5 NAME = Arr Matey! A Hairy Bilge Rat!
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
14 # o use make's built-in rules and variables
15 # (this increases performance and avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # Add custom flags here to avoid conflict with updates
20 EXTRAVERSION := $(EXTRAVERSION)-omap1
22 # We are using a recursive build, so we need to do a little thinking
23 # to get the ordering right.
25 # Most importantly: sub-Makefiles should only ever modify files in
26 # their own directory. If in some directory we have a dependency on
27 # a file in another dir (which doesn't happen often, but it's often
28 # unavoidable when linking the built-in.o targets which finally
29 # turn into vmlinux), we will call a sub make in that other dir, and
30 # after that we are sure that everything which is in that other dir
33 # The only cases where we need to modify files which have global
34 # effects are thus separated out and done before the recursive
35 # descending is started. They are now explicitly listed as the
38 # To put more focus on warnings, be less verbose as default
39 # Use 'make V=1' to see the full commands
42 ifeq ("$(origin V)", "command line")
50 # Call a source code checker (by default, "sparse") as part of the
53 # Use 'make C=1' to enable checking of only re-compiled files.
54 # Use 'make C=2' to enable checking of *all* source files, regardless
55 # of whether they are re-compiled or not.
57 # See the file "Documentation/sparse.txt" for more details, including
58 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
65 ifndef KBUILD_CHECKSRC
69 # Use make M=dir to specify directory of external module to build
70 # Old syntax make ... SUBDIRS=$PWD is still supported
71 # Setting the environment variable KBUILD_EXTMOD take precedence
73 KBUILD_EXTMOD ?= $(SUBDIRS)
76 ifeq ("$(origin M)", "command line")
82 # kbuild supports saving output files in a separate directory.
83 # To locate output files in a separate directory two syntaxes are supported.
84 # In both cases the working directory must be the root of the kernel src.
86 # Use "make O=dir/to/store/output/files/"
88 # 2) Set KBUILD_OUTPUT
89 # Set the environment variable KBUILD_OUTPUT to point to the directory
90 # where the output files shall be placed.
91 # export KBUILD_OUTPUT=dir/to/store/output/files/
94 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
98 # KBUILD_SRC is set on invocation of make in OBJ directory
99 # KBUILD_SRC is not intended to be used by the regular user (for now)
100 ifeq ($(KBUILD_SRC),)
102 # OK, Make called in directory where kernel src resides
103 # Do we want to locate output files in a separate directory?
105 ifeq ("$(origin O)", "command line")
106 KBUILD_OUTPUT := $(O)
110 # That's our default target when none is given on the command line
114 # Cancel implicit rules on top Makefile
115 $(CURDIR)/Makefile Makefile: ;
117 ifneq ($(KBUILD_OUTPUT),)
118 # Invoke a second make in the output directory, passing relevant variables
119 # check that the output directory actually exists
120 saved-output := $(KBUILD_OUTPUT)
121 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
122 $(if $(KBUILD_OUTPUT),, \
123 $(error output directory "$(saved-output)" does not exist))
125 PHONY += $(MAKECMDGOALS) sub-make
127 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
131 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
132 KBUILD_SRC=$(CURDIR) \
133 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
134 $(filter-out _all sub-make,$(MAKECMDGOALS))
136 # Leave processing to above invocation of make
138 endif # ifneq ($(KBUILD_OUTPUT),)
139 endif # ifeq ($(KBUILD_SRC),)
141 # We process the rest of the Makefile if this is the final invocation of make
142 ifeq ($(skip-makefile),)
144 # If building an external module we do not care about the all: rule
145 # but instead _all depend on modules
147 ifeq ($(KBUILD_EXTMOD),)
153 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
155 # FIXME - TOPDIR is obsolete, use srctree/objtree
160 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
162 export srctree objtree VPATH TOPDIR
165 # SUBARCH tells the usermode build what the underlying arch is. That is set
166 # first, and if a usermode build is happening, the "ARCH=um" on the command
167 # line overrides the setting of ARCH below. If a native build is happening,
168 # then ARCH is assigned, getting whatever value it gets normally, and
169 # SUBARCH is subsequently ignored.
171 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
172 -e s/arm.*/arm/ -e s/sa110/arm/ \
173 -e s/s390x/s390/ -e s/parisc64/parisc/ \
174 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
179 # Cross compiling and selecting different set of gcc/bin-utils
180 # ---------------------------------------------------------------------------
182 # When performing cross compilation for other architectures ARCH shall be set
183 # to the target architecture. (See arch/* for the possibilities).
