Merge tag 'kvm-s390-next-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux/fpc-iii.git] / Makefile
blobc4322dea3ca2eea7d7b82bd51724397c7358db62
1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 4
3 PATCHLEVEL = 16
4 SUBLEVEL = 0
5 EXTRAVERSION = -rc4
6 NAME = Fearless Coyote
8 # *DOCUMENTATION*
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
15 PHONY := _all
16 _all:
18 # o Do not use make's built-in rules and variables
19 # (this increases performance and avoids hard-to-debug behaviour);
20 # o Look for make include files relative to root of kernel src
21 MAKEFLAGS += -rR --include-dir=$(CURDIR)
23 # Avoid funny character set dependencies
24 unexport LC_ALL
25 LC_COLLATE=C
26 LC_NUMERIC=C
27 export LC_COLLATE LC_NUMERIC
29 # Avoid interference with shell env settings
30 unexport GREP_OPTIONS
32 # We are using a recursive build, so we need to do a little thinking
33 # to get the ordering right.
35 # Most importantly: sub-Makefiles should only ever modify files in
36 # their own directory. If in some directory we have a dependency on
37 # a file in another dir (which doesn't happen often, but it's often
38 # unavoidable when linking the built-in.o targets which finally
39 # turn into vmlinux), we will call a sub make in that other dir, and
40 # after that we are sure that everything which is in that other dir
41 # is now up to date.
43 # The only cases where we need to modify files which have global
44 # effects are thus separated out and done before the recursive
45 # descending is started. They are now explicitly listed as the
46 # prepare rule.
48 # Beautify output
49 # ---------------------------------------------------------------------------
51 # Normally, we echo the whole command before executing it. By making
52 # that echo $($(quiet)$(cmd)), we now have the possibility to set
53 # $(quiet) to choose other forms of output instead, e.g.
55 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
56 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
58 # If $(quiet) is empty, the whole command will be printed.
59 # If it is set to "quiet_", only the short version will be printed.
60 # If it is set to "silent_", nothing will be printed at all, since
61 # the variable $(silent_cmd_cc_o_c) doesn't exist.
63 # A simple variant is to prefix commands with $(Q) - that's useful
64 # for commands that shall be hidden in non-verbose mode.
66 # $(Q)ln $@ :<
68 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
69 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
71 # To put more focus on warnings, be less verbose as default
72 # Use 'make V=1' to see the full commands
74 ifeq ("$(origin V)", "command line")
75 KBUILD_VERBOSE = $(V)
76 endif
77 ifndef KBUILD_VERBOSE
78 KBUILD_VERBOSE = 0
79 endif
81 ifeq ($(KBUILD_VERBOSE),1)
82 quiet =
83 Q =
84 else
85 quiet=quiet_
86 Q = @
87 endif
89 # If the user is running make -s (silent mode), suppress echoing of
90 # commands
92 ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
93 quiet=silent_
94 tools_silent=s
95 endif
97 export quiet Q KBUILD_VERBOSE
99 # kbuild supports saving output files in a separate directory.
100 # To locate output files in a separate directory two syntaxes are supported.
101 # In both cases the working directory must be the root of the kernel src.
102 # 1) O=
103 # Use "make O=dir/to/store/output/files/"
105 # 2) Set KBUILD_OUTPUT
106 # Set the environment variable KBUILD_OUTPUT to point to the directory
107 # where the output files shall be placed.
108 # export KBUILD_OUTPUT=dir/to/store/output/files/
109 # make
111 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
112 # variable.
114 # KBUILD_SRC is not intended to be used by the regular user (for now),
115 # it is set on invocation of make with KBUILD_OUTPUT or O= specified.
116 ifeq ($(KBUILD_SRC),)
118 # OK, Make called in directory where kernel src resides
119 # Do we want to locate output files in a separate directory?
120 ifeq ("$(origin O)", "command line")
121 KBUILD_OUTPUT := $(O)
122 endif
124 # Cancel implicit rules on top Makefile
125 $(CURDIR)/Makefile Makefile: ;
127 ifneq ($(words $(subst :, ,$(CURDIR))), 1)
128 $(error main directory cannot contain spaces nor colons)
129 endif
131 ifneq ($(KBUILD_OUTPUT),)
132 # check that the output directory actually exists
133 saved-output := $(KBUILD_OUTPUT)
134 KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
135 && pwd)
136 $(if $(KBUILD_OUTPUT),, \
137 $(error failed to create output directory "$(saved-output)"))
139 PHONY += $(MAKECMDGOALS) sub-make
141 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
144 # Invoke a second make in the output directory, passing relevant variables
145 sub-make:
146 $(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
147 -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
149 # Leave processing to above invocation of make
150 skip-makefile := 1
151 endif # ifneq ($(KBUILD_OUTPUT),)
152 endif # ifeq ($(KBUILD_SRC),)
154 # We process the rest of the Makefile if this is the final invocation of make
155 ifeq ($(skip-makefile),)
157 # Do not print "Entering directory ...",
158 # but we want to display it when entering to the output directory
159 # so that IDEs/editors are able to understand relative filenames.
160 MAKEFLAGS += --no-print-directory
162 # Call a source code checker (by default, "sparse") as part of the
163 # C compilation.
165 # Use 'make C=1' to enable checking of only re-compiled files.
166 # Use 'make C=2' to enable checking of *all* source files, regardless
167 # of whether they are re-compiled or not.
169 # See the file "Documentation/dev-tools/sparse.rst" for more details,
170 # including where to get the "sparse" utility.
172 ifeq ("$(origin C)", "command line")
173 KBUILD_CHECKSRC = $(C)
174 endif
175 ifndef KBUILD_CHECKSRC
176 KBUILD_CHECKSRC = 0
177 endif
179 # Use make M=dir to specify directory of external module to build
180 # Old syntax make ... SUBDIRS=$PWD is still supported
181 # Setting the environment variable KBUILD_EXTMOD take precedence
182 ifdef SUBDIRS
183 KBUILD_EXTMOD ?= $(SUBDIRS)
184 endif
186 ifeq ("$(origin M)", "command line")
187 KBUILD_EXTMOD := $(M)
188 endif
190 ifeq ($(KBUILD_SRC),)
191 # building in the source tree
192 srctree := .
193 else
194 ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR)))
195 # building in a subdirectory of the source tree
196 srctree := ..
197 else
198 srctree := $(KBUILD_SRC)
199 endif
200 endif
202 export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC
204 objtree := .
205 src := $(srctree)
206 obj := $(objtree)
208 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
210 export srctree objtree VPATH
212 # To make sure we do not include .config for any of the *config targets
213 # catch them early, and hand them over to scripts/kconfig/Makefile
214 # It is allowed to specify more targets when calling make, including
215 # mixing *config targets and build targets.
