 KBUILD_CFLAGS
+= -Wno-unused-but-set-variable
750 KBUILD_CFLAGS
+= $(call cc-disable-warning
, unused-const-variable
)
751 ifdef CONFIG_FRAME_POINTER
752 KBUILD_CFLAGS
+= -fno-omit-frame-pointer
-fno-optimize-sibling-calls
754 # Some targets (ARM with Thumb2, for example), can't be built with frame
755 # pointers. For those, we don't have FUNCTION_TRACER automatically
756 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
757 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
758 # -fomit-frame-pointer with FUNCTION_TRACER.
759 ifndef CONFIG_FUNCTION_TRACER
760 KBUILD_CFLAGS
+= -fomit-frame-pointer
764 DEBUG_CFLAGS
:= $(call cc-option
, -fno-var-tracking-assignments
)
766 ifdef CONFIG_DEBUG_INFO
767 ifdef CONFIG_DEBUG_INFO_SPLIT
768 DEBUG_CFLAGS
+= -gsplit-dwarf
772 KBUILD_AFLAGS
+= -Wa
,-gdwarf-2
774 ifdef CONFIG_DEBUG_INFO_DWARF4
775 DEBUG_CFLAGS
+= -gdwarf-4
778 ifdef CONFIG_DEBUG_INFO_REDUCED
779 DEBUG_CFLAGS
+= $(call cc-option
, -femit-struct-debug-baseonly
) \
780 $(call cc-option
,-fno-var-tracking
)
783 KBUILD_CFLAGS
+= $(DEBUG_CFLAGS
)
786 ifdef CONFIG_FUNCTION_TRACER
787 ifdef CONFIG_FTRACE_MCOUNT_RECORD
788 # gcc 5 supports generating the mcount tables directly
789 ifeq ($(call cc-option-yn
,-mrecord-mcount
),y
)
790 CC_FLAGS_FTRACE
+= -mrecord-mcount
791 export CC_USING_RECORD_MCOUNT
:= 1
793 ifdef CONFIG_HAVE_NOP_MCOUNT
794 ifeq ($(call cc-option-yn
, -mnop-mcount
),y
)
795 CC_FLAGS_FTRACE
+= -mnop-mcount
796 CC_FLAGS_USING
+= -DCC_USING_NOP_MCOUNT
800 ifdef CONFIG_HAVE_FENTRY
801 ifeq ($(call cc-option-yn
, -mfentry
),y
)
802 CC_FLAGS_FTRACE
+= -mfentry
803 CC_FLAGS_USING
+= -DCC_USING_FENTRY
806 export CC_FLAGS_FTRACE
807 KBUILD_CFLAGS
+= $(CC_FLAGS_FTRACE
) $(CC_FLAGS_USING
)
808 KBUILD_AFLAGS
+= $(CC_FLAGS_USING
)
809 ifdef CONFIG_DYNAMIC_FTRACE
810 ifdef CONFIG_HAVE_C_RECORDMCOUNT
811 BUILD_C_RECORDMCOUNT
:= y
812 export BUILD_C_RECORDMCOUNT
817 # We trigger additional mismatches with less inlining
818 ifdef CONFIG_DEBUG_SECTION_MISMATCH
819 KBUILD_CFLAGS
+= $(call cc-option
, -fno-inline-functions-called-once
)
822 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
823 KBUILD_CFLAGS_KERNEL
+= -ffunction-sections
-fdata-sections
824 LDFLAGS_vmlinux
+= --gc-sections
827 # arch Makefile may override CC so keep this after arch Makefile is included
828 NOSTDINC_FLAGS
+= -nostdinc
-isystem
$(shell $(CC
) -print-file-name
=include)
830 # warn about C99 declaration after statement
831 KBUILD_CFLAGS
+= -Wdeclaration-after-statement
833 # Variable Length Arrays (VLAs) should not be used anywhere in the kernel
834 KBUILD_CFLAGS
+= $(call cc-option
,-Wvla
)
836 # disable pointer signed / unsigned warnings in gcc 4.0
837 KBUILD_CFLAGS
+= -Wno-pointer-sign
839 # disable stringop warnings in gcc 8+
840 KBUILD_CFLAGS
+= $(call cc-disable-warning
, stringop-truncation
)
842 # disable invalid "can't wrap" optimizations for signed / pointers
843 KBUILD_CFLAGS
+= $(call cc-option
,-fno-strict-overflow
)
845 # clang sets -fmerge-all-constants by default as optimization, but this
846 # is non-conforming behavior for C and in fact breaks the kernel, so we
847 # need to disable it here generally.
848 KBUILD_CFLAGS
+= $(call cc-option
,-fno-merge-all-constants
)
850 # for gcc -fno-merge-all-constants disables everything, but it is fine
851 # to have actual conforming behavior enabled.
