samples/bpf: extend test_cgrp2_attach2 test to use cgroup storage
[linux/fpc-iii.git] / Makefile
bloba89d8a0d3ee16024149856a903213929aa2963d1
1 # SPDX-License-Identifier: GPL-2.0
2 VERSION = 4
3 PATCHLEVEL = 18
4 SUBLEVEL = 0
5 EXTRAVERSION = -rc5
6 NAME = Merciless Moray
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.a 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 clean-targets := %clean mrproper cleandocs
224 no-dot-config-targets := $(clean-targets) \
225 cscope gtags TAGS tags help% %docs check% coccicheck \
226 $(version_h) headers_% archheaders archscripts \
227 kernelversion %src-pkg
229 config-targets := 0
230 mixed-targets := 0
231 dot-config := 1
233 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
234 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
235 dot-config := 0
236 endif
237 endif
239 ifeq ($(KBUILD_EXTMOD),)
240 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
241 config-targets := 1
242 ifneq ($(words $(MAKECMDGOALS)),1)
243 mixed-targets := 1
244 endif
245 endif
246 endif
248 # For "make -j clean all", "make -j mrproper defconfig all", etc.
249 ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
250 ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
251 mixed-targets := 1
252 endif
253 endif
255 # install and modules_install need also be processed one by one
256 ifneq ($(filter install,$(MAKECMDGOALS)),)
257 ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
258 mixed-targets := 1
259 endif
260 endif
262 ifeq ($(mixed-targets),1)
263 # ===========================================================================
264 # We're called with mixed targets (*config and build targets).
265 # Handle them one by one.
267 PHONY += $(MAKECMDGOALS) __build_one_by_one
269 $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one
272 __build_one_by_one:
273 $(Q)set -e; \
274 for i in $(MAKECMDGOALS); do \
275 $(MAKE) -f $(srctree)/Makefile $$i; \
276 done
278 else
280 # We need some generic definitions (do not try to remake the file).
281 scripts/Kbuild.include: ;
282 include scripts/Kbuild.include
284 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
285 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
286 KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
287 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
289 # SUBARCH tells the usermode build what the underlying arch is. That is set
290 # first, and if a usermode build is happening, the "ARCH=um" on the command
291 # line overrides the setting of ARCH below. If a native build is happening,
292 # then ARCH is assigned, getting whatever value it gets normally, and
293 # SUBARCH is subsequently ignored.
295 SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
296 -e s/sun4u/sparc64/ \
297 -e s/arm.*/arm/ -e s/sa110/arm/ \
298 -e s/s390x/s390/ -e s/parisc64/parisc/ \
299 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
300 -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
301 -e s/riscv.*/riscv/)
303 # Cross compiling and selecting different set of gcc/bin-utils
304 # ---------------------------------------------------------------------------
306 # When performing cross compilation for other architectures ARCH shall be set
307 # to the target architecture. (See arch/* for the possibilities).
308 # ARCH can be set during invocation of make:
309 # make ARCH=ia64
310 # Another way is to have ARCH set in the environment.
311 # The default ARCH is the host where make is executed.
313 # CROSS_COMPILE specify the prefix used for all executables used
314 # during compilation. Only gcc and related bin-utils executables
315 # are prefixed with $(CROSS_COMPILE).
316 # CROSS_COMPILE can be set on the command line
317 # make CROSS_COMPILE=ia64-linux-
318 # Alternatively CROSS_COMPILE can be set in the environment.
319 # Default value for CROSS_COMPILE is not to prefix executables
320 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
321 ARCH ?= $(SUBARCH)
323 # Architecture as present in compile.h
324 UTS_MACHINE := $(ARCH)
325 SRCARCH := $(ARCH)
327 # Additional ARCH settings for x86
328 ifeq ($(ARCH),i386)
329 SRCARCH := x86
330 endif
331 ifeq ($(ARCH),x86_64)
332 SRCARCH := x86
333 endif
335 # Additional ARCH settings for sparc
336 ifeq ($(ARCH),sparc32)
337 SRCARCH := sparc
338 endif
339 ifeq ($(ARCH),sparc64)
340 SRCARCH := sparc
341 endif
343 # Additional ARCH settings for sh
344 ifeq ($(ARCH),sh64)
345 SRCARCH := sh
346 endif
348 KCONFIG_CONFIG ?= .config
349 export KCONFIG_CONFIG
351 # SHELL used by kbuild
352 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
353 else if [ -x /bin/bash ]; then echo /bin/bash; \
354 else echo sh; fi ; fi)
356 HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
357 HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
358 HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null)
360 HOSTCC = gcc
361 HOSTCXX = g++
362 HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \
363 -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS)
364 HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
365 HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
366 HOST_LOADLIBES := $(HOST_LFS_LIBS)
368 # Make variables (CC, etc...)
369 AS = $(CROSS_COMPILE)as
370 LD = $(CROSS_COMPILE)ld
371 CC = $(CROSS_COMPILE)gcc
372 CPP = $(CC) -E
373 AR = $(CROSS_COMPILE)ar
374 NM = $(CROSS_COMPILE)nm
375 STRIP = $(CROSS_COMPILE)strip
376 OBJCOPY = $(CROSS_COMPILE)objcopy
377 OBJDUMP = $(CROSS_COMPILE)objdump
378 LEX = flex
379 YACC = bison
380 AWK = awk
381 GENKSYMS = scripts/genksyms/genksyms
382 INSTALLKERNEL := installkernel
383 DEPMOD = /sbin/depmod
384 PERL = perl
385 PYTHON = python
386 PYTHON2 = python2
387 PYTHON3 = python3
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 LDFLAGS :=
430 GCC_PLUGINS_CFLAGS :=
432 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
433 export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
434 export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
435 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
437 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
438 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
439 export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN
440 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
441 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
442 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
443 export KBUILD_ARFLAGS
445 # When compiling out-of-tree modules, put MODVERDIR in the module
446 # tree rather than in the kernel tree. The kernel tree might
447 # even be read-only.