216 # For example 'make oldconfig all'.
217 # Detect when mixed targets is specified, and make a second invocation
218 # of make so .config is not included in this case either (for *config).
220 version_h := include/generated/uapi/linux/version.h
221 old_version_h := include/linux/version.h
223 no-dot-config-targets := clean mrproper distclean \
224 cscope gtags TAGS tags help% %docs check% coccicheck \
225 $(version_h) headers_% archheaders archscripts \
226 kernelversion %src-pkg
228 config-targets := 0
229 mixed-targets := 0
230 dot-config := 1
232 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
233 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
234 dot-config := 0
235 endif
236 endif
238 ifeq ($(KBUILD_EXTMOD),)
239 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
240 config-targets := 1
241 ifneq ($(words $(MAKECMDGOALS)),1)
242 mixed-targets := 1
243 endif
244 endif
245 endif
246 # install and modules_install need also be processed one by one
247 ifneq ($(filter install,$(MAKECMDGOALS)),)
248 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
249 mixed-targets := 1
250 endif
251 endif
253 ifeq ($(mixed-targets),1)
254 # ===========================================================================
255 # We're called with mixed targets (*config and build targets).
256 # Handle them one by one.
258 PHONY += $(MAKECMDGOALS) __build_one_by_one
260 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
263 __build_one_by_one:
264 $(Q)set -e; \
265 for i in $(MAKECMDGOALS); do \
266 $(MAKE) -f $(srctree)/Makefile $$i; \
267 done
269 else
271 # We need some generic definitions (do not try to remake the file).
272 scripts/Kbuild.include: ;
273 include scripts/Kbuild.include
275 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
276 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
277 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
278 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
280 # SUBARCH tells the usermode build what the underlying arch is. That is set
281 # first, and if a usermode build is happening, the "ARCH=um" on the command
282 # line overrides the setting of ARCH below. If a native build is happening,
283 # then ARCH is assigned, getting whatever value it gets normally, and
284 # SUBARCH is subsequently ignored.
286 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
287 -e s/sun4u/sparc64/ \
288 -e s/arm.*/arm/ -e s/sa110/arm/ \
289 -e s/s390x/s390/ -e s/parisc64/parisc/ \
290 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
291 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
292 -e s/riscv.*/riscv/)
294 # Cross compiling and selecting different set of gcc/bin-utils
295 # ---------------------------------------------------------------------------
297 # When performing cross compilation for other architectures ARCH shall be set
298 # to the target architecture. (See arch/* for the possibilities).
299 # ARCH can be set during invocation of make:
300 # make ARCH=ia64
301 # Another way is to have ARCH set in the environment.
302 # The default ARCH is the host where make is executed.
304 # CROSS_COMPILE specify the prefix used for all executables used
305 # during compilation. Only gcc and related bin-utils executables
306 # are prefixed with $(CROSS_COMPILE).
307 # CROSS_COMPILE can be set on the command line
308 # make CROSS_COMPILE=ia64-linux-
309 # Alternatively CROSS_COMPILE can be set in the environment.
310 # A third alternative is to store a setting in .config so that plain
311 # "make" in the configured kernel build directory always uses that.
312 # Default value for CROSS_COMPILE is not to prefix executables
313 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
314 ARCH ?= $(SUBARCH)
315 CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
317 # Architecture as present in compile.h
318 UTS_MACHINE := $(ARCH)
319 SRCARCH := $(ARCH)
321 # Additional ARCH settings for x86
322 ifeq ($(ARCH),i386)
323 SRCARCH := x86
324 endif
325 ifeq ($(ARCH),x86_64)
326 SRCARCH := x86
327 endif
329 # Additional ARCH settings for sparc
330 ifeq ($(ARCH),sparc32)
331 SRCARCH := sparc
332 endif
333 ifeq ($(ARCH),sparc64)
334 SRCARCH := sparc
335 endif
337 # Additional ARCH settings for sh
338 ifeq ($(ARCH),sh64)
339 SRCARCH := sh
340 endif
342 # Additional ARCH settings for tile
343 ifeq ($(ARCH),tilepro)
344 SRCARCH := tile
345 endif
346 ifeq ($(ARCH),tilegx)
347 SRCARCH := tile
348 endif
350 KCONFIG_CONFIG ?= .config
351 export KCONFIG_CONFIG
353 # SHELL used by kbuild
354 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
355 else if [ -x /bin/bash ]; then echo /bin/bash; \
356 else echo sh; fi ; fi)
358 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS)
359 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS)
360 HOST_LFS_LIBS := $(shell getconf LFS_LIBS)
362 HOSTCC = gcc
363 HOSTCXX = g++
364 HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
365 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
366 HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
367 HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
368 HOST_LOADLIBES := $(HOST_LFS_LIBS)
370 # Make variables (CC, etc...)
371 AS = $(CROSS_COMPILE)as
372 LD = $(CROSS_COMPILE)ld
373 CC = $(CROSS_COMPILE)gcc
374 CPP = $(CC) -E
375 AR = $(CROSS_COMPILE)ar
376 NM = $(CROSS_COMPILE)nm
377 STRIP = $(CROSS_COMPILE)strip
378 OBJCOPY = $(CROSS_COMPILE)objcopy
379 OBJDUMP = $(CROSS_COMPILE)objdump
380 LEX = flex
381 YACC = bison
382 AWK = awk
383 GENKSYMS = scripts/genksyms/genksyms
384 INSTALLKERNEL := installkernel
385 DEPMOD = /sbin/depmod
386 PERL = perl
387 PYTHON = python
388 CHECK = sparse
390 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
391 -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
392 NOSTDINC_FLAGS =
393 CFLAGS_MODULE =
394 AFLAGS_MODULE =
395 LDFLAGS_MODULE =
396 CFLAGS_KERNEL =
397 AFLAGS_KERNEL =
398 LDFLAGS_vmlinux =
400 # Use USERINCLUDE when you must reference the UAPI directories only.
401 USERINCLUDE := \
402 -I$(srctree)/arch/$(SRCARCH)/include/uapi \
403 -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
404 -I$(srctree)/include/uapi \
405 -I$(objtree)/include/generated/uapi \
406 -include $(srctree)/include/linux/kconfig.h
408 # Use LINUXINCLUDE when you must reference the include/ directory.