852 KBUILD_CFLAGS
+= $(call cc-option
,-fmerge-constants
)
854 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
855 KBUILD_CFLAGS
+= $(call cc-option
,-fno-stack-check
,)
857 # conserve stack if available
858 KBUILD_CFLAGS
+= $(call cc-option
,-fconserve-stack
)
860 # Prohibit date/time macros, which would make the build non-deterministic
861 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=date-time
)
863 # enforce correct pointer usage
864 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=incompatible-pointer-types
)
866 # Require designated initializers for all marked structures
867 KBUILD_CFLAGS
+= $(call cc-option
,-Werror
=designated-init
)
869 # change __FILE__ to the relative path from the srctree
870 KBUILD_CFLAGS
+= $(call cc-option
,-fmacro-prefix-map
=$(srctree
)/=)
872 # use the deterministic mode of AR if available
873 KBUILD_ARFLAGS
:= $(call ar-option
,D
)
875 include scripts
/Makefile.kasan
876 include scripts
/Makefile.extrawarn
877 include scripts
/Makefile.ubsan
879 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
881 KBUILD_CPPFLAGS
+= $(ARCH_CPPFLAGS
) $(KCPPFLAGS
)
882 KBUILD_AFLAGS
+= $(ARCH_AFLAGS
) $(KAFLAGS
)
883 KBUILD_CFLAGS
+= $(ARCH_CFLAGS
) $(KCFLAGS
)
885 # Use --build-id when available.
886 LDFLAGS_BUILD_ID
:= $(call ld-option
, --build-id
)
887 KBUILD_LDFLAGS_MODULE
+= $(LDFLAGS_BUILD_ID
)
888 LDFLAGS_vmlinux
+= $(LDFLAGS_BUILD_ID
)
890 ifeq ($(CONFIG_STRIP_ASM_SYMS
),y
)
891 LDFLAGS_vmlinux
+= $(call ld-option
, -X
,)
894 # insure the checker run with the right endianness
895 CHECKFLAGS
+= $(if
$(CONFIG_CPU_BIG_ENDIAN
),-mbig-endian
,-mlittle-endian
)
897 # the checker needs the correct machine size
898 CHECKFLAGS
+= $(if
$(CONFIG_64BIT
),-m64
,-m32
)
900 # Default kernel image to build when no specific target is given.
901 # KBUILD_IMAGE may be overruled on the command line or
902 # set in the environment
903 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
905 export KBUILD_IMAGE ?
= vmlinux
908 # INSTALL_PATH specifies where to place the updated kernel and system map
909 # images. Default is /boot, but you can set it to other values
910 export INSTALL_PATH ?
= /boot
913 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
914 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
915 # an argument if needed. Otherwise it defaults to the kernel install path
917 export INSTALL_DTBS_PATH ?
= $(INSTALL_PATH
)/dtbs
/$(KERNELRELEASE
)
920 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
921 # relocations required by build roots. This is not defined in the
922 # makefile but the argument can be passed to make if needed.
925 MODLIB
= $(INSTALL_MOD_PATH
)/lib
/modules
/$(KERNELRELEASE
)
929 # INSTALL_MOD_STRIP, if defined, will cause modules to be
930 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
931 # the default option --strip-debug will be used. Otherwise,
932 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
934 ifdef INSTALL_MOD_STRIP
935 ifeq ($(INSTALL_MOD_STRIP
),1)
936 mod_strip_cmd
= $(STRIP
) --strip-debug
938 mod_strip_cmd
= $(STRIP
) $(INSTALL_MOD_STRIP
)
939 endif # INSTALL_MOD_STRIP=1
942 endif # INSTALL_MOD_STRIP
945 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
946 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
947 # or CONFIG_MODULE_COMPRESS_XZ.
949 mod_compress_cmd
= true
950 ifdef CONFIG_MODULE_COMPRESS
951 ifdef CONFIG_MODULE_COMPRESS_GZIP
952 mod_compress_cmd
= gzip
-n
-f
953 endif # CONFIG_MODULE_COMPRESS_GZIP
954 ifdef CONFIG_MODULE_COMPRESS_XZ
955 mod_compress_cmd
= xz
-f
956 endif # CONFIG_MODULE_COMPRESS_XZ
957 endif # CONFIG_MODULE_COMPRESS
958 export mod_compress_cmd
960 ifdef CONFIG_MODULE_SIG_ALL
961 $(eval
$(call config_filename
,MODULE_SIG_KEY
))
963 mod_sign_cmd
= scripts
/sign-file
$(CONFIG_MODULE_SIG_HASH
) $(MODULE_SIG_KEY_SRCPREFIX
)$(CONFIG_MODULE_SIG_KEY
) certs
/signing_key.x509
969 HOST_LIBELF_LIBS
= $(shell pkg-config libelf
--libs
2>/dev
/null || echo
-lelf
)
971 ifdef CONFIG_STACK_VALIDATION
972 has_libelf
:= $(call try-run
,\
973 echo
"int main() {}" |
$(HOSTCC
) -xc
-o
/dev
/null
$(HOST_LIBELF_LIBS
) -,1,0)
974 ifeq ($(has_libelf
),1)
975 objtool_target
:= tools
/objtool FORCE
977 SKIP_STACK_VALIDATION
:= 1
978 export SKIP_STACK_VALIDATION
984 ifeq ($(KBUILD_EXTMOD
),)
985 core-y
+= kernel
/ certs
/ mm
/ fs
/ ipc