448 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
450 # Files to ignore in find ... statements
452 export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \
453 -name CVS -o -name .pc -o -name .hg -o -name .git \) \
454 -prune -o
455 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \
456 --exclude CVS --exclude .pc --exclude .hg --exclude .git
458 # ===========================================================================
459 # Rules shared between *config targets and build targets
461 # Basic helpers built in scripts/basic/
462 PHONY += scripts_basic
463 scripts_basic:
464 $(Q)$(MAKE) $(build)=scripts/basic
465 $(Q)rm -f .tmp_quiet_recordmcount
467 # To avoid any implicit rule to kick in, define an empty command.
468 scripts/basic/%: scripts_basic ;
470 PHONY += outputmakefile
471 # outputmakefile generates a Makefile in the output directory, if using a
472 # separate output directory. This allows convenient use of make in the
473 # output directory.
474 outputmakefile:
475 ifneq ($(KBUILD_SRC),)
476 $(Q)ln -fsn $(srctree) source
477 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
478 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
479 endif
481 ifeq ($(cc-name),clang)
482 ifneq ($(CROSS_COMPILE),)
483 CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
484 GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
485 endif
486 ifneq ($(GCC_TOOLCHAIN),)
487 CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
488 endif
489 KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
490 KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
491 KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
492 KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
493 endif
495 RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
496 RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
497 RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
498 export RETPOLINE_CFLAGS
500 KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
501 KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
503 # check for 'asm goto'
504 ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
505 CC_HAVE_ASM_GOTO := 1
506 KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO
507 KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
508 endif
510 # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
511 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
512 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
513 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
514 CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
516 ifeq ($(config-targets),1)
517 # ===========================================================================
518 # *config targets only - make sure prerequisites are updated, and descend
519 # in scripts/kconfig to make the *config target
521 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
522 # KBUILD_DEFCONFIG may point out an alternative default configuration
523 # used for 'make defconfig'
524 include arch/$(SRCARCH)/Makefile
525 export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
527 config: scripts_basic outputmakefile FORCE
528 $(Q)$(MAKE) $(build)=scripts/kconfig $@
530 %config: scripts_basic outputmakefile FORCE
531 $(Q)$(MAKE) $(build)=scripts/kconfig $@
533 else
534 # ===========================================================================
535 # Build targets only - this includes vmlinux, arch specific targets, clean
536 # targets and others. In general all targets except *config targets.
538 # If building an external module we do not care about the all: rule
539 # but instead _all depend on modules
540 PHONY += all
541 ifeq ($(KBUILD_EXTMOD),)
542 _all: all
543 else
544 _all: modules
545 endif
547 # Decide whether to build built-in, modular, or both.
548 # Normally, just do built-in.
550 KBUILD_MODULES :=
551 KBUILD_BUILTIN := 1
553 # If we have only "make modules", don't compile built-in objects.
554 # When we're building modules with modversions, we need to consider
555 # the built-in objects during the descend as well, in order to
556 # make sure the checksums are up to date before we record them.
558 ifeq ($(MAKECMDGOALS),modules)
559 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
560 endif
562 # If we have "make <whatever> modules", compile modules
563 # in addition to whatever we do anyway.
564 # Just "make" or "make all" shall build modules as well
566 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
567 KBUILD_MODULES := 1
568 endif
570 ifeq ($(MAKECMDGOALS),)
571 KBUILD_MODULES := 1
572 endif
574 export KBUILD_MODULES KBUILD_BUILTIN
576 ifeq ($(KBUILD_EXTMOD),)
577 # Objects we will link into vmlinux / subdirs we need to visit
578 init-y := init/
579 drivers-y := drivers/ sound/ firmware/
580 net-y := net/
581 libs-y := lib/
582 core-y := usr/
583 virt-y := virt/
584 endif # KBUILD_EXTMOD
586 ifeq ($(dot-config),1)
587 -include include/config/auto.conf
588 endif
590 # The all: target is the default when no target is given on the
591 # command line.
592 # This allow a user to issue only 'make' to build a kernel including modules
593 # Defaults to vmlinux, but the arch makefile usually adds further targets
594 all: vmlinux
596 CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
597 $(call cc-option,-fno-tree-loop-im) \
598 $(call cc-disable-warning,maybe-uninitialized,)
599 export CFLAGS_GCOV
601 # The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
602 # values of the respective KBUILD_* variables
603 ARCH_CPPFLAGS :=
604 ARCH_AFLAGS :=
605 ARCH_CFLAGS :=
606 include arch/$(SRCARCH)/Makefile
608 ifeq ($(dot-config),1)
609 ifeq ($(KBUILD_EXTMOD),)
610 # Read in dependencies to all Kconfig* files, make sure to run syncconfig if
611 # changes are detected. This should be included after arch/$(SRCARCH)/Makefile
612 # because some architectures define CROSS_COMPILE there.
613 -include include/config/auto.conf.cmd
615 # To avoid any implicit rule to kick in, define an empty command
616 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
618 # The actual configuration files used during the build are stored in
619 # include/generated/ and include/config/. Update them if .config is newer than
620 # include/config/auto.conf (which mirrors .config).