409 # Needed to be compatible with the O= option
410 LINUXINCLUDE := \
411 -I$(srctree)/arch/$(SRCARCH)/include \
412 -I$(objtree)/arch/$(SRCARCH)/include/generated \
413 $(if $(KBUILD_SRC), -I$(srctree)/include) \
414 -I$(objtree)/include \
415 $(USERINCLUDE)
417 KBUILD_AFLAGS := -D__ASSEMBLY__
418 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
419 -fno-strict-aliasing -fno-common -fshort-wchar \
420 -Werror-implicit-function-declaration \
421 -Wno-format-security \
422 -std=gnu89
423 KBUILD_CPPFLAGS := -D__KERNEL__
424 KBUILD_AFLAGS_KERNEL :=
425 KBUILD_CFLAGS_KERNEL :=
426 KBUILD_AFLAGS_MODULE := -DMODULE
427 KBUILD_CFLAGS_MODULE := -DMODULE
428 KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
429 GCC_PLUGINS_CFLAGS :=
431 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
432 export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
433 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
434 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
436 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
437 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
438 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
439 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
440 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
441 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
442 export KBUILD_ARFLAGS
444 # When compiling out-of-tree modules, put MODVERDIR in the module
445 # tree rather than in the kernel tree. The kernel tree might
446 # even be read-only.
447 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
449 # Files to ignore in find ... statements
451 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
452 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
453 -prune -o
454 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
455 --exclude CVS --exclude .pc --exclude .hg --exclude .git
457 # ===========================================================================
458 # Rules shared between *config targets and build targets
460 # Basic helpers built in scripts/basic/
461 PHONY += scripts_basic
462 scripts_basic:
463 $(Q)$(MAKE) $(build)=scripts/basic
464 $(Q)rm -f .tmp_quiet_recordmcount
466 # To avoid any implicit rule to kick in, define an empty command.
467 scripts/basic/%: scripts_basic ;
469 PHONY += outputmakefile
470 # outputmakefile generates a Makefile in the output directory, if using a
471 # separate output directory. This allows convenient use of make in the
472 # output directory.
473 outputmakefile:
474 ifneq ($(KBUILD_SRC),)
475 $(Q)ln -fsn $(srctree) source
476 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
477 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
478 endif
480 ifeq ($(cc-name),clang)
481 ifneq ($(CROSS_COMPILE),)
482 CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
483 GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
484 endif
485 ifneq ($(GCC_TOOLCHAIN),)
486 CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
487 endif
488 KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
489 KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
490 endif
492 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
493 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
494 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
495 export RETPOLINE_CFLAGS
497 ifeq ($(config-targets),1)
498 # ===========================================================================
499 # *config targets only - make sure prerequisites are updated, and descend
500 # in scripts/kconfig to make the *config target
502 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
503 # KBUILD_DEFCONFIG may point out an alternative default configuration
504 # used for 'make defconfig'
505 include arch/$(SRCARCH)/Makefile
506 export KBUILD_DEFCONFIG KBUILD_KCONFIG
508 config: scripts_basic outputmakefile FORCE
509 $(Q)$(MAKE) $(build)=scripts/kconfig $@
511 %config: scripts_basic outputmakefile FORCE
512 $(Q)$(MAKE) $(build)=scripts/kconfig $@
514 else
515 # ===========================================================================
516 # Build targets only - this includes vmlinux, arch specific targets, clean
517 # targets and others. In general all targets except *config targets.
519 # If building an external module we do not care about the all: rule
520 # but instead _all depend on modules
521 PHONY += all
522 ifeq ($(KBUILD_EXTMOD),)
523 _all: all
524 else
525 _all: modules
526 endif
528 # Decide whether to build built-in, modular, or both.
529 # Normally, just do built-in.
531 KBUILD_MODULES :=
532 KBUILD_BUILTIN := 1
534 # If we have only "make modules", don't compile built-in objects.
535 # When we're building modules with modversions, we need to consider
536 # the built-in objects during the descend as well, in order to
537 # make sure the checksums are up to date before we record them.
539 ifeq ($(MAKECMDGOALS),modules)
540 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
541 endif
543 # If we have "make <whatever> modules", compile modules
544 # in addition to whatever we do anyway.
545 # Just "make" or "make all" shall build modules as well
547 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
548 KBUILD_MODULES := 1
549 endif
551 ifeq ($(MAKECMDGOALS),)
552 KBUILD_MODULES := 1
553 endif
555 export KBUILD_MODULES KBUILD_BUILTIN
557 ifeq ($(KBUILD_EXTMOD),)
558 # Additional helpers built in scripts/
559 # Carefully list dependencies so we do not try to build scripts twice
560 # in parallel
561 PHONY += scripts
562 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
563 asm-generic gcc-plugins
564 $(Q)$(MAKE) $(build)=$(@)
566 # Objects we will link into vmlinux / subdirs we need to visit
567 init-y := init/
568 drivers-y := drivers/ sound/ firmware/
569 net-y := net/
570 libs-y := lib/
571 core-y := usr/
572 virt-y := virt/
573 endif # KBUILD_EXTMOD
575 ifeq ($(dot-config),1)
576 # Read in config
577 -include include/config/auto.conf
579 ifeq ($(KBUILD_EXTMOD),)
580 # Read in dependencies to all Kconfig* files, make sure to run
581 # oldconfig if changes are detected.
582 -include include/config/auto.conf.cmd
584 # To avoid any implicit rule to kick in, define an empty command
585 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
587 # The actual configuration files used during the build are stored in
588 # include/generated/ and include/config/. Update them if .config is newer than
589 # include/config/auto.conf (which mirrors .config).
590 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
591 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
592 else
593 # external modules needs include/generated/autoconf.h and include/config/auto.conf
594 # but do not care if they are up-to-date. Use auto.conf to trigger the test
595 PHONY += include/config/auto.conf
597 include/config/auto.conf:
598 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
599 echo >&2; \
600 echo >&2 " ERROR: Kernel configuration is invalid."; \
601 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
602 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
603 echo >&2 ; \
604 /bin/false)
606 endif # KBUILD_EXTMOD
608 else
609 # Dummy target needed, because used as prerequisite
610 include/config/auto.conf: ;
611 endif # $(dot-config)
613 # For the kernel to actually contain only the needed exported symbols,
614 # we have to build modules as well to determine what those symbols are.
615 # (this can be evaluated only once include/config/auto.conf has been included)
616 ifdef CONFIG_TRIM_UNUSED_KSYMS
617 KBUILD_MODULES := 1
618 endif
620 # The all: target is the default when no target is given on the
621 # command line.
622 # This allow a user to issue only 'make' to build a kernel including modules
623 # Defaults to vmlinux, but the arch makefile usually adds further targets
624 all: vmlinux
626 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
627 KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
628 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage -fno-tree-loop-im $(call cc-disable-warning,maybe-uninitialized,)
629 export CFLAGS_GCOV CFLAGS_KCOV
631 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
632 # values of the respective KBUILD_* variables
633 ARCH_CPPFLAGS :=
634 ARCH_AFLAGS :=
635 ARCH_CFLAGS :=
636 include arch/$(SRCARCH)/Makefile
638 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
639 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
640 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
641 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
642 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
644 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
645 KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
646 KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
647 else
648 ifdef CONFIG_PROFILE_ALL_BRANCHES
649 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
650 else
651 KBUILD_CFLAGS += -O2
652 endif
653 endif
655 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
656 $(call cc-disable-warning,maybe-uninitialized,))
658 # Tell gcc to never replace conditional load with a non-conditional one
659 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
661 # check for 'asm goto'
662 ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
663 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
664 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
665 endif
667 include scripts/Makefile.kcov
668 include scripts/Makefile.gcc-plugins
670 ifdef CONFIG_READABLE_ASM
671 # Disable optimizations that make assembler listings hard to read.