184 # ARCH can be set during invocation of make:
186 # Another way is to have ARCH set in the environment.
187 # The default ARCH is the host where make is executed.
189 # CROSS_COMPILE specify the prefix used for all executables used
190 # during compilation. Only gcc and related bin-utils executables
191 # are prefixed with $(CROSS_COMPILE).
192 # CROSS_COMPILE can be set on the command line
193 # make CROSS_COMPILE=ia64-linux-
194 # Alternatively CROSS_COMPILE can be set in the environment.
195 # Default value for CROSS_COMPILE is not to prefix executables
196 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
199 CROSS_COMPILE ?= arm-linux-
201 # Architecture as present in compile.h
202 UTS_MACHINE := $(ARCH)
205 # Additional ARCH settings for x86
209 ifeq ($(ARCH),x86_64)
213 KCONFIG_CONFIG ?= .config
215 # SHELL used by kbuild
216 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
217 else if [ -x /bin/bash ]; then echo /bin/bash; \
218 else echo sh; fi ; fi)
222 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
225 # Decide whether to build built-in, modular, or both.
226 # Normally, just do built-in.
231 # If we have only "make modules", don't compile built-in objects.
232 # When we're building modules with modversions, we need to consider
233 # the built-in objects during the descend as well, in order to
234 # make sure the checksums are up to date before we record them.
236 ifeq ($(MAKECMDGOALS),modules)
237 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
240 # If we have "make <whatever> modules", compile modules
241 # in addition to whatever we do anyway.
242 # Just "make" or "make all" shall build modules as well
244 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
248 ifeq ($(MAKECMDGOALS),)
252 export KBUILD_MODULES KBUILD_BUILTIN
253 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
256 # ---------------------------------------------------------------------------
258 # Normally, we echo the whole command before executing it. By making
259 # that echo $($(quiet)$(cmd)), we now have the possibility to set
260 # $(quiet) to choose other forms of output instead, e.g.
262 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
263 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
265 # If $(quiet) is empty, the whole command will be printed.
266 # If it is set to "quiet_", only the short version will be printed.
267 # If it is set to "silent_", nothing will be printed at all, since
268 # the variable $(silent_cmd_cc_o_c) doesn't exist.
270 # A simple variant is to prefix commands with $(Q) - that's useful
271 # for commands that shall be hidden in non-verbose mode.
275 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
276 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
278 ifeq ($(KBUILD_VERBOSE),1)
286 # If the user is running make -s (silent mode), suppress echoing of
289 ifneq ($(findstring s,$(MAKEFLAGS)),)
293 export quiet Q KBUILD_VERBOSE
296 # Look for make include files relative to root of kernel src
297 MAKEFLAGS += --include-dir=$(srctree)
299 # We need some generic definitions (do not try to remake the file).
300 $(srctree)/scripts/Kbuild.include: ;
301 include $(srctree)/scripts/Kbuild.include
303 # Make variables (CC, etc...)
305 AS = $(CROSS_COMPILE)as
306 LD = $(CROSS_COMPILE)ld
307 CC = $(CROSS_COMPILE)gcc
309 AR = $(CROSS_COMPILE)ar
310 NM = $(CROSS_COMPILE)nm
311 STRIP = $(CROSS_COMPILE)strip
312 OBJCOPY = $(CROSS_COMPILE)objcopy
313 OBJDUMP = $(CROSS_COMPILE)objdump
315 GENKSYMS = scripts/genksyms/genksyms
316 DEPMOD = /sbin/depmod
317 KALLSYMS = scripts/kallsyms
321 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
323 CFLAGS_MODULE = $(MODFLAGS)
324 AFLAGS_MODULE = $(MODFLAGS)
330 # Use LINUXINCLUDE when you must reference the include/ directory.
331 # Needed to be compatible with the O= option
332 LINUXINCLUDE := -Iinclude \
333 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
334 -include include/linux/autoconf.h
336 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
338 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
339 -fno-strict-aliasing -fno-common \
340 -Werror-implicit-function-declaration
341 KBUILD_AFLAGS := -D__ASSEMBLY__
343 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
344 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
345 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
347 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
348 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
349 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
350 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
352 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
353 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
354 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
356 # When compiling out-of-tree modules, put MODVERDIR in the module
357 # tree rather than in the kernel tree. The kernel tree might
359 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
361 # Files to ignore in find ... statements
363 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
364 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
366 # ===========================================================================
367 # Rules shared between *config targets and build targets
369 # Basic helpers built in scripts/
370 PHONY += scripts_basic
372 $(Q)$(MAKE) $(build)=scripts/basic
374 # To avoid any implicit rule to kick in, define an empty command.