621 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
622 $(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
623 else
624 # external modules needs include/generated/autoconf.h and include/config/auto.conf
625 # but do not care if they are up-to-date. Use auto.conf to trigger the test
626 PHONY += include/config/auto.conf
628 include/config/auto.conf:
629 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
630 echo >&2; \
631 echo >&2 " ERROR: Kernel configuration is invalid."; \
632 echo >&2 " include/generated/autoconf.h or $@ are missing.";\
633 echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
634 echo >&2 ; \
635 /bin/false)
637 endif # KBUILD_EXTMOD
639 else
640 # Dummy target needed, because used as prerequisite
641 include/config/auto.conf: ;
642 endif # $(dot-config)
644 KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
645 KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
646 KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
647 KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
648 KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context)
650 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
651 KBUILD_CFLAGS += $(call cc-option,-Oz,-Os)
652 KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,)
653 else
654 ifdef CONFIG_PROFILE_ALL_BRANCHES
655 KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,)
656 else
657 KBUILD_CFLAGS += -O2
658 endif
659 endif
661 KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \
662 $(call cc-disable-warning,maybe-uninitialized,))
664 # Tell gcc to never replace conditional load with a non-conditional one
665 KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0)
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 stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
685 stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector
686 stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
688 KBUILD_CFLAGS += $(stackp-flags-y)
690 ifeq ($(cc-name),clang)
691 KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
692 KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
693 KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
694 KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
695 # Quiet clang warning: comparison of unsigned expression < 0 is always false
696 KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
697 # CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
698 # source of a reference will be _MergedGlobals and not on of the whitelisted names.
699 # See modpost pattern 2
700 KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
701 KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
702 else
704 # These warnings generated too much noise in a regular build.
705 # Use make W=1 to enable them (see scripts/Makefile.extrawarn)
706 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
707 endif
709 KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
710 ifdef CONFIG_FRAME_POINTER
711 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
712 else
713 # Some targets (ARM with Thumb2, for example), can't be built with frame
714 # pointers. For those, we don't have FUNCTION_TRACER automatically
715 # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is
716 # incompatible with -fomit-frame-pointer with current GCC, so we don't use
717 # -fomit-frame-pointer with FUNCTION_TRACER.
718 ifndef CONFIG_FUNCTION_TRACER
719 KBUILD_CFLAGS += -fomit-frame-pointer
720 endif
721 endif
723 KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments)
725 ifdef CONFIG_DEBUG_INFO
726 ifdef CONFIG_DEBUG_INFO_SPLIT
727 KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g)
728 else
729 KBUILD_CFLAGS += -g
730 endif
731 KBUILD_AFLAGS += -Wa,-gdwarf-2
732 endif
733 ifdef CONFIG_DEBUG_INFO_DWARF4
734 KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,)
735 endif
737 ifdef CONFIG_DEBUG_INFO_REDUCED
738 KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \
739 $(call cc-option,-fno-var-tracking)
740 endif
742 ifdef CONFIG_FUNCTION_TRACER
743 ifndef CC_FLAGS_FTRACE
744 CC_FLAGS_FTRACE := -pg
745 endif
746 export CC_FLAGS_FTRACE
747 ifdef CONFIG_HAVE_FENTRY
748 CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
749 endif
750 KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
751 KBUILD_AFLAGS += $(CC_USING_FENTRY)
752 ifdef CONFIG_DYNAMIC_FTRACE
753 ifdef CONFIG_HAVE_C_RECORDMCOUNT
754 BUILD_C_RECORDMCOUNT := y
755 export BUILD_C_RECORDMCOUNT
756 endif
757 endif
758 endif
760 # We trigger additional mismatches with less inlining
761 ifdef CONFIG_DEBUG_SECTION_MISMATCH
762 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
763 endif
765 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
766 KBUILD_CFLAGS_KERNEL += $(call cc-option,-ffunction-sections,)
767 KBUILD_CFLAGS_KERNEL += $(call cc-option,-fdata-sections,)
768 endif
770 # arch Makefile may override CC so keep this after arch Makefile is included
771 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
773 # warn about C99 declaration after statement
774 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
776 # disable pointer signed / unsigned warnings in gcc 4.0
777 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
779 # disable invalid "can't wrap" optimizations for signed / pointers
780 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
782 # clang sets -fmerge-all-constants by default as optimization, but this
783 # is non-conforming behavior for C and in fact breaks the kernel, so we
784 # need to disable it here generally.
785 KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants)
787 # for gcc -fno-merge-all-constants disables everything, but it is fine
788 # to have actual conforming behavior enabled.
789 KBUILD_CFLAGS += $(call cc-option,-fmerge-constants)
791 # Make sure -fstack-check isn't enabled (like gentoo apparently did)
792 KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
794 # conserve stack if available
795 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
797 # disallow errors like 'EXPORT_GPL(foo);' with missing header
798 KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
800 # require functions to have arguments in prototypes, not empty 'int foo()'
801 KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
803 # Prohibit date/time macros, which would make the build non-deterministic
804 KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
806 # enforce correct pointer usage
807 KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types)
809 # Require designated initializers for all marked structures
810 KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
812 # change __FILE__ to the relative path from the srctree
813 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
815 # use the deterministic mode of AR if available
816 KBUILD_ARFLAGS := $(call ar-option,D)
818 include scripts/Makefile.kasan
819 include scripts/Makefile.extrawarn
820 include scripts/Makefile.ubsan
822 # Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
823 # last assignments
824 KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
825 KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
826 KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
828 # Use --build-id when available.