672 # reorder blocks reorders the control in the function
673 # ipa clone creates specialized cloned functions
674 # partial inlining inlines only parts of functions
675 KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \
676 $(call cc-option,-fno-ipa-cp-clone,) \
677 $(call cc-option,-fno-partial-inlining)
678 endif
680 ifneq ($(CONFIG_FRAME_WARN),0)
681 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
682 endif
684 # This selects the stack protector compiler flag. Testing it is delayed
685 # until after .config has been reprocessed, in the prepare-compiler-check
686 # target.
687 ifdef CONFIG_CC_STACKPROTECTOR_AUTO
688 stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
689 stackp-name := AUTO
690 else
691 ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
692 stackp-flag := -fstack-protector
693 stackp-name := REGULAR
694 else
695 ifdef CONFIG_CC_STACKPROTECTOR_STRONG
696 stackp-flag := -fstack-protector-strong
697 stackp-name := STRONG
698 else
699 # If either there is no stack protector for this architecture or
700 # CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
701 # is empty, skipping all remaining stack protector tests.
703 # Force off for distro compilers that enable stack protector by default.
704 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
705 endif
706 endif
707 endif
708 # Find arch-specific stack protector compiler sanity-checking script.
709 ifdef stackp-name
710 ifneq ($(stackp-flag),)
711 stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
712 stackp-check := $(wildcard $(stackp-path))
713 # If the wildcard test matches a test script, run it to check functionality.
714 ifdef stackp-check
715 ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
716 stackp-broken := y
717 endif
718 endif
719 ifndef stackp-broken
720 # If the stack protector is functional, enable code that depends on it.
721 KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
722 # Either we've already detected the flag (for AUTO) or we'll fail the
723 # build in the prepare-compiler-check rule (for specific flag).
724 KBUILD_CFLAGS += $(stackp-flag)
725 else
726 # We have to make sure stack protector is unconditionally disabled if
727 # the compiler is broken (in case we're going to continue the build in
728 # AUTO mode).
729 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
730 endif
731 endif
732 endif
734 ifeq ($(cc-name),clang)
735 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
736 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
737 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
738 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
739 # Quiet clang warning: comparison of unsigned expression < 0 is always false
740 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
741 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
742 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
743 # See modpost pattern 2
744 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
745 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
746 KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
747 KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
748 else
750 # These warnings generated too much noise in a regular build.
751 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
752 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
753 endif
755 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
756 ifdef CONFIG_FRAME_POINTER
757 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
758 else
759 # Some targets (ARM with Thumb2, for example), can't be built with frame
760 # pointers. For those, we don't have FUNCTION_TRACER automatically
761 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
762 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
763 # -fomit-frame-pointer with FUNCTION_TRACER.
764 ifndef CONFIG_FUNCTION_TRACER
765 KBUILD_CFLAGS += -fomit-frame-pointer
766 endif
767 endif
769 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
771 ifdef CONFIG_DEBUG_INFO
772 ifdef CONFIG_DEBUG_INFO_SPLIT
773 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
774 else
775 KBUILD_CFLAGS += -g
776 endif
777 KBUILD_AFLAGS += -Wa,-gdwarf-2
778 endif
779 ifdef CONFIG_DEBUG_INFO_DWARF4
780 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
781 endif
783 ifdef CONFIG_DEBUG_INFO_REDUCED
784 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
785 $(call cc-option,-fno-var-tracking)
786 endif
788 ifdef CONFIG_FUNCTION_TRACER
789 ifndef CC_FLAGS_FTRACE
790 CC_FLAGS_FTRACE := -pg
791 endif
792 export CC_FLAGS_FTRACE
793 ifdef CONFIG_HAVE_FENTRY
794 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
795 endif
796 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
797 KBUILD_AFLAGS += $(CC_USING_FENTRY)
798 ifdef CONFIG_DYNAMIC_FTRACE
799 ifdef CONFIG_HAVE_C_RECORDMCOUNT
800 BUILD_C_RECORDMCOUNT := y
801 export BUILD_C_RECORDMCOUNT
802 endif
803 endif
804 endif
806 # We trigger additional mismatches with less inlining
807 ifdef CONFIG_DEBUG_SECTION_MISMATCH
808 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
809 endif
811 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
812 KBUILD_CFLAGS += $(call cc-option,-ffunction-sections,)
813 KBUILD_CFLAGS += $(call cc-option,-fdata-sections,)
814 endif
816 # arch Makefile may override CC so keep this after arch Makefile is included
817 NOSTDINC_FLAGS += -nostdinc -isystem $(call shell-cached,$(CC) -print-file-name=include)
818 CHECKFLAGS += $(NOSTDINC_FLAGS)
820 # warn about C99 declaration after statement
821 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
823 # disable pointer signed / unsigned warnings in gcc 4.0
824 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
826 # disable invalid "can't wrap" optimizations for signed / pointers
827 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
829 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
830 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
832 # conserve stack if available
833 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
835 # disallow errors like 'EXPORT_GPL(foo);' with missing header
836 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
838 # require functions to have arguments in prototypes, not empty 'int foo()'
839 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
841 # Prohibit date/time macros, which would make the build non-deterministic
842 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
844 # enforce correct pointer usage
845 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
847 # Require designated initializers for all marked structures
848 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
850 # use the deterministic mode of AR if available
851 KBUILD_ARFLAGS := $(call ar-option,D)
853 include scripts/Makefile.kasan
854 include scripts/Makefile.extrawarn
855 include scripts/Makefile.ubsan
857 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
858 # last assignments
859 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
860 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
861 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
863 # Use --build-id when available.
864 LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
865 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
866 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
868 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
869 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
870 endif
872 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
873 LDFLAGS_vmlinux += $(call ld-option, -X,)
874 endif
876 # Default kernel image to build when no specific target is given.
877 # KBUILD_IMAGE may be overruled on the command line or
878 # set in the environment
879 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
880 # this default value
881 export KBUILD_IMAGE ?= vmlinux
884 # INSTALL_PATH specifies where to place the updated kernel and system map
885 # images. Default is /boot, but you can set it to other values
886 export INSTALL_PATH ?= /boot
889 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
890 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
891 # an argument if needed. Otherwise it defaults to the kernel install path
893 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
896 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
897 # relocations required by build roots. This is not defined in the
898 # makefile but the argument can be passed to make if needed.