375 scripts/basic/%: scripts_basic ;
377 PHONY += outputmakefile
378 # outputmakefile generates a Makefile in the output directory, if using a
379 # separate output directory. This allows convenient use of make in the
382 ifneq ($(KBUILD_SRC),)
383 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
384 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
387 # To make sure we do not include .config for any of the *config targets
388 # catch them early, and hand them over to scripts/kconfig/Makefile
389 # It is allowed to specify more targets when calling make, including
390 # mixing *config targets and build targets.
391 # For example 'make oldconfig all'.
392 # Detect when mixed targets is specified, and make a second invocation
393 # of make so .config is not included in this case either (for *config).
395 no-dot-config-targets := clean mrproper distclean \
396 cscope TAGS tags help %docs check% \
397 include/linux/version.h headers_% \
398 kernelrelease kernelversion
404 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
405 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
410 ifeq ($(KBUILD_EXTMOD),)
411 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
413 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
419 ifeq ($(mixed-targets),1)
420 # ===========================================================================
421 # We're called with mixed targets (*config and build targets).
422 # Handle them one by one.
425 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
428 ifeq ($(config-targets),1)
429 # ===========================================================================
430 # *config targets only - make sure prerequisites are updated, and descend
431 # in scripts/kconfig to make the *config target
433 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
434 # KBUILD_DEFCONFIG may point out an alternative default configuration
435 # used for 'make defconfig'
436 include $(srctree)/arch/$(SRCARCH)/Makefile
437 export KBUILD_DEFCONFIG
439 config %config: scripts_basic outputmakefile FORCE
440 $(Q)mkdir -p include/linux include/config
441 $(Q)$(MAKE) $(build)=scripts/kconfig $@
444 # ===========================================================================
445 # Build targets only - this includes vmlinux, arch specific targets, clean
446 # targets and others. In general all targets except *config targets.
448 ifeq ($(KBUILD_EXTMOD),)
449 # Additional helpers built in scripts/
450 # Carefully list dependencies so we do not try to build scripts twice
453 scripts: scripts_basic include/config/auto.conf
454 $(Q)$(MAKE) $(build)=$(@)
456 # Objects we will link into vmlinux / subdirs we need to visit
458 drivers-y := drivers/ sound/
462 endif # KBUILD_EXTMOD
464 ifeq ($(dot-config),1)
466 -include include/config/auto.conf
468 ifeq ($(KBUILD_EXTMOD),)
469 # Read in dependencies to all Kconfig* files, make sure to run
470 # oldconfig if changes are detected.
471 -include include/config/auto.conf.cmd
473 # To avoid any implicit rule to kick in, define an empty command
474 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
476 # If .config is newer than include/config/auto.conf, someone tinkered
477 # with it and forgot to run make oldconfig.
478 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
479 # we execute the config step to be sure to catch updated Kconfig files
480 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
481 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
483 # external modules needs include/linux/autoconf.h and include/config/auto.conf
484 # but do not care if they are up-to-date. Use auto.conf to trigger the test
485 PHONY += include/config/auto.conf
487 include/config/auto.conf:
488 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
490 echo " ERROR: Kernel configuration is invalid."; \
491 echo " include/linux/autoconf.h or $@ are missing."; \
492 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
496 endif # KBUILD_EXTMOD
499 # Dummy target needed, because used as prerequisite
500 include/config/auto.conf: ;
501 endif # $(dot-config)
503 # The all: target is the default when no target is given on the
505 # This allow a user to issue only 'make' to build a kernel including modules
506 # Defaults vmlinux but it is usually overridden in the arch makefile
509 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
515 include $(srctree)/arch/$(SRCARCH)/Makefile
517 ifdef CONFIG_FRAME_POINTER
518 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
520 KBUILD_CFLAGS += -fomit-frame-pointer
523 ifdef CONFIG_DEBUG_INFO
525 KBUILD_AFLAGS += -gdwarf-2
528 # We trigger additional mismatches with less inlining
529 ifdef CONFIG_DEBUG_SECTION_MISMATCH
530 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
533 # Force gcc to behave correct even for buggy distributions
534 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
536 # arch Makefile may override CC so keep this after arch Makefile is included
537 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
538 CHECKFLAGS += $(NOSTDINC_FLAGS)
540 # warn about C99 declaration after statement
541 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
543 # disable pointer signed / unsigned warnings in gcc 4.0
544 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
546 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
547 # But warn user when we do so
549 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
551 ifneq ($(KCPPFLAGS),)
552 $(call warn-assign,CPPFLAGS)
553 KBUILD_CPPFLAGS += $(KCPPFLAGS)
556 $(call warn-assign,AFLAGS)
557 KBUILD_AFLAGS += $(KAFLAGS)
560 $(call warn-assign,CFLAGS)
561 KBUILD_CFLAGS += $(KCFLAGS)
564 # Use --build-id when available.