/ security
/ crypto
/ block
/
987 vmlinux-dirs
:= $(patsubst %/,%,$(filter %/, $(init-y
) $(init-m
) \
988 $(core-y
) $(core-m
) $(drivers-y
) $(drivers-m
) \
989 $(net-y
) $(net-m
) $(libs-y
) $(libs-m
) $(virt-y
)))
991 vmlinux-alldirs
:= $(sort $(vmlinux-dirs
) $(patsubst %/,%,$(filter %/, \
992 $(init-
) $(core-
) $(drivers-
) $(net-
) $(libs-
) $(virt-
))))
994 init-y
:= $(patsubst %/, %/built-in.a
, $(init-y
))
995 core-y
:= $(patsubst %/, %/built-in.a
, $(core-y
))
996 drivers-y
:= $(patsubst %/, %/built-in.a
, $(drivers-y
))
997 net-y
:= $(patsubst %/, %/built-in.a
, $(net-y
))
998 libs-y1
:= $(patsubst %/, %/lib.a
, $(libs-y
))
999 libs-y2
:= $(patsubst %/, %/built-in.a
, $(filter-out %.a
, $(libs-y
)))
1000 virt-y
:= $(patsubst %/, %/built-in.a
, $(virt-y
))
1002 # Externally visible symbols (used by link-vmlinux.sh)
1003 export KBUILD_VMLINUX_OBJS
:= $(head-y
) $(init-y
) $(core-y
) $(libs-y2
) \
1004 $(drivers-y
) $(net-y
) $(virt-y
)
1005 export KBUILD_VMLINUX_LIBS
:= $(libs-y1
)
1006 export KBUILD_LDS
:= arch
/$(SRCARCH
)/kernel
/vmlinux.lds
1007 export LDFLAGS_vmlinux
1008 # used by scripts/package/Makefile
1009 export KBUILD_ALLDIRS
:= $(sort $(filter-out arch
/%,$(vmlinux-alldirs
)) arch Documentation
include samples scripts tools
)
1011 vmlinux-deps
:= $(KBUILD_LDS
) $(KBUILD_VMLINUX_OBJS
) $(KBUILD_VMLINUX_LIBS
)
1013 # Recurse until adjust_autoksyms.sh is satisfied
1014 PHONY
+= autoksyms_recursive
1015 autoksyms_recursive
: $(vmlinux-deps
)
1016 ifdef CONFIG_TRIM_UNUSED_KSYMS
1017 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/adjust_autoksyms.sh \
1018 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1021 # For the kernel to actually contain only the needed exported symbols,
1022 # we have to build modules as well to determine what those symbols are.
1023 # (this can be evaluated only once include/config/auto.conf has been included)
1024 ifdef CONFIG_TRIM_UNUSED_KSYMS
1028 autoksyms_h
:= $(if
$(CONFIG_TRIM_UNUSED_KSYMS
), include/generated
/autoksyms.h
)
1031 $(Q
)mkdir
-p
$(dir $@
)
1034 ARCH_POSTLINK
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/Makefile.postlink
)
1036 # Final link of vmlinux with optional arch pass after final link
1037 cmd_link-vmlinux
= \
1038 $(CONFIG_SHELL
) $< $(LD
) $(KBUILD_LDFLAGS
) $(LDFLAGS_vmlinux
) ; \
1039 $(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) $@
, true
)
1041 vmlinux
: scripts
/link-vmlinux.sh autoksyms_recursive
$(vmlinux-deps
) FORCE
1042 +$(call if_changed
,link-vmlinux
)
1046 # Build samples along the rest of the kernel. This needs headers_install.
1047 ifdef CONFIG_SAMPLES
1048 vmlinux-dirs
+= samples
1049 samples
: headers_install
1052 # The actual objects are generated when descending,
1053 # make sure no implicit rule kicks in
1054 $(sort $(vmlinux-deps
)): $(vmlinux-dirs
) ;
1056 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1057 # Preset locale variables to speed up the build process. Limit locale
1058 # tweaks to this spot to avoid wrong language settings when running
1059 # make menuconfig etc.
1060 # Error messages still appears in the original language
1062 PHONY
+= $(vmlinux-dirs
)
1063 $(vmlinux-dirs
): prepare
1064 $(Q
)$(MAKE
) $(build
)=$@ need-builtin
=1
1066 filechk_kernel.release
= \
1067 echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1069 # Store (new) KERNELRELEASE string in include/config/kernel.release
1070 include/config
/kernel.release
: $(srctree
)/Makefile FORCE
1071 $(call filechk
,kernel.release
)
1073 # Additional helpers built in scripts/
1074 # Carefully list dependencies so we do not try to build scripts twice
1077 scripts
: scripts_basic scripts_dtc
1078 $(Q
)$(MAKE
) $(build
)=$(@
)
1080 # Things we need to do before we recursively start building the kernel
1081 # or the modules are listed in "prepare".
1082 # A multi level approach is used. prepareN is processed before prepareN-1.
1083 # archprepare is used in arch Makefiles and when processed asm symlink,
1084 # version.h and scripts_basic is processed / created.
1086 PHONY
+= prepare archprepare prepare1 prepare3
1088 # prepare3 is used to check if we are building in a separate output directory,
1090 # 1) Check that make has not been executed in the kernel src $(srctree)
1091 prepare3
: include/config
/kernel.release
1092 ifneq ($(srctree
),.