901 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
902 export MODLIB
905 # INSTALL_MOD_STRIP, if defined, will cause modules to be
906 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
907 # the default option --strip-debug will be used. Otherwise,
908 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
910 ifdef INSTALL_MOD_STRIP
911 ifeq ($(INSTALL_MOD_STRIP),1)
912 mod_strip_cmd = $(STRIP) --strip-debug
913 else
914 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
915 endif # INSTALL_MOD_STRIP=1
916 else
917 mod_strip_cmd = true
918 endif # INSTALL_MOD_STRIP
919 export mod_strip_cmd
921 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
922 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
923 # or CONFIG_MODULE_COMPRESS_XZ.
925 mod_compress_cmd = true
926 ifdef CONFIG_MODULE_COMPRESS
927 ifdef CONFIG_MODULE_COMPRESS_GZIP
928 mod_compress_cmd = gzip -n -f
929 endif # CONFIG_MODULE_COMPRESS_GZIP
930 ifdef CONFIG_MODULE_COMPRESS_XZ
931 mod_compress_cmd = xz -f
932 endif # CONFIG_MODULE_COMPRESS_XZ
933 endif # CONFIG_MODULE_COMPRESS
934 export mod_compress_cmd
936 # Select initial ramdisk compression format, default is gzip(1).
937 # This shall be used by the dracut(8) tool while creating an initramfs image.
939 INITRD_COMPRESS-y := gzip
940 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
941 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
942 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
943 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
944 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
945 # do not export INITRD_COMPRESS, since we didn't actually
946 # choose a sane default compression above.
947 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
949 ifdef CONFIG_MODULE_SIG_ALL
950 $(eval $(call config_filename,MODULE_SIG_KEY))
952 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
953 else
954 mod_sign_cmd = true
955 endif
956 export mod_sign_cmd
958 ifdef CONFIG_STACK_VALIDATION
959 has_libelf := $(call try-run,\
960 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
961 ifeq ($(has_libelf),1)
962 objtool_target := tools/objtool FORCE
963 else
964 ifdef CONFIG_UNWINDER_ORC
965 $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
966 else
967 $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
968 endif
969 SKIP_STACK_VALIDATION := 1
970 export SKIP_STACK_VALIDATION
971 endif
972 endif
975 ifeq ($(KBUILD_EXTMOD),)
976 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
978 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
979 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
980 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
982 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
983 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
985 init-y := $(patsubst %/, %/built-in.o, $(init-y))
986 core-y := $(patsubst %/, %/built-in.o, $(core-y))
987 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
988 net-y := $(patsubst %/, %/built-in.o, $(net-y))
989 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
990 libs-y2 := $(filter-out %.a, $(patsubst %/, %/built-in.o, $(libs-y)))
991 virt-y := $(patsubst %/, %/built-in.o, $(virt-y))
993 # Externally visible symbols (used by link-vmlinux.sh)
994 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
995 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
996 export KBUILD_VMLINUX_LIBS := $(libs-y1)
997 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
998 export LDFLAGS_vmlinux
999 # used by scripts/package/Makefile
1000 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
1002 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
1004 # Include targets which we want to execute sequentially if the rest of the
1005 # kernel build went well. If CONFIG_TRIM_UNUSED_KSYMS is set, this might be
1006 # evaluated more than once.
1007 PHONY += vmlinux_prereq
1008 vmlinux_prereq: $(vmlinux-deps) FORCE
1009 ifdef CONFIG_HEADERS_CHECK
1010 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
1011 endif
1012 ifdef CONFIG_GDB_SCRIPTS
1013 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1014 endif
1015 ifdef CONFIG_TRIM_UNUSED_KSYMS
1016 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
1017 "$(MAKE) -f $(srctree)/Makefile vmlinux"
1018 endif
1020 # standalone target for easier testing
1021 include/generated/autoksyms.h: FORCE
1022 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh true
1024 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
1026 # Final link of vmlinux with optional arch pass after final link
1027 cmd_link-vmlinux = \
1028 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
1029 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1031 vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
1032 +$(call if_changed,link-vmlinux)
1034 # Build samples along the rest of the kernel
1035 ifdef CONFIG_SAMPLES
1036 vmlinux-dirs += samples
1037 endif
1039 # The actual objects are generated when descending,
1040 # make sure no implicit rule kicks in
1041 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1043 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1044 # Preset locale variables to speed up the build process. Limit locale
1045 # tweaks to this spot to avoid wrong language settings when running
1046 # make menuconfig etc.
1047 # Error messages still appears in the original language
1049 PHONY += $(vmlinux-dirs)
1050 $(vmlinux-dirs): prepare scripts
1051 $(Q)$(MAKE) $(build)=$@ need-builtin=1
1053 define filechk_kernel.release
1054 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1055 endef
1057 # Store (new) KERNELRELEASE string in include/config/kernel.release
1058 include/config/kernel.release: include/config/auto.conf FORCE
1059 $(call filechk,kernel.release)
1062 # Things we need to do before we recursively start building the kernel
1063 # or the modules are listed in "prepare".
1064 # A multi level approach is used. prepareN is processed before prepareN-1.
1065 # archprepare is used in arch Makefiles and when processed asm symlink,
1066 # version.h and scripts_basic is processed / created.
1068 # Listed in dependency order
1069 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1071 # prepare3 is used to check if we are building in a separate output directory,
1072 # and if so do:
1073 # 1) Check that make has not been executed in the kernel src $(srctree)
1074 prepare3: include/config/kernel.release
1075 ifneq ($(KBUILD_SRC),)
1076 @$(kecho) ' Using $(srctree) as source for kernel'
1077 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1078 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1079 echo >&2 " in the '$(srctree)' directory.";\
1080 /bin/false; \
1082 endif
1084 # prepare2 creates a makefile if using a separate output directory.
1085 # From this point forward, .config has been reprocessed, so any rules
1086 # that need to depend on updated CONFIG_* values can be checked here.
1087 prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
1089 prepare1: prepare2 $(version_h) include/generated/utsrelease.h \
1090 include/config/auto.conf
1091 $(cmd_crmodverdir)
1093 archprepare: archheaders archscripts prepare1 scripts_basic
1095 prepare0: archprepare gcc-plugins
1096 $(Q)$(MAKE) $(build)=.
1098 # All the preparing..