829 LDFLAGS_BUILD_ID := $(call ld-option, --build-id)
830 KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
831 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
833 ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
834 LDFLAGS_vmlinux += $(call ld-option, --gc-sections,)
835 endif
837 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
838 LDFLAGS_vmlinux += $(call ld-option, -X,)
839 endif
841 # insure the checker run with the right endianness
842 CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
844 # the checker needs the correct machine size
845 CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32)
847 # Default kernel image to build when no specific target is given.
848 # KBUILD_IMAGE may be overruled on the command line or
849 # set in the environment
850 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
851 # this default value
852 export KBUILD_IMAGE ?= vmlinux
855 # INSTALL_PATH specifies where to place the updated kernel and system map
856 # images. Default is /boot, but you can set it to other values
857 export INSTALL_PATH ?= /boot
860 # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots.
861 # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as
862 # an argument if needed. Otherwise it defaults to the kernel install path
864 export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE)
867 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
868 # relocations required by build roots. This is not defined in the
869 # makefile but the argument can be passed to make if needed.
872 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
873 export MODLIB
876 # INSTALL_MOD_STRIP, if defined, will cause modules to be
877 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
878 # the default option --strip-debug will be used. Otherwise,
879 # INSTALL_MOD_STRIP value will be used as the options to the strip command.
881 ifdef INSTALL_MOD_STRIP
882 ifeq ($(INSTALL_MOD_STRIP),1)
883 mod_strip_cmd = $(STRIP) --strip-debug
884 else
885 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
886 endif # INSTALL_MOD_STRIP=1
887 else
888 mod_strip_cmd = true
889 endif # INSTALL_MOD_STRIP
890 export mod_strip_cmd
892 # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed
893 # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP
894 # or CONFIG_MODULE_COMPRESS_XZ.
896 mod_compress_cmd = true
897 ifdef CONFIG_MODULE_COMPRESS
898 ifdef CONFIG_MODULE_COMPRESS_GZIP
899 mod_compress_cmd = gzip -n -f
900 endif # CONFIG_MODULE_COMPRESS_GZIP
901 ifdef CONFIG_MODULE_COMPRESS_XZ
902 mod_compress_cmd = xz -f
903 endif # CONFIG_MODULE_COMPRESS_XZ
904 endif # CONFIG_MODULE_COMPRESS
905 export mod_compress_cmd
907 # Select initial ramdisk compression format, default is gzip(1).
908 # This shall be used by the dracut(8) tool while creating an initramfs image.
910 INITRD_COMPRESS-y := gzip
911 INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
912 INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
913 INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
914 INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
915 INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
916 # do not export INITRD_COMPRESS, since we didn't actually
917 # choose a sane default compression above.
918 # export INITRD_COMPRESS := $(INITRD_COMPRESS-y)
920 ifdef CONFIG_MODULE_SIG_ALL
921 $(eval $(call config_filename,MODULE_SIG_KEY))
923 mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509
924 else
925 mod_sign_cmd = true
926 endif
927 export mod_sign_cmd
929 ifdef CONFIG_STACK_VALIDATION
930 has_libelf := $(call try-run,\
931 echo "int main() {}" | $(HOSTCC) -xc -o /dev/null -lelf -,1,0)
932 ifeq ($(has_libelf),1)
933 objtool_target := tools/objtool FORCE
934 else
935 ifdef CONFIG_UNWINDER_ORC
936 $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
937 else
938 $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel")
939 endif
940 SKIP_STACK_VALIDATION := 1
941 export SKIP_STACK_VALIDATION
942 endif
943 endif
946 ifeq ($(KBUILD_EXTMOD),)
947 core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
949 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
950 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
951 $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y)))
953 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
954 $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-))))
956 init-y := $(patsubst %/, %/built-in.a, $(init-y))
957 core-y := $(patsubst %/, %/built-in.a, $(core-y))
958 drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
959 net-y := $(patsubst %/, %/built-in.a, $(net-y))
960 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
961 libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y)))
962 virt-y := $(patsubst %/, %/built-in.a, $(virt-y))
964 # Externally visible symbols (used by link-vmlinux.sh)
965 export KBUILD_VMLINUX_INIT := $(head-y) $(init-y)
966 export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y)
967 export KBUILD_VMLINUX_LIBS := $(libs-y1)
968 export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
969 export LDFLAGS_vmlinux
970 # used by scripts/package/Makefile
971 export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools)
973 vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS)
975 # Recurse until adjust_autoksyms.sh is satisfied
976 PHONY += autoksyms_recursive
977 autoksyms_recursive: $(vmlinux-deps)
978 ifdef CONFIG_TRIM_UNUSED_KSYMS
979 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
980 "$(MAKE) -f $(srctree)/Makefile vmlinux"
981 endif
983 # For the kernel to actually contain only the needed exported symbols,
984 # we have to build modules as well to determine what those symbols are.
985 # (this can be evaluated only once include/config/auto.conf has been included)
986 ifdef CONFIG_TRIM_UNUSED_KSYMS
987 KBUILD_MODULES := 1
988 endif
990 autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h)
992 $(autoksyms_h):
993 $(Q)mkdir -p $(dir $@)
994 $(Q)touch $@
996 ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
998 # Final link of vmlinux with optional arch pass after final link
999 cmd_link-vmlinux = \
1000 $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ; \
1001 $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
1003 vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
1004 ifdef CONFIG_HEADERS_CHECK
1005 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
1006 endif
1007 ifdef CONFIG_GDB_SCRIPTS
1008 $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
1009 endif
1010 +$(call if_changed,link-vmlinux)
1012 # Build samples along the rest of the kernel
1013 ifdef CONFIG_SAMPLES
1014 vmlinux-dirs += samples
1015 endif
1017 # The actual objects are generated when descending,
1018 # make sure no implicit rule kicks in
1019 $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
1021 # Handle descending into subdirectories listed in $(vmlinux-dirs)
1022 # Preset locale variables to speed up the build process. Limit locale
1023 # tweaks to this spot to avoid wrong language settings when running
1024 # make menuconfig etc.