565 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
566 $(call ld-option, -Wl$(comma)--build-id,))
567 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
568 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
570 # Default kernel image to build when no specific target is given.
571 # KBUILD_IMAGE may be overruled on the command line or
572 # set in the environment
573 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
575 export KBUILD_IMAGE ?= vmlinux
578 # INSTALL_PATH specifies where to place the updated kernel and system map
579 # images. Default is /boot, but you can set it to other values
580 export INSTALL_PATH ?= /boot
583 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
584 # relocations required by build roots. This is not defined in the
585 # makefile but the argument can be passed to make if needed.
588 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
592 # INSTALL_MOD_STRIP, if defined, will cause modules to be
593 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
594 # the default option --strip-debug will be used. Otherwise,
595 # INSTALL_MOD_STRIP will used as the options to the strip command.
597 ifdef INSTALL_MOD_STRIP
598 ifeq ($(INSTALL_MOD_STRIP),1)
599 mod_strip_cmd = $(STRIP) --strip-debug
601 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
602 endif # INSTALL_MOD_STRIP=1
605 endif # INSTALL_MOD_STRIP
609 ifeq ($(KBUILD_EXTMOD),)
610 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
612 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
613 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
614 $(net-y) $(net-m) $(libs-y) $(libs-m)))
616 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
618 $(core-n) $(core-) $(drivers-n) $(drivers-) \
619 $(net-n) $(net-) $(libs-n) $(libs-))))
621 init-y := $(patsubst %/, %/built-in.o, $(init-y))
622 core-y := $(patsubst %/, %/built-in.o, $(core-y))
623 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
624 net-y := $(patsubst %/, %/built-in.o, $(net-y))
625 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
626 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
627 libs-y := $(libs-y1) $(libs-y2)
630 # ---------------------------------------------------------------------------
631 # vmlinux is built from the objects selected by $(vmlinux-init) and
632 # $(vmlinux-main). Most are built-in.o files from top-level directories
633 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
634 # Ordering when linking is important, and $(vmlinux-init) must be first.
639 # +-< $(vmlinux-init)
640 # | +--< init/version.o + more
642 # +--< $(vmlinux-main)
643 # | +--< driver/built-in.o mm/built-in.o + more
645 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
647 # vmlinux version (uname -v) cannot be updated during normal
648 # descending-into-subdirs phase since we do not yet know if we need to
650 # Therefore this step is delayed until just before final link of vmlinux -
651 # except in the kallsyms case where it is done just before adding the
652 # symbols to the kernel.
654 # System.map is generated to document addresses of all kernel symbols
656 vmlinux-init := $(head-y) $(init-y)
657 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
658 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
659 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
660 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
662 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
663 # May be overridden by arch/$(ARCH)/Makefile
664 quiet_cmd_vmlinux__ ?= LD $@
665 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
666 -T $(vmlinux-lds) $(vmlinux-init) \
667 --start-group $(vmlinux-main) --end-group \
668 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
670 # Generate new vmlinux version
671 quiet_cmd_vmlinux_version = GEN .version
672 cmd_vmlinux_version = set -e; \
673 if [ ! -r .version ]; then \
677 mv .version .old_version; \
678 expr 0$$(cat .old_version) + 1 >.version; \
680 $(MAKE) $(build)=init
682 # Generate System.map
683 quiet_cmd_sysmap = SYSMAP
684 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
687 # If CONFIG_KALLSYMS is set .version is already updated
688 # Generate System.map and verify that the content is consistent
689 # Use + in front of the vmlinux_version rule to silent warning with make -j2
690 # First command is ':' to allow us to use + in front of the rule
691 define rule_vmlinux__
693 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
695 $(call cmd,vmlinux__)
696 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
698 $(Q)$(if $($(quiet)cmd_sysmap), \
699 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
700 $(cmd_sysmap) $@ System.map; \
701 if [ $$? -ne 0 ]; then \
709 ifdef CONFIG_KALLSYMS
710 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
711 # It's a three stage process:
712 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
714 # Running kallsyms on that gives us .tmp_kallsyms1.o with
715 # the right size - vmlinux version (uname -v) is updated during this step
716 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
717 # but due to the added section, some addresses have shifted.