1099 prepare: prepare0 prepare-objtool
1101 # Support for using generic headers in asm-generic
1102 PHONY += asm-generic uapi-asm-generic
1103 asm-generic: uapi-asm-generic
1104 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1105 src=asm obj=arch/$(SRCARCH)/include/generated/asm
1106 uapi-asm-generic:
1107 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1108 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
1110 PHONY += prepare-objtool
1111 prepare-objtool: $(objtool_target)
1113 # Check for CONFIG flags that require compiler support. Abort the build
1114 # after .config has been processed, but before the kernel build starts.
1116 # For security-sensitive CONFIG options, we don't want to fallback and/or
1117 # silently change which compiler flags will be used, since that leads to
1118 # producing kernels with different security feature characteristics
1119 # depending on the compiler used. (For example, "But I selected
1120 # CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
1121 PHONY += prepare-compiler-check
1122 prepare-compiler-check: FORCE
1123 # Make sure compiler supports requested stack protector flag.
1124 ifdef stackp-name
1125 # Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
1126 ifeq ($(stackp-flag),)
1127 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1128 Compiler does not support any known stack-protector >&2
1129 else
1130 # Fail if specifically requested stack protector is missing.
1131 ifeq ($(call cc-option, $(stackp-flag)),)
1132 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1133 $(stackp-flag) not supported by compiler >&2 && exit 1
1134 endif
1135 endif
1136 endif
1137 # Make sure compiler does not have buggy stack-protector support. If a
1138 # specific stack-protector was requested, fail the build, otherwise warn.
1139 ifdef stackp-broken
1140 ifeq ($(stackp-name),AUTO)
1141 @echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1142 $(stackp-flag) available but compiler is broken: disabling >&2
1143 else
1144 @echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
1145 $(stackp-flag) available but compiler is broken >&2 && exit 1
1146 endif
1147 endif
1150 # Generate some files
1151 # ---------------------------------------------------------------------------
1153 # KERNELRELEASE can change from a few different places, meaning version.h
1154 # needs to be updated, so this check is forced on all builds
1156 uts_len := 64
1157 define filechk_utsrelease.h
1158 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1159 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1160 exit 1; \
1161 fi; \
1162 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1163 endef
1165 define filechk_version.h
1166 (echo \#define LINUX_VERSION_CODE $(shell \
1167 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1168 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1169 endef
1171 $(version_h): $(srctree)/Makefile FORCE
1172 $(call filechk,version.h)
1173 $(Q)rm -f $(old_version_h)
1175 include/generated/utsrelease.h: include/config/kernel.release FORCE
1176 $(call filechk,utsrelease.h)
1178 PHONY += headerdep
1179 headerdep:
1180 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1181 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1183 # ---------------------------------------------------------------------------
1184 # Kernel headers
1186 #Default location for installed headers
1187 export INSTALL_HDR_PATH = $(objtree)/usr
1189 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1190 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
1192 PHONY += archheaders
1193 archheaders:
1195 PHONY += archscripts
1196 archscripts:
1198 PHONY += __headers
1199 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
1200 $(Q)$(MAKE) $(build)=scripts build_unifdef
1202 PHONY += headers_install_all
1203 headers_install_all:
1204 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1206 PHONY += headers_install
1207 headers_install: __headers
1208 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1209 $(error Headers not exportable for the $(SRCARCH) architecture))
1210 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
1211 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
1213 PHONY += headers_check_all
1214 headers_check_all: headers_install_all
1215 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1217 PHONY += headers_check
1218 headers_check: headers_install
1219 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
1220 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
1222 # ---------------------------------------------------------------------------
1223 # Kernel selftest
1225 PHONY += kselftest
1226 kselftest:
1227 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1229 PHONY += kselftest-clean
1230 kselftest-clean:
1231 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1233 PHONY += kselftest-merge
1234 kselftest-merge:
1235 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1236 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1237 -m $(objtree)/.config \
1238 $(srctree)/tools/testing/selftests/*/config
1239 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1241 # ---------------------------------------------------------------------------
1242 # Modules
1244 ifdef CONFIG_MODULES
1246 # By default, build modules as well
1248 all: modules
1250 # Build modules
1252 # A module can be listed more than once in obj-m resulting in
1253 # duplicate lines in modules.order files. Those are removed
1254 # using awk while concatenating to the final file.
1256 PHONY += modules
1257 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1258 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1259 @$(kecho) ' Building modules, stage 2.';
1260 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1262 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1263 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1265 %/modules.builtin: include/config/auto.conf
1266 $(Q)$(MAKE) $(modbuiltin)=$*
1269 # Target to prepare building external modules
1270 PHONY += modules_prepare
1271 modules_prepare: prepare scripts
1273 # Target to install modules
1274 PHONY += modules_install
1275 modules_install: _modinst_ _modinst_post
1277 PHONY += _modinst_
1278 _modinst_:
1279 @rm -rf $(MODLIB)/kernel
1280 @rm -f $(MODLIB)/source
1281 @mkdir -p $(MODLIB)/kernel
1282 @ln -s $(abspath $(srctree)) $(MODLIB)/source
1283 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1284 rm -f $(MODLIB)/build ; \
1285 ln -s $(CURDIR) $(MODLIB)/build ; \
1287 @cp -f $(objtree)/modules.order $(MODLIB)/
1288 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1289 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1291 # This depmod is only for convenience to give the initial
1292 # boot a modules.dep even before / is mounted read-write. However the
1293 # boot script depmod is the master version.
1294 PHONY += _modinst_post
1295 _modinst_post: _modinst_
1296 $(call cmd,depmod)
1298 ifeq ($(CONFIG_MODULE_SIG), y)
1299 PHONY += modules_sign
1300 modules_sign:
1301 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1302 endif
1304 else # CONFIG_MODULES
1306 # Modules not configured
1307 # ---------------------------------------------------------------------------
1309 PHONY += modules modules_install
1310 modules modules_install:
1311 @echo >&2
1312 @echo >&2 "The present kernel configuration has modules disabled."
1313 @echo >&2 "Type 'make config' and enable loadable module support."
1314 @echo >&2 "Then build a kernel with module support enabled."
1315 @echo >&2
1316 @exit 1
1318 endif # CONFIG_MODULES
1321 # Cleaning is done on three levels.