1025 # Error messages still appears in the original language
1027 PHONY += $(vmlinux-dirs)
1028 $(vmlinux-dirs): prepare scripts
1029 $(Q)$(MAKE) $(build)=$@ need-builtin=1
1031 define filechk_kernel.release
1032 echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1033 endef
1035 # Store (new) KERNELRELEASE string in include/config/kernel.release
1036 include/config/kernel.release: include/config/auto.conf FORCE
1037 $(call filechk,kernel.release)
1039 # Additional helpers built in scripts/
1040 # Carefully list dependencies so we do not try to build scripts twice
1041 # in parallel
1042 PHONY += scripts
1043 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf \
1044 asm-generic gcc-plugins $(autoksyms_h)
1045 $(Q)$(MAKE) $(build)=$(@)
1047 # Things we need to do before we recursively start building the kernel
1048 # or the modules are listed in "prepare".
1049 # A multi level approach is used. prepareN is processed before prepareN-1.
1050 # archprepare is used in arch Makefiles and when processed asm symlink,
1051 # version.h and scripts_basic is processed / created.
1053 # Listed in dependency order
1054 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
1056 # prepare3 is used to check if we are building in a separate output directory,
1057 # and if so do:
1058 # 1) Check that make has not been executed in the kernel src $(srctree)
1059 prepare3: include/config/kernel.release
1060 ifneq ($(KBUILD_SRC),)
1061 @$(kecho) ' Using $(srctree) as source for kernel'
1062 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
1063 echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \
1064 echo >&2 " in the '$(srctree)' directory.";\
1065 /bin/false; \
1067 endif
1069 # prepare2 creates a makefile if using a separate output directory.
1070 # From this point forward, .config has been reprocessed, so any rules
1071 # that need to depend on updated CONFIG_* values can be checked here.
1072 prepare2: prepare3 outputmakefile asm-generic
1074 prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
1075 include/config/auto.conf
1076 $(cmd_crmodverdir)
1078 archprepare: archheaders archscripts prepare1 scripts_basic
1080 prepare0: archprepare gcc-plugins
1081 $(Q)$(MAKE) $(build)=.
1083 # All the preparing..
1084 prepare: prepare0 prepare-objtool
1086 # Support for using generic headers in asm-generic
1087 PHONY += asm-generic uapi-asm-generic
1088 asm-generic: uapi-asm-generic
1089 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1090 src=asm obj=arch/$(SRCARCH)/include/generated/asm
1091 uapi-asm-generic:
1092 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
1093 src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
1095 PHONY += prepare-objtool
1096 prepare-objtool: $(objtool_target)
1098 # Generate some files
1099 # ---------------------------------------------------------------------------
1101 # KERNELRELEASE can change from a few different places, meaning version.h
1102 # needs to be updated, so this check is forced on all builds
1104 uts_len := 64
1105 define filechk_utsrelease.h
1106 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1107 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1108 exit 1; \
1109 fi; \
1110 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1111 endef
1113 define filechk_version.h
1114 (echo \#define LINUX_VERSION_CODE $(shell \
1115 expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \
1116 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1117 endef
1119 $(version_h): $(srctree)/Makefile FORCE
1120 $(call filechk,version.h)
1121 $(Q)rm -f $(old_version_h)
1123 include/generated/utsrelease.h: include/config/kernel.release FORCE
1124 $(call filechk,utsrelease.h)
1126 PHONY += headerdep
1127 headerdep:
1128 $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
1129 $(srctree)/scripts/headerdep.pl -I$(srctree)/include
1131 # ---------------------------------------------------------------------------
1132 # Kernel headers
1134 #Default location for installed headers
1135 export INSTALL_HDR_PATH = $(objtree)/usr
1137 # If we do an all arch process set dst to include/arch-$(SRCARCH)
1138 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include)
1140 PHONY += archheaders
1141 archheaders:
1143 PHONY += archscripts
1144 archscripts:
1146 PHONY += __headers
1147 __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts
1148 $(Q)$(MAKE) $(build)=scripts build_unifdef
1150 PHONY += headers_install_all
1151 headers_install_all:
1152 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1154 PHONY += headers_install
1155 headers_install: __headers
1156 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \
1157 $(error Headers not exportable for the $(SRCARCH) architecture))
1158 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include
1159 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst)
1161 PHONY += headers_check_all
1162 headers_check_all: headers_install_all
1163 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1165 PHONY += headers_check
1166 headers_check: headers_install
1167 $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
1168 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
1170 # ---------------------------------------------------------------------------
1171 # Kernel selftest
1173 PHONY += kselftest
1174 kselftest:
1175 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests
1177 PHONY += kselftest-clean
1178 kselftest-clean:
1179 $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean
1181 PHONY += kselftest-merge
1182 kselftest-merge:
1183 $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
1184 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
1185 -m $(objtree)/.config \
1186 $(srctree)/tools/testing/selftests/*/config
1187 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
1189 # ---------------------------------------------------------------------------
1190 # Modules
1192 ifdef CONFIG_MODULES
1194 # By default, build modules as well
1196 all: modules
1198 # Build modules
1200 # A module can be listed more than once in obj-m resulting in
1201 # duplicate lines in modules.order files. Those are removed
1202 # using awk while concatenating to the final file.