)
1093 @
$(kecho
) ' Using $(srctree) as source for kernel'
1094 $(Q
)if
[ -f
$(srctree
)/.config
-o
-d
$(srctree
)/include/config
]; then \
1095 echo
>&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1096 echo
>&2 " in the '$(srctree)' directory.";\
1101 prepare1
: prepare3 outputmakefile asm-generic
$(version_h
) $(autoksyms_h
) \
1102 include/generated
/utsrelease.h
1105 archprepare
: archheaders archscripts prepare1 scripts
1107 prepare0
: archprepare
1108 $(Q
)$(MAKE
) $(build
)=scripts
/mod
1109 $(Q
)$(MAKE
) $(build
)=.
1111 # All the preparing..
1112 prepare
: prepare0 prepare-objtool
1114 # Support for using generic headers in asm-generic
1115 asm-generic
:= -f
$(srctree
)/scripts
/Makefile.asm-generic obj
1117 PHONY
+= asm-generic uapi-asm-generic
1118 asm-generic
: uapi-asm-generic
1119 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/asm \
1120 generic
=include/asm-generic
1122 $(Q
)$(MAKE
) $(asm-generic
)=arch
/$(SRCARCH
)/include/generated
/uapi
/asm \
1123 generic
=include/uapi
/asm-generic
1125 PHONY
+= prepare-objtool
1126 prepare-objtool
: $(objtool_target
)
1127 ifeq ($(SKIP_STACK_VALIDATION
),1)
1128 ifdef CONFIG_UNWINDER_ORC
1129 @echo
"error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1132 @echo
"warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2
1136 # Generate some files
1137 # ---------------------------------------------------------------------------
1139 # KERNELRELEASE can change from a few different places, meaning version.h
1140 # needs to be updated, so this check is forced on all builds
1143 define filechk_utsrelease.h
1144 if
[ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt
$(uts_len
) ]; then \
1145 echo
'"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1148 echo \
#define UTS_RELEASE \"$(KERNELRELEASE)\"
1151 define filechk_version.h
1152 echo \
#define LINUX_VERSION_CODE $(shell \
1153 expr
$(VERSION
) \
* 65536 + 0$(PATCHLEVEL
) \
* 256 + 0$(SUBLEVEL
)); \
1154 echo
'#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'
1158 $(call filechk
,version.h
)
1159 $(Q
)rm -f
$(old_version_h
)
1161 include/generated
/utsrelease.h
: include/config
/kernel.release FORCE
1162 $(call filechk
,utsrelease.h
)
1166 $(Q
)find
$(srctree
)/include/ -name
'*.h' | xargs
--max-args
1 \
1167 $(srctree
)/scripts
/headerdep.pl
-I
$(srctree
)/include
1169 # ---------------------------------------------------------------------------
1172 #Default location for installed headers
1173 export INSTALL_HDR_PATH
= $(objtree
)/usr
1175 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1176 hdr-dst
= $(if
$(KBUILD_HEADERS
), dst
=include/arch-
$(SRCARCH
), dst
=include)
1178 PHONY
+= archheaders archscripts
1181 __headers
: $(version_h
) scripts_basic uapi-asm-generic archheaders archscripts
1182 $(Q
)$(MAKE
) $(build
)=scripts build_unifdef
1184 PHONY
+= headers_install_all
1185 headers_install_all
:
1186 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
install
1188 PHONY
+= headers_install
1189 headers_install
: __headers
1190 $(if
$(wildcard $(srctree
)/arch
/$(SRCARCH
)/include/uapi
/asm
/Kbuild
),, \
1191 $(error Headers not exportable for the
$(SRCARCH
) architecture
))
1192 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi dst
=include
1193 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(SRCARCH
)/include/uapi
$(hdr-dst
)
1195 PHONY
+= headers_check_all
1196 headers_check_all
: headers_install_all
1197 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/headers.sh
check
1199 PHONY
+= headers_check
1200 headers_check
: headers_install
1201 $(Q
)$(MAKE
) $(hdr-inst
)=include/uapi dst
=include HDRCHECK
=1
1202 $(Q
)$(MAKE
) $(hdr-inst
)=arch
/$(SRCARCH
)/include/uapi
$(hdr-dst
) HDRCHECK
=1
1204 ifdef CONFIG_HEADERS_CHECK
1208 # ---------------------------------------------------------------------------
1213 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests run_tests
1215 PHONY
+= kselftest-clean
1217 $(Q
)$(MAKE
) -C
$(srctree
)/tools
/testing
/selftests
clean
1219 PHONY
+= kselftest-merge
1221 $(if
$(wildcard $(objtree
)/.config
),, $(error No .config exists
, config your kernel first
!))