1322 # make clean Delete most generated files
1323 # Leave enough to build external modules
1324 # make mrproper Delete the current configuration, and all generated files
1325 # make distclean Remove editor backup files, patch leftover files and the like
1327 # Directories & files removed with 'make clean'
1328 CLEAN_DIRS += $(MODVERDIR)
1330 # Directories & files removed with 'make mrproper'
1331 MRPROPER_DIRS += include/config usr/include include/generated \
1332 arch/*/include/generated .tmp_objdiff
1333 MRPROPER_FILES += .config .config.old .version \
1334 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1335 signing_key.pem signing_key.priv signing_key.x509 \
1336 x509.genkey extra_certificates signing_key.x509.keyid \
1337 signing_key.x509.signer vmlinux-gdb.py
1339 # clean - Delete most, but leave enough to build external modules
1341 clean: rm-dirs := $(CLEAN_DIRS)
1342 clean: rm-files := $(CLEAN_FILES)
1343 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1345 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1346 $(clean-dirs):
1347 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1349 vmlinuxclean:
1350 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1351 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1353 clean: archclean vmlinuxclean
1355 # mrproper - Delete all generated files, including .config
1357 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1358 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1359 mrproper-dirs := $(addprefix _mrproper_,scripts)
1361 PHONY += $(mrproper-dirs) mrproper archmrproper
1362 $(mrproper-dirs):
1363 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1365 mrproper: clean archmrproper $(mrproper-dirs)
1366 $(call cmd,rmdirs)
1367 $(call cmd,rmfiles)
1369 # distclean
1371 PHONY += distclean
1373 distclean: mrproper
1374 @find $(srctree) $(RCS_FIND_IGNORE) \
1375 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1376 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1377 -o -name 'core' \) \
1378 -type f -print | xargs rm -f
1381 # Packaging of the kernel to various formats
1382 # ---------------------------------------------------------------------------
1383 # rpm target kept for backward compatibility
1384 package-dir := scripts/package
1386 %src-pkg: FORCE
1387 $(Q)$(MAKE) $(build)=$(package-dir) $@
1388 %pkg: include/config/kernel.release FORCE
1389 $(Q)$(MAKE) $(build)=$(package-dir) $@
1390 rpm: rpm-pkg
1391 @echo " WARNING: \"rpm\" target will be removed after Linux 4.18"
1392 @echo " Please use \"rpm-pkg\" instead."
1395 # Brief documentation of the typical targets used
1396 # ---------------------------------------------------------------------------
1398 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1399 boards := $(sort $(notdir $(boards)))
1400 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1401 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1403 PHONY += help
1404 help:
1405 @echo 'Cleaning targets:'
1406 @echo ' clean - Remove most generated files but keep the config and'
1407 @echo ' enough build support to build external modules'
1408 @echo ' mrproper - Remove all generated files + config + various backup files'
1409 @echo ' distclean - mrproper + remove editor backup and patch files'
1410 @echo ''
1411 @echo 'Configuration targets:'
1412 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1413 @echo ''
1414 @echo 'Other generic targets:'
1415 @echo ' all - Build all targets marked with [*]'
1416 @echo '* vmlinux - Build the bare kernel'
1417 @echo '* modules - Build all modules'
1418 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1419 @echo ' dir/ - Build all files in dir and below'
1420 @echo ' dir/file.[ois] - Build specified target only'
1421 @echo ' dir/file.ll - Build the LLVM assembly file'
1422 @echo ' (requires compiler support for LLVM assembly generation)'
1423 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1424 @echo ' (requires a recent binutils and recent build (System.map))'
1425 @echo ' dir/file.ko - Build module including final link'
1426 @echo ' modules_prepare - Set up for building external modules'
1427 @echo ' tags/TAGS - Generate tags file for editors'
1428 @echo ' cscope - Generate cscope index'
1429 @echo ' gtags - Generate GNU GLOBAL index'
1430 @echo ' kernelrelease - Output the release version string (use with make -s)'
1431 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1432 @echo ' image_name - Output the image name (use with make -s)'
1433 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1434 echo ' (default: $(INSTALL_HDR_PATH))'; \
1435 echo ''
1436 @echo 'Static analysers:'
1437 @echo ' checkstack - Generate a list of stack hogs'
1438 @echo ' namespacecheck - Name space analysis on compiled kernel'
1439 @echo ' versioncheck - Sanity check on version.h usage'
1440 @echo ' includecheck - Check for duplicate included header files'
1441 @echo ' export_report - List the usages of all exported symbols'
1442 @echo ' headers_check - Sanity check on exported headers'
1443 @echo ' headerdep - Detect inclusion cycles in headers'
1444 @echo ' coccicheck - Check with Coccinelle'
1445 @echo ''
1446 @echo 'Kernel selftest:'
1447 @echo ' kselftest - Build and run kernel selftest (run as root)'
1448 @echo ' Build, install, and boot kernel before'
1449 @echo ' running kselftest on it'
1450 @echo ' kselftest-clean - Remove all generated kselftest files'
1451 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1452 @echo ' .config.'
1453 @echo ''
1454 @echo 'Userspace tools targets:'
1455 @echo ' use "make tools/help"'
1456 @echo ' or "cd tools; make help"'
1457 @echo ''
1458 @echo 'Kernel packaging:'
1459 @$(MAKE) $(build)=$(package-dir) help
1460 @echo ''
1461 @echo 'Documentation targets:'
1462 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1463 @echo ''
1464 @echo 'Architecture specific targets ($(SRCARCH)):'
1465 @$(if $(archhelp),$(archhelp),\
1466 echo ' No architecture specific help defined for $(SRCARCH)')
1467 @echo ''
1468 @$(if $(boards), \
1469 $(foreach b, $(boards), \
1470 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1471 echo '')
1472 @$(if $(board-dirs), \
1473 $(foreach b, $(board-dirs), \
1474 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1475 printf " %-16s - Show all of the above\\n" help-boards; \
1476 echo '')
1478 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1479 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1480 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1481 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1482 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1483 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1484 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1485 @echo ' 1: warnings which may be relevant and do not occur too often'
1486 @echo ' 2: warnings which occur quite often but may still be relevant'
1487 @echo ' 3: more obscure warnings, can most likely be ignored'
1488 @echo ' Multiple levels can be combined with W=12 or W=123'
1489 @echo ''
1490 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1491 @echo 'For further info see the ./README file'
1494 help-board-dirs := $(addprefix help-,$(board-dirs))
1496 help-boards: $(help-board-dirs)
1498 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1500 $(help-board-dirs): help-%:
1501 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1502 @$(if $(boards-per-dir), \
1503 $(foreach b, $(boards-per-dir), \
1504 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1505 echo '')
1508 # Documentation targets
1509 # ---------------------------------------------------------------------------
1510 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1511 linkcheckdocs dochelp refcheckdocs
1512 PHONY += $(DOC_TARGETS)
1513 $(DOC_TARGETS): scripts_basic FORCE
1514 $(Q)$(MAKE) $(build)=Documentation $@
1516 else # KBUILD_EXTMOD
1519 # External module support.
1520 # When building external modules the kernel used as basis is considered
1521 # read-only, and no consistency checks are made and the make
1522 # system is not used on the basis kernel. If updates are required
1523 # in the basis kernel ordinary make commands (without M=...) must
1524 # be used.
1526 # The following are the only valid targets when building external
1527 # modules.