1204 PHONY += modules
1205 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin
1206 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1207 @$(kecho) ' Building modules, stage 2.';
1208 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1210 modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
1211 $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin
1213 %/modules.builtin: include/config/auto.conf
1214 $(Q)$(MAKE) $(modbuiltin)=$*
1217 # Target to prepare building external modules
1218 PHONY += modules_prepare
1219 modules_prepare: prepare scripts
1221 # Target to install modules
1222 PHONY += modules_install
1223 modules_install: _modinst_ _modinst_post
1225 PHONY += _modinst_
1226 _modinst_:
1227 @rm -rf $(MODLIB)/kernel
1228 @rm -f $(MODLIB)/source
1229 @mkdir -p $(MODLIB)/kernel
1230 @ln -s $(abspath $(srctree)) $(MODLIB)/source
1231 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1232 rm -f $(MODLIB)/build ; \
1233 ln -s $(CURDIR) $(MODLIB)/build ; \
1235 @cp -f $(objtree)/modules.order $(MODLIB)/
1236 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1237 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1239 # This depmod is only for convenience to give the initial
1240 # boot a modules.dep even before / is mounted read-write. However the
1241 # boot script depmod is the master version.
1242 PHONY += _modinst_post
1243 _modinst_post: _modinst_
1244 $(call cmd,depmod)
1246 ifeq ($(CONFIG_MODULE_SIG), y)
1247 PHONY += modules_sign
1248 modules_sign:
1249 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign
1250 endif
1252 else # CONFIG_MODULES
1254 # Modules not configured
1255 # ---------------------------------------------------------------------------
1257 PHONY += modules modules_install
1258 modules modules_install:
1259 @echo >&2
1260 @echo >&2 "The present kernel configuration has modules disabled."
1261 @echo >&2 "Type 'make config' and enable loadable module support."
1262 @echo >&2 "Then build a kernel with module support enabled."
1263 @echo >&2
1264 @exit 1
1266 endif # CONFIG_MODULES
1269 # Cleaning is done on three levels.
1270 # make clean Delete most generated files
1271 # Leave enough to build external modules
1272 # make mrproper Delete the current configuration, and all generated files
1273 # make distclean Remove editor backup files, patch leftover files and the like
1275 # Directories & files removed with 'make clean'
1276 CLEAN_DIRS += $(MODVERDIR) include/ksym
1278 # Directories & files removed with 'make mrproper'
1279 MRPROPER_DIRS += include/config usr/include include/generated \
1280 arch/*/include/generated .tmp_objdiff
1281 MRPROPER_FILES += .config .config.old .version \
1282 Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \
1283 signing_key.pem signing_key.priv signing_key.x509 \
1284 x509.genkey extra_certificates signing_key.x509.keyid \
1285 signing_key.x509.signer vmlinux-gdb.py
1287 # clean - Delete most, but leave enough to build external modules
1289 clean: rm-dirs := $(CLEAN_DIRS)
1290 clean: rm-files := $(CLEAN_FILES)
1291 clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples)
1293 PHONY += $(clean-dirs) clean archclean vmlinuxclean
1294 $(clean-dirs):
1295 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1297 vmlinuxclean:
1298 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
1299 $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean)
1301 clean: archclean vmlinuxclean
1303 # mrproper - Delete all generated files, including .config
1305 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1306 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1307 mrproper-dirs := $(addprefix _mrproper_,scripts)
1309 PHONY += $(mrproper-dirs) mrproper archmrproper
1310 $(mrproper-dirs):
1311 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1313 mrproper: clean archmrproper $(mrproper-dirs)
1314 $(call cmd,rmdirs)
1315 $(call cmd,rmfiles)
1317 # distclean
1319 PHONY += distclean
1321 distclean: mrproper
1322 @find $(srctree) $(RCS_FIND_IGNORE) \
1323 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1324 -o -name '*.bak' -o -name '#*#' -o -name '*%' \
1325 -o -name 'core' \) \
1326 -type f -print | xargs rm -f
1329 # Packaging of the kernel to various formats
1330 # ---------------------------------------------------------------------------
1331 # rpm target kept for backward compatibility
1332 package-dir := scripts/package
1334 %src-pkg: FORCE
1335 $(Q)$(MAKE) $(build)=$(package-dir) $@
1336 %pkg: include/config/kernel.release FORCE
1337 $(Q)$(MAKE) $(build)=$(package-dir) $@
1338 rpm: rpm-pkg
1339 @echo " WARNING: \"rpm\" target will be removed after Linux 4.18"
1340 @echo " Please use \"rpm-pkg\" instead."