1222 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/kconfig
/merge_config.sh \
1223 -m
$(objtree
)/.config \
1224 $(srctree
)/tools
/testing
/selftests
/*/config
1225 +$(Q
)$(MAKE
) -f
$(srctree
)/Makefile olddefconfig
1227 # ---------------------------------------------------------------------------
1230 ifneq ($(wildcard $(srctree
)/arch
/$(SRCARCH
)/boot
/dts
/),)
1231 dtstree
:= arch
/$(SRCARCH
)/boot
/dts
1236 %.dtb
: prepare3 scripts_dtc
1237 $(Q
)$(MAKE
) $(build
)=$(dtstree
) $(dtstree
)/$@
1239 PHONY
+= dtbs dtbs_install dt_binding_check
1240 dtbs dtbs_check
: prepare3 scripts_dtc
1241 $(Q
)$(MAKE
) $(build
)=$(dtstree
)
1243 dtbs_check
: export CHECK_DTBS
=1
1244 dtbs_check
: dt_binding_check
1247 $(Q
)$(MAKE
) $(dtbinst
)=$(dtstree
)
1249 ifdef CONFIG_OF_EARLY_FLATTREE
1255 PHONY
+= scripts_dtc
1256 scripts_dtc
: scripts_basic
1257 $(Q
)$(MAKE
) $(build
)=scripts
/dtc
1259 dt_binding_check
: scripts_dtc
1260 $(Q
)$(MAKE
) $(build
)=Documentation
/devicetree
/bindings
1262 # ---------------------------------------------------------------------------
1265 ifdef CONFIG_MODULES
1267 # By default, build modules as well
1273 # A module can be listed more than once in obj-m resulting in
1274 # duplicate lines in modules.order files. Those are removed
1275 # using awk while concatenating to the final file.
1278 modules
: $(vmlinux-dirs
) $(if
$(KBUILD_BUILTIN
),vmlinux
) modules.builtin
1279 $(Q
)$(AWK
) '!x[$$0]++' $(vmlinux-dirs
:%=$(objtree
)/%/modules.order
) > $(objtree
)/modules.order
1280 @
$(kecho
) ' Building modules, stage 2.';
1281 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1283 modules.builtin
: $(vmlinux-dirs
:%=%/modules.builtin
)
1284 $(Q
)$(AWK
) '!x[$$0]++' $^
> $(objtree
)/modules.builtin
1286 %/modules.builtin
: include/config
/auto.conf
include/config
/tristate.conf
1287 $(Q
)$(MAKE
) $(modbuiltin
)=$*
1290 # Target to prepare building external modules
1291 PHONY
+= modules_prepare
1292 modules_prepare
: prepare
1294 # Target to install modules
1295 PHONY
+= modules_install
1296 modules_install
: _modinst_ _modinst_post
1300 @
rm -rf
$(MODLIB
)/kernel
1301 @
rm -f
$(MODLIB
)/source
1302 @mkdir
-p
$(MODLIB
)/kernel
1303 @ln
-s
$(abspath
$(srctree
)) $(MODLIB
)/source
1304 @if
[ ! $(objtree
) -ef
$(MODLIB
)/build
]; then \
1305 rm -f
$(MODLIB
)/build
; \
1306 ln
-s
$(CURDIR
) $(MODLIB
)/build
; \
1308 @cp
-f
$(objtree
)/modules.order
$(MODLIB
)/
1309 @cp
-f
$(objtree
)/modules.builtin
$(MODLIB
)/
1310 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1312 # This depmod is only for convenience to give the initial
1313 # boot a modules.dep even before / is mounted read-write. However the
1314 # boot script depmod is the master version.
1315 PHONY
+= _modinst_post
1316 _modinst_post
: _modinst_
1319 ifeq ($(CONFIG_MODULE_SIG
), y
)
1320 PHONY
+= modules_sign
1322 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modsign
1325 else # CONFIG_MODULES
1327 # Modules not configured
1328 # ---------------------------------------------------------------------------
1330 PHONY
+= modules modules_install
1331 modules modules_install
:
1333 @echo
>&2 "The present kernel configuration has modules disabled."
1334 @echo
>&2 "Type 'make config' and enable loadable module support."
1335 @echo
>&2 "Then build a kernel with module support enabled."
1339 endif # CONFIG_MODULES
1342 # Cleaning is done on three levels.
1343 # make clean Delete most generated files
1344 # Leave enough to build external modules
1345 # make mrproper Delete the current configuration, and all generated files
1346 # make distclean Remove editor backup files, patch leftover files and the like
1348 # Directories & files removed with 'make clean'
1349 CLEAN_DIRS
+= $(MODVERDIR
) include/ksym
1351 # Directories & files removed with 'make mrproper'
1352 MRPROPER_DIRS
+= include/config usr
/include include/generated \
1353 arch
/*/include/generated .tmp_objdiff
1354 MRPROPER_FILES
+= .config .config.old .version \
1355 Module.symvers
tags TAGS cscope
* GPATH GTAGS GRTAGS GSYMS \
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
1360 # clean - Delete most, but leave enough to build external modules
1362 clean: rm-dirs
:= $(CLEAN_DIRS
)
1363 clean: rm-files
:= $(CLEAN_FILES
)
1364 clean-dirs
:= $(addprefix _clean_
, .