1528 # make M=dir clean Delete all automatically generated files
1529 # make M=dir modules Make all modules in specified dir
1530 # make M=dir Same as 'make M=dir modules'
1531 # make M=dir modules_install
1532 # Install the modules built in the module directory
1533 # Assumes install directory is already created
1535 # We are always building modules
1536 KBUILD_MODULES := 1
1537 PHONY += crmodverdir
1538 crmodverdir:
1539 $(cmd_crmodverdir)
1541 PHONY += $(objtree)/Module.symvers
1542 $(objtree)/Module.symvers:
1543 @test -e $(objtree)/Module.symvers || ( \
1544 echo; \
1545 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1546 echo " is missing; modules will have no dependencies and modversions."; \
1547 echo )
1549 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1550 PHONY += $(module-dirs) modules
1551 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1552 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1554 modules: $(module-dirs)
1555 @$(kecho) ' Building modules, stage 2.';
1556 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1558 PHONY += modules_install
1559 modules_install: _emodinst_ _emodinst_post
1561 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1562 PHONY += _emodinst_
1563 _emodinst_:
1564 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1565 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1567 PHONY += _emodinst_post
1568 _emodinst_post: _emodinst_
1569 $(call cmd,depmod)
1571 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1573 PHONY += $(clean-dirs) clean
1574 $(clean-dirs):
1575 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1577 clean: rm-dirs := $(MODVERDIR)
1578 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1580 PHONY += help
1581 help:
1582 @echo ' Building external modules.'
1583 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1584 @echo ''
1585 @echo ' modules - default target, build the module(s)'
1586 @echo ' modules_install - install the module'
1587 @echo ' clean - remove generated files in module directory only'
1588 @echo ''
1590 # Dummies...
1591 PHONY += prepare scripts
1592 prepare: ;
1593 scripts: ;
1594 endif # KBUILD_EXTMOD
1596 clean: $(clean-dirs)
1597 $(call cmd,rmdirs)
1598 $(call cmd,rmfiles)
1599 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1600 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1601 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
1602 -o -name '*.dwo' -o -name '*.lst' \
1603 -o -name '*.su' \
1604 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1605 -o -name '*.symtypes' -o -name 'modules.order' \
1606 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1607 -o -name .cache.mk \
1608 -o -name '*.c.[012]*.*' \
1609 -o -name '*.ll' \
1610 -o -name '*.gcno' \) -type f -print | xargs rm -f
1612 # Generate tags for editors
1613 # ---------------------------------------------------------------------------
1614 quiet_cmd_tags = GEN $@
1615 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1617 tags TAGS cscope gtags: FORCE
1618 $(call cmd,tags)
1620 # Scripts to check various things for consistency
1621 # ---------------------------------------------------------------------------
1623 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1625 includecheck:
1626 find $(srctree)/* $(RCS_FIND_IGNORE) \
1627 -name '*.[hcS]' -type f -print | sort \
1628 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1630 versioncheck:
1631 find $(srctree)/* $(RCS_FIND_IGNORE) \
1632 -name '*.[hcS]' -type f -print | sort \
1633 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1635 coccicheck:
1636 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1638 namespacecheck:
1639 $(PERL) $(srctree)/scripts/namespace.pl
1641 export_report:
1642 $(PERL) $(srctree)/scripts/export_report.pl
1644 endif #ifeq ($(config-targets),1)
1645 endif #ifeq ($(mixed-targets),1)
1647 PHONY += checkstack kernelrelease kernelversion image_name
1649 # UML needs a little special treatment here. It wants to use the host
1650 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1651 # else wants $(ARCH), including people doing cross-builds, which means
1652 # that $(SUBARCH) doesn't work here.
1653 ifeq ($(ARCH), um)
1654 CHECKSTACK_ARCH := $(SUBARCH)
1655 else
1656 CHECKSTACK_ARCH := $(ARCH)
1657 endif
1658 checkstack:
1659 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1660 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1662 kernelrelease:
1663 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1665 kernelversion:
1666 @echo $(KERNELVERSION)
1668 image_name:
1669 @echo $(KBUILD_IMAGE)
1671 # Clear a bunch of variables before executing the submake
1672 tools/: FORCE
1673 $(Q)mkdir -p $(objtree)/tools
1674 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
1676 tools/%: FORCE
1677 $(Q)mkdir -p $(objtree)/tools
1678 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
1680 # Single targets
1681 # ---------------------------------------------------------------------------
1682 # Single targets are compatible with:
1683 # - build with mixed source and output
1684 # - build with separate output dir 'make O=...'
1685 # - external modules
1687 # target-dir => where to store outputfile
1688 # build-dir => directory in kernel source tree to use
1690 ifeq ($(KBUILD_EXTMOD),)
1691 build-dir = $(patsubst %/,%,$(dir $@))
1692 target-dir = $(dir $@)
1693 else
1694 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1695 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1696 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1697 endif
1699 %.s: %.c prepare scripts FORCE
1700 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1701 %.i: %.c prepare scripts FORCE
1702 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1703 %.o: %.c prepare scripts FORCE
1704 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1705 %.lst: %.c prepare scripts FORCE
1706 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1707 %.s: %.S prepare scripts FORCE
1708 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1709 %.o: %.S prepare scripts FORCE
1710 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1711 %.symtypes: %.c prepare scripts FORCE
1712 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1713 %.ll: %.c prepare scripts FORCE
1714 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1716 # Modules
1717 /: prepare scripts FORCE
1718 $(cmd_crmodverdir)
1719 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1720 $(build)=$(build-dir)
1721 # Make sure the latest headers are built for Documentation
1722 Documentation/ samples/: headers_install
1723 %/: prepare scripts FORCE
1724 $(cmd_crmodverdir)
1725 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1726 $(build)=$(build-dir)
1727 %.ko: prepare scripts FORCE
1728 $(cmd_crmodverdir)
1729 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1730 $(build)=$(build-dir) $(@:.ko=.o)
1731 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1733 # FIXME Should go into a make.lib or something
1734 # ===========================================================================
1736 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1737 cmd_rmdirs = rm -rf $(rm-dirs)
1739 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1740 cmd_rmfiles = rm -f $(rm-files)
1742 # Run depmod only if we have System.map and depmod is executable
1743 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1744 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1745 $(KERNELRELEASE) "$(patsubst y,_,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX))"
1747 # Create temporary dir for module support files
1748 # clean it up only when building all modules
1749 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1750 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1752 # read all saved command lines
1754 cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
1756 ifneq ($(cmd_files),)
1757 $(cmd_files): ; # Do not try to update included dependency files
1758 include $(cmd_files)
1759 endif
1761 endif # skip-makefile
1763 PHONY += FORCE
1764 FORCE:
1766 # Declare the contents of the .PHONY variable as phony. We keep that
1767 # information in a variable so we can use it in if_changed and friends.
1768 .PHONY: $(PHONY)