1343 # Brief documentation of the typical targets used
1344 # ---------------------------------------------------------------------------
1346 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1347 boards := $(sort $(notdir $(boards)))
1348 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1349 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1351 PHONY += help
1352 help:
1353 @echo 'Cleaning targets:'
1354 @echo ' clean - Remove most generated files but keep the config and'
1355 @echo ' enough build support to build external modules'
1356 @echo ' mrproper - Remove all generated files + config + various backup files'
1357 @echo ' distclean - mrproper + remove editor backup and patch files'
1358 @echo ''
1359 @echo 'Configuration targets:'
1360 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1361 @echo ''
1362 @echo 'Other generic targets:'
1363 @echo ' all - Build all targets marked with [*]'
1364 @echo '* vmlinux - Build the bare kernel'
1365 @echo '* modules - Build all modules'
1366 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1367 @echo ' dir/ - Build all files in dir and below'
1368 @echo ' dir/file.[ois] - Build specified target only'
1369 @echo ' dir/file.ll - Build the LLVM assembly file'
1370 @echo ' (requires compiler support for LLVM assembly generation)'
1371 @echo ' dir/file.lst - Build specified mixed source/assembly target only'
1372 @echo ' (requires a recent binutils and recent build (System.map))'
1373 @echo ' dir/file.ko - Build module including final link'
1374 @echo ' modules_prepare - Set up for building external modules'
1375 @echo ' tags/TAGS - Generate tags file for editors'
1376 @echo ' cscope - Generate cscope index'
1377 @echo ' gtags - Generate GNU GLOBAL index'
1378 @echo ' kernelrelease - Output the release version string (use with make -s)'
1379 @echo ' kernelversion - Output the version stored in Makefile (use with make -s)'
1380 @echo ' image_name - Output the image name (use with make -s)'
1381 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1382 echo ' (default: $(INSTALL_HDR_PATH))'; \
1383 echo ''
1384 @echo 'Static analysers:'
1385 @echo ' checkstack - Generate a list of stack hogs'
1386 @echo ' namespacecheck - Name space analysis on compiled kernel'
1387 @echo ' versioncheck - Sanity check on version.h usage'
1388 @echo ' includecheck - Check for duplicate included header files'
1389 @echo ' export_report - List the usages of all exported symbols'
1390 @echo ' headers_check - Sanity check on exported headers'
1391 @echo ' headerdep - Detect inclusion cycles in headers'
1392 @echo ' coccicheck - Check with Coccinelle'
1393 @echo ''
1394 @echo 'Kernel selftest:'
1395 @echo ' kselftest - Build and run kernel selftest (run as root)'
1396 @echo ' Build, install, and boot kernel before'
1397 @echo ' running kselftest on it'
1398 @echo ' kselftest-clean - Remove all generated kselftest files'
1399 @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
1400 @echo ' .config.'
1401 @echo ''
1402 @echo 'Userspace tools targets:'
1403 @echo ' use "make tools/help"'
1404 @echo ' or "cd tools; make help"'
1405 @echo ''
1406 @echo 'Kernel packaging:'
1407 @$(MAKE) $(build)=$(package-dir) help
1408 @echo ''
1409 @echo 'Documentation targets:'
1410 @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
1411 @echo ''
1412 @echo 'Architecture specific targets ($(SRCARCH)):'
1413 @$(if $(archhelp),$(archhelp),\
1414 echo ' No architecture specific help defined for $(SRCARCH)')
1415 @echo ''
1416 @$(if $(boards), \
1417 $(foreach b, $(boards), \
1418 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1419 echo '')
1420 @$(if $(board-dirs), \
1421 $(foreach b, $(board-dirs), \
1422 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1423 printf " %-16s - Show all of the above\\n" help-boards; \
1424 echo '')
1426 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1427 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1428 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1429 @echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
1430 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1431 @echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
1432 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1433 @echo ' 1: warnings which may be relevant and do not occur too often'
1434 @echo ' 2: warnings which occur quite often but may still be relevant'
1435 @echo ' 3: more obscure warnings, can most likely be ignored'
1436 @echo ' Multiple levels can be combined with W=12 or W=123'
1437 @echo ''
1438 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1439 @echo 'For further info see the ./README file'
1442 help-board-dirs := $(addprefix help-,$(board-dirs))
1444 help-boards: $(help-board-dirs)
1446 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
1448 $(help-board-dirs): help-%:
1449 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1450 @$(if $(boards-per-dir), \
1451 $(foreach b, $(boards-per-dir), \
1452 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1453 echo '')
1456 # Documentation targets
1457 # ---------------------------------------------------------------------------
1458 DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
1459 linkcheckdocs dochelp refcheckdocs
1460 PHONY += $(DOC_TARGETS)
1461 $(DOC_TARGETS): scripts_basic FORCE
1462 $(Q)$(MAKE) $(build)=Documentation $@
1464 else # KBUILD_EXTMOD
1467 # External module support.
1468 # When building external modules the kernel used as basis is considered
1469 # read-only, and no consistency checks are made and the make
1470 # system is not used on the basis kernel. If updates are required
1471 # in the basis kernel ordinary make commands (without M=...) must
1472 # be used.
1474 # The following are the only valid targets when building external
1475 # modules.
1476 # make M=dir clean Delete all automatically generated files
1477 # make M=dir modules Make all modules in specified dir
1478 # make M=dir Same as 'make M=dir modules'
1479 # make M=dir modules_install
1480 # Install the modules built in the module directory
1481 # Assumes install directory is already created
1483 # We are always building modules
1484 KBUILD_MODULES := 1
1485 PHONY += crmodverdir
1486 crmodverdir:
1487 $(cmd_crmodverdir)
1489 PHONY += $(objtree)/Module.symvers
1490 $(objtree)/Module.symvers:
1491 @test -e $(objtree)/Module.symvers || ( \
1492 echo; \
1493 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1494 echo " is missing; modules will have no dependencies and modversions."; \
1495 echo )
1497 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1498 PHONY += $(module-dirs) modules
1499 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1500 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1502 modules: $(module-dirs)
1503 @$(kecho) ' Building modules, stage 2.';
1504 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1506 PHONY += modules_install
1507 modules_install: _emodinst_ _emodinst_post
1509 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1510 PHONY += _emodinst_
1511 _emodinst_:
1512 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1513 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1515 PHONY += _emodinst_post
1516 _emodinst_post: _emodinst_
1517 $(call cmd,depmod)
1519 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1521 PHONY += $(clean-dirs) clean
1522 $(clean-dirs):
1523 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1525 clean: rm-dirs := $(MODVERDIR)
1526 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1528 PHONY += help
1529 help:
1530 @echo ' Building external modules.'