$(vmlinux-alldirs
) Documentation samples
)
1366 PHONY
+= $(clean-dirs
) clean archclean vmlinuxclean
1368 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1371 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/link-vmlinux.sh
clean
1372 $(Q
)$(if
$(ARCH_POSTLINK
), $(MAKE
) -f
$(ARCH_POSTLINK
) clean)
1374 clean: archclean vmlinuxclean
1376 # mrproper - Delete all generated files, including .config
1378 mrproper
: rm-dirs
:= $(wildcard $(MRPROPER_DIRS
))
1379 mrproper
: rm-files
:= $(wildcard $(MRPROPER_FILES
))
1380 mrproper-dirs
:= $(addprefix _mrproper_
,scripts
)
1382 PHONY
+= $(mrproper-dirs
) mrproper
1384 $(Q
)$(MAKE
) $(clean)=$(patsubst _mrproper_
%,%,$@
)
1386 mrproper
: clean $(mrproper-dirs
)
1395 @find
$(srctree
) $(RCS_FIND_IGNORE
) \
1396 \
( -name
'*.orig' -o
-name
'*.rej' -o
-name
'*~' \
1397 -o
-name
'*.bak' -o
-name
'#*#' -o
-name
'*%' \
1398 -o
-name
'core' \
) \
1399 -type f
-print | xargs
rm -f
1402 # Packaging of the kernel to various formats
1403 # ---------------------------------------------------------------------------
1404 package-dir
:= scripts
/package
1407 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1408 %pkg
: include/config
/kernel.release FORCE
1409 $(Q
)$(MAKE
) $(build
)=$(package-dir
) $@
1412 # Brief documentation of the typical targets used
1413 # ---------------------------------------------------------------------------
1415 boards
:= $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*_defconfig
)
1416 boards
:= $(sort $(notdir $(boards
)))
1417 board-dirs
:= $(dir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/*/*_defconfig
))
1418 board-dirs
:= $(sort $(notdir $(board-dirs
:/=)))
1422 @echo
'Cleaning targets:'
1423 @echo
' clean - Remove most generated files but keep the config and'
1424 @echo
' enough build support to build external modules'
1425 @echo
' mrproper - Remove all generated files + config + various backup files'
1426 @echo
' distclean - mrproper + remove editor backup and patch files'
1428 @echo
'Configuration targets:'
1429 @
$(MAKE
) -f
$(srctree
)/scripts
/kconfig
/Makefile help
1431 @echo
'Other generic targets:'
1432 @echo
' all - Build all targets marked with [*]'
1433 @echo
'* vmlinux - Build the bare kernel'
1434 @echo
'* modules - Build all modules'
1435 @echo
' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1436 @echo
' dir/ - Build all files in dir and below'
1437 @echo
' dir/file.[ois] - Build specified target only'
1438 @echo
' dir/file.ll - Build the LLVM assembly file'
1439 @echo
' (requires compiler support for LLVM assembly generation)'
1440 @echo
' dir/file.lst - Build specified mixed source/assembly target only'
1441 @echo
' (requires a recent binutils and recent build (System.map))'
1442 @echo
' dir/file.ko - Build module including final link'
1443 @echo
' modules_prepare - Set up for building external modules'
1444 @echo
' tags/TAGS - Generate tags file for editors'
1445 @echo
' cscope - Generate cscope index'
1446 @echo
' gtags - Generate GNU GLOBAL index'
1447 @echo
' kernelrelease - Output the release version string (use with make -s)'
1448 @echo
' kernelversion - Output the version stored in Makefile (use with make -s)'
1449 @echo
' image_name - Output the image name (use with make -s)'
1450 @echo
' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1451 echo
' (default: $(INSTALL_HDR_PATH))'; \
1453 @echo
'Static analysers:'
1454 @echo
' checkstack - Generate a list of stack hogs'
1455 @echo
' namespacecheck - Name space analysis on compiled kernel'
1456 @echo
' versioncheck - Sanity check on version.h usage'
1457 @echo
' includecheck - Check for duplicate included header files'
1458 @echo
' export_report - List the usages of all exported symbols'
1459 @echo
' headers_check - Sanity check on exported headers'
1460 @echo
' headerdep - Detect inclusion cycles in headers'
1461 @echo
' coccicheck - Check with Coccinelle'
1463 @echo
'Kernel selftest:'
1464 @echo
' kselftest - Build and run kernel selftest (run as root)'
1465 @echo
' Build, install, and boot kernel before'
1466 @echo
' running kselftest on it'
1467 @echo
' kselftest-clean - Remove all generated kselftest files'
1468 @echo
' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1472 echo
'Devicetree:'; \
1473 echo
'* dtbs - Build device tree blobs for enabled boards'; \
1474 echo
' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
1477 @echo
'Userspace tools targets:'
1478 @echo
' use "make tools/help"'
1479 @echo
' or "cd tools; make help"'
1481 @echo
'Kernel packaging:'
1482 @
$(MAKE
) $(build
)=$(package-dir
) help
1484 @echo
'Documentation targets:'
1485 @
$(MAKE
) -f
$(srctree
)/Documentation
/Makefile dochelp
1487 @echo
'Architecture specific targets ($(SRCARCH)):'
1488 @
$(if
$(archhelp
),$(archhelp
),\
1489 echo
' No architecture specific help defined for $(SRCARCH)')
1492 $(foreach b
, $(boards
), \
1493 printf
" %-24s - Build for %s\\n" $(b
) $(subst _defconfig
,,$(b
));) \
1495 @
$(if
$(board-dirs
), \
1496 $(foreach b
, $(board-dirs
), \
1497 printf
" %-16s - Show %s-specific targets\\n" help-
$(b
) $(b
);) \
1498 printf
" %-16s - Show all of the above\\n" help-boards
; \
1501 @echo
' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1502 @echo
' make V=2 [targets] 2 => give reason for rebuild of target'
1503 @echo
' make O=dir [targets] Locate all output files in "dir", including .config'
1504 @echo
' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1505 @echo
' make C=2 [targets] Force check of all c source with $$CHECK'
1506 @echo
' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1507 @echo
' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1508 @echo
' 1: warnings which may be relevant and do not occur too often'
1509 @echo
' 2: warnings which occur quite often but may still be relevant'
1510 @echo
' 3: more obscure warnings, can most likely be ignored'
1511 @echo
' Multiple levels can be combined with W=12 or W=123'
1513 @echo
'Execute "make" or "make all" to build all targets marked with [*] '
1514 @echo
'For further info see the ./README file'
1517 help-board-dirs
:= $(addprefix help-
,$(board-dirs
))
1519 help-boards
: $(help-board-dirs
)
1521 boards-per-dir
= $(sort $(notdir $(wildcard $(srctree
)/arch
/$(SRCARCH
)/configs
/$*/*_defconfig
)))
1523 $(help-board-dirs
): help-
%:
1524 @echo
'Architecture specific targets ($(SRCARCH) $*):'
1525 @
$(if
$(boards-per-dir
), \
1526 $(foreach b
, $(boards-per-dir
), \
1527 printf
" %-24s - Build for %s\\n" $*/$(b
) $(subst _defconfig
,,$(b
));) \
1531 # Documentation targets
1532 # ---------------------------------------------------------------------------
1533 DOC_TARGETS
:= xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1534 linkcheckdocs dochelp refcheckdocs
1535 PHONY
+= $(DOC_TARGETS
)
1536 $(DOC_TARGETS
): scripts_basic FORCE
1537 $(Q
)$(MAKE
) $(build
)=Documentation
$@
1540 # ---------------------------------------------------------------------------
1542 PHONY
+= scripts_gdb
1543 scripts_gdb
: prepare
1544 $(Q
)$(MAKE
) $(build
)=scripts
/gdb
1545 $(Q
)ln
-fsn
$(abspath
$(srctree
)/scripts
/gdb
/vmlinux-gdb.py
)
1547 ifdef CONFIG_GDB_SCRIPTS
1551 else # KBUILD_EXTMOD
1554 # External module support.
1555 # When building external modules the kernel used as basis is considered
1556 # read-only, and no consistency checks are made and the make
1557 # system is not used on the basis kernel. If updates are required
1558 # in the basis kernel ordinary make commands (without M=...) must
1561 # The following are the only valid targets when building external
1563 # make M=dir clean Delete all automatically generated files
1564 # make M=dir modules Make all modules in specified dir
1565 # make M=dir Same as 'make M=dir modules'
1566 # make M=dir modules_install
1567 # Install the modules built in the module directory
1568 # Assumes install directory is already created
1570 # We are always building modules
1573 PHONY
+= $(objtree
)/Module.symvers
1574 $(objtree
)/Module.symvers
:
1575 @
test -e
$(objtree
)/Module.symvers ||
( \
1577 echo
" WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1578 echo
" is missing; modules will have no dependencies and modversions."; \
1581 module-dirs
:= $(addprefix _module_
,$(KBUILD_EXTMOD
))
1582 PHONY
+= $(module-dirs
) modules
1583 $(module-dirs
): prepare
$(objtree
)/Module.symvers
1584 $(Q
)$(MAKE
) $(build
)=$(patsubst _module_
%,%,$@
)
1586 modules
: $(module-dirs
)
1587 @
$(kecho
) ' Building modules, stage 2.';
1588 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1590 PHONY
+= modules_install
1591 modules_install
: _emodinst_ _emodinst_post
1593 install-dir
:= $(if
$(INSTALL_MOD_DIR
),$(INSTALL_MOD_DIR
),extra
)
1596 $(Q
)mkdir
-p
$(MODLIB
)/$(install-dir
)
1597 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modinst
1599 PHONY
+= _emodinst_post
1600 _emodinst_post
: _emodinst_
1603 clean-dirs
:= $(addprefix _clean_
,$(KBUILD_EXTMOD
))
1605 PHONY
+= $(clean-dirs
) clean
1607 $(Q
)$(MAKE
) $(clean)=$(patsubst _clean_
%,%,$@
)
1609 clean: rm-dirs
:= $(MODVERDIR
)
1610 clean: rm-files
:= $(KBUILD_EXTMOD
)/Module.symvers
1614 @echo
' Building external modules.'
1615 @echo
' Syntax: make -C path/to/kernel/src M=$$PWD target'
1617 @echo
' modules - default target, build the module(s)'
1618 @echo
' modules_install - install the module'
1619 @echo
' clean - remove generated files in module directory only'
1625 endif # KBUILD_EXTMOD
1627 clean: $(clean-dirs
)
1630 @find
$(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
), .