1531 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1532 @echo ''
1533 @echo ' modules - default target, build the module(s)'
1534 @echo ' modules_install - install the module'
1535 @echo ' clean - remove generated files in module directory only'
1536 @echo ''
1538 # Dummies...
1539 PHONY += prepare scripts
1540 prepare: ;
1541 scripts: ;
1542 endif # KBUILD_EXTMOD
1544 clean: $(clean-dirs)
1545 $(call cmd,rmdirs)
1546 $(call cmd,rmfiles)
1547 @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
1548 \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
1549 -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
1550 -o -name '*.dwo' -o -name '*.lst' \
1551 -o -name '*.su' \
1552 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1553 -o -name '*.lex.c' -o -name '*.tab.[ch]' \
1554 -o -name '*.asn1.[ch]' \
1555 -o -name '*.symtypes' -o -name 'modules.order' \
1556 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1557 -o -name '*.c.[012]*.*' \
1558 -o -name '*.ll' \
1559 -o -name '*.gcno' \) -type f -print | xargs rm -f
1561 # Generate tags for editors
1562 # ---------------------------------------------------------------------------
1563 quiet_cmd_tags = GEN $@
1564 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1566 tags TAGS cscope gtags: FORCE
1567 $(call cmd,tags)
1569 # Scripts to check various things for consistency
1570 # ---------------------------------------------------------------------------
1572 PHONY += includecheck versioncheck coccicheck namespacecheck export_report
1574 includecheck:
1575 find $(srctree)/* $(RCS_FIND_IGNORE) \
1576 -name '*.[hcS]' -type f -print | sort \
1577 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1579 versioncheck:
1580 find $(srctree)/* $(RCS_FIND_IGNORE) \
1581 -name '*.[hcS]' -type f -print | sort \
1582 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1584 coccicheck:
1585 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
1587 namespacecheck:
1588 $(PERL) $(srctree)/scripts/namespace.pl
1590 export_report:
1591 $(PERL) $(srctree)/scripts/export_report.pl
1593 endif #ifeq ($(config-targets),1)
1594 endif #ifeq ($(mixed-targets),1)
1596 PHONY += checkstack kernelrelease kernelversion image_name
1598 # UML needs a little special treatment here. It wants to use the host
1599 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1600 # else wants $(ARCH), including people doing cross-builds, which means
1601 # that $(SUBARCH) doesn't work here.
1602 ifeq ($(ARCH), um)
1603 CHECKSTACK_ARCH := $(SUBARCH)
1604 else
1605 CHECKSTACK_ARCH := $(ARCH)
1606 endif
1607 checkstack:
1608 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1609 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1611 kernelrelease:
1612 @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
1614 kernelversion:
1615 @echo $(KERNELVERSION)
1617 image_name:
1618 @echo $(KBUILD_IMAGE)
1620 # Clear a bunch of variables before executing the submake
1621 tools/: FORCE
1622 $(Q)mkdir -p $(objtree)/tools
1623 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
1625 tools/%: FORCE
1626 $(Q)mkdir -p $(objtree)/tools
1627 $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
1629 # Single targets
1630 # ---------------------------------------------------------------------------
1631 # Single targets are compatible with:
1632 # - build with mixed source and output
1633 # - build with separate output dir 'make O=...'
1634 # - external modules
1636 # target-dir => where to store outputfile
1637 # build-dir => directory in kernel source tree to use
1639 ifeq ($(KBUILD_EXTMOD),)
1640 build-dir = $(patsubst %/,%,$(dir $@))
1641 target-dir = $(dir $@)
1642 else
1643 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1644 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1645 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1646 endif
1648 %.s: %.c prepare scripts FORCE
1649 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1650 %.i: %.c prepare scripts FORCE
1651 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1652 %.o: %.c prepare scripts FORCE
1653 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1654 %.lst: %.c prepare scripts FORCE
1655 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1656 %.s: %.S prepare scripts FORCE
1657 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1658 %.o: %.S prepare scripts FORCE
1659 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1660 %.symtypes: %.c prepare scripts FORCE
1661 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1662 %.ll: %.c prepare scripts FORCE
1663 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1665 # Modules
1666 /: prepare scripts FORCE
1667 $(cmd_crmodverdir)
1668 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1669 $(build)=$(build-dir)
1670 # Make sure the latest headers are built for Documentation
1671 Documentation/ samples/: headers_install
1672 %/: prepare scripts FORCE
1673 $(cmd_crmodverdir)
1674 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1675 $(build)=$(build-dir)
1676 %.ko: prepare scripts FORCE
1677 $(cmd_crmodverdir)
1678 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1679 $(build)=$(build-dir) $(@:.ko=.o)
1680 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1682 # FIXME Should go into a make.lib or something
1683 # ===========================================================================
1685 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1686 cmd_rmdirs = rm -rf $(rm-dirs)
1688 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1689 cmd_rmfiles = rm -f $(rm-files)
1691 # Run depmod only if we have System.map and depmod is executable
1692 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1693 cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \
1694 $(KERNELRELEASE)
1696 # Create temporary dir for module support files
1697 # clean it up only when building all modules
1698 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1699 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1701 # read all saved command lines
1703 cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
1705 ifneq ($(cmd_files),)
1706 $(cmd_files): ; # Do not try to update included dependency files
1707 include $(cmd_files)
1708 endif
1710 endif # skip-makefile
1712 PHONY += FORCE
1713 FORCE:
1715 # Declare the contents of the PHONY variable as phony. We keep that
1716 # information in a variable so we can use it in if_changed and friends.
1717 .PHONY: $(PHONY)