) $(RCS_FIND_IGNORE
) \
1631 \
( -name
'*.[aios]' -o
-name
'*.ko' -o
-name
'.*.cmd' \
1633 -o
-name
'*.dtb' -o
-name
'*.dtb.S' -o
-name
'*.dt.yaml' \
1634 -o
-name
'*.dwo' -o
-name
'*.lst' \
1636 -o
-name
'.*.d' -o
-name
'.*.tmp' -o
-name
'*.mod.c' \
1637 -o
-name
'*.lex.c' -o
-name
'*.tab.[ch]' \
1638 -o
-name
'*.asn1.[ch]' \
1639 -o
-name
'*.symtypes' -o
-name
'modules.order' \
1640 -o
-name modules.builtin
-o
-name
'.tmp_*.o.*' \
1641 -o
-name
'*.c.[012]*.*' \
1643 -o
-name
'*.gcno' \
) -type f
-print | xargs
rm -f
1645 # Generate tags for editors
1646 # ---------------------------------------------------------------------------
1647 quiet_cmd_tags
= GEN
$@
1648 cmd_tags
= $(CONFIG_SHELL
) $(srctree
)/scripts
/tags.sh
$@
1650 tags TAGS cscope gtags
: FORCE
1653 # Scripts to check various things for consistency
1654 # ---------------------------------------------------------------------------
1656 PHONY
+= includecheck versioncheck coccicheck namespacecheck export_report
1659 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1660 -name
'*.[hcS]' -type f
-print |
sort \
1661 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkincludes.pl
1664 find
$(srctree
)/* $(RCS_FIND_IGNORE
) \
1665 -name
'*.[hcS]' -type f
-print |
sort \
1666 | xargs
$(PERL
) -w
$(srctree
)/scripts
/checkversion.pl
1669 $(Q
)$(CONFIG_SHELL
) $(srctree
)/scripts
/$@
1672 $(PERL
) $(srctree
)/scripts
/namespace.pl
1675 $(PERL
) $(srctree
)/scripts
/export_report.pl
1677 PHONY
+= checkstack kernelrelease kernelversion image_name
1679 # UML needs a little special treatment here. It wants to use the host
1680 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1681 # else wants $(ARCH), including people doing cross-builds, which means
1682 # that $(SUBARCH) doesn't work here.
1684 CHECKSTACK_ARCH
:= $(SUBARCH
)
1686 CHECKSTACK_ARCH
:= $(ARCH
)
1689 $(OBJDUMP
) -d vmlinux
$$(find .
-name
'*.ko') | \
1690 $(PERL
) $(src
)/scripts
/checkstack.pl
$(CHECKSTACK_ARCH
)
1693 @echo
"$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1696 @echo
$(KERNELVERSION
)
1699 @echo
$(KBUILD_IMAGE
)
1701 # Clear a bunch of variables before executing the submake
1703 ifeq ($(quiet
),silent_
)
1708 $(Q
)mkdir
-p
$(objtree
)/tools
1709 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(src
)/tools
/
1712 $(Q
)mkdir
-p
$(objtree
)/tools
1713 $(Q
)$(MAKE
) LDFLAGS
= MAKEFLAGS
="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O
=$(abspath
$(objtree
)) subdir
=tools
-C
$(src
)/tools
/ $*
1716 # ---------------------------------------------------------------------------
1717 # Single targets are compatible with:
1718 # - build with mixed source and output
1719 # - build with separate output dir 'make O=...'
1720 # - external modules
1722 # target-dir => where to store outputfile
1723 # build-dir => directory in kernel source tree to use
1725 build-target
= $(if
$(KBUILD_EXTMOD
), $(KBUILD_EXTMOD
)/)$@
1726 build-dir
= $(patsubst %/,%,$(dir $(build-target
)))
1729 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1731 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1732 %.lst
: prepare FORCE
1733 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1735 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1737 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1738 %.symtypes
: prepare FORCE
1739 $(Q
)$(MAKE
) $(build
)=$(build-dir
) $(build-target
)
1741 $(Q
)$(MAKE
) -f
$(srctree
)/scripts
/Makefile.modpost
1747 # Make sure the latest headers are built for Documentation
1748 Documentation
/ samples
/: headers_install
1750 $(Q
)$(MAKE
) KBUILD_MODULES
=1 $(build
)=$(build-dir
)
1752 # FIXME Should go into a make.lib or something
1753 # ===========================================================================
1755 quiet_cmd_rmdirs
= $(if
$(wildcard $(rm-dirs
)),CLEAN
$(wildcard $(rm-dirs
)))
1756 cmd_rmdirs
= rm -rf
$(rm-dirs
)
1758 quiet_cmd_rmfiles
= $(if
$(wildcard $(rm-files
)),CLEAN
$(wildcard $(rm-files
)))
1759 cmd_rmfiles
= rm -f
$(rm-files
)
1761 # Run depmod only if we have System.map and depmod is executable
1762 quiet_cmd_depmod
= DEPMOD
$(KERNELRELEASE
)
1763 cmd_depmod
= $(CONFIG_SHELL
) $(srctree
)/scripts
/depmod.sh
$(DEPMOD
) \
1766 # Create temporary dir for module support files
1767 # clean it up only when building all modules
1768 cmd_crmodverdir
= $(Q
)mkdir
-p
$(MODVERDIR
) \
1769 $(if
$(KBUILD_MODULES
),; rm -f
$(MODVERDIR
)/*)
1771 # read saved command lines for existing targets
1772 existing-targets
:= $(wildcard $(sort $(targets
)))
1774 -include $(foreach f
,$(existing-targets
),$(dir $(f
)).
$(notdir $(f
)).cmd
)
1776 endif # ifeq ($(config-targets),1)
1777 endif # ifeq ($(mixed-targets),1)
1778 endif # need-sub-make
1783 # Declare the contents of the PHONY variable as phony. We keep that
1784 # information in a variable so we can use it in if_changed and friends.