718 # From here, we generate a correct .tmp_kallsyms2.o
719 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
720 # o Verify that the System.map from vmlinux matches the map from
721 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
722 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
723 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
724 # temporary bypass to allow the kernel to be built while the
725 # maintainers work out what went wrong with kallsyms.
727 ifdef CONFIG_KALLSYMS_EXTRA_PASS
733 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
735 define verify_kallsyms
736 $(Q)$(if $($(quiet)cmd_sysmap), \
737 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
738 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
739 $(Q)cmp -s System.map .tmp_System.map || \
740 (echo Inconsistent kallsyms data; \
741 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
742 rm .tmp_kallsyms* ; /bin/false )
745 # Update vmlinux version before link
746 # Use + in front of this rule to silent warning about make -j1
747 # First command is ':' to allow us to use + in front of this rule
748 cmd_ksym_ld = $(cmd_vmlinux__)
751 +$(call cmd,vmlinux_version)
752 $(call cmd,vmlinux__)
753 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
756 # Generate .S file with all kernel symbols
757 quiet_cmd_kallsyms = KSYM $@
758 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
759 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
761 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
762 $(call if_changed_dep,as_o_S)
764 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
767 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
768 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
769 $(call if_changed_rule,ksym_ld)
771 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
772 $(call if_changed,vmlinux__)
774 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
775 $(call if_changed,vmlinux__)
777 # Needs to visit scripts/ before $(KALLSYMS) can be used.
778 $(KALLSYMS): scripts ;
780 # Generate some data for debugging strange kallsyms problems
781 debug_kallsyms: .tmp_map$(last_kallsyms)
783 .tmp_map%: .tmp_vmlinux% FORCE
784 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
790 endif # ifdef CONFIG_KALLSYMS
792 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
793 # relevant sections renamed as per the linker script.
794 quiet_cmd_vmlinux-modpost = LD $@
795 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
796 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
797 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
798 define rule_vmlinux-modpost
800 +$(call cmd,vmlinux-modpost)
801 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
802 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
805 # vmlinux image - including updated kernel symbols
806 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
807 ifdef CONFIG_HEADERS_CHECK
808 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
811 $(Q)$(MAKE) $(build)=samples
813 $(call vmlinux-modpost)
814 $(call if_changed_rule,vmlinux__)
815 $(Q)rm -f .old_version
817 # build vmlinux.o first to catch section mismatch errors early
818 $(kallsyms.o): vmlinux.o
819 vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE
820 $(call if_changed_rule,vmlinux-modpost)
822 # The actual objects are generated when descending,
823 # make sure no implicit rule kicks in
824 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
826 # Handle descending into subdirectories listed in $(vmlinux-dirs)
827 # Preset locale variables to speed up the build process. Limit locale
828 # tweaks to this spot to avoid wrong language settings when running
829 # make menuconfig etc.
830 # Error messages still appears in the original language
832 PHONY += $(vmlinux-dirs)
833 $(vmlinux-dirs): prepare scripts
834 $(Q)$(MAKE) $(build)=$@
836 # Build the kernel release string
838 # The KERNELRELEASE value built here is stored in the file
839 # include/config/kernel.release, and is used when executing several
840 # make targets, such as "make install" or "make modules_install."
842 # The eventual kernel release string consists of the following fields,
843 # shown in a hierarchical format to show how smaller parts are concatenated
844 # to form the larger and final value, with values coming from places like
845 # the Makefile, kernel config options, make command line options and/or
846 # SCM tag information.
850 # $(PATCHLEVEL) eg, 6
852 # $(EXTRAVERSION) eg, -rc6
855 # localversion* (files without backups, containing '~')
856 # $(CONFIG_LOCALVERSION) (from kernel config setting)
857 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
858 # ./scripts/setlocalversion (SCM tag, if one exists)
859 # $(LOCALVERSION) (from make command line if provided)
861 # Note how the final $(localver-auto) string is included *only* if the
862 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
863 # moment, only git is supported but other SCMs can edit the script
864 # scripts/setlocalversion and add the appropriate checks as needed.
866 pattern = ".*/localversion[^~]*"
867 string = $(shell cat /dev/null \
868 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
870 localver = $(subst $(space),, $(string) \
871 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
873 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
874 # and if the SCM is know a tag from the SCM is appended.
875 # The appended tag is determined by the SCM used.
877 # Currently, only git is supported.
878 # Other SCMs can edit scripts/setlocalversion and add the appropriate
880 ifdef CONFIG_LOCALVERSION_AUTO
881 _localver-auto = $(shell $(CONFIG_SHELL) \
882 $(srctree)/scripts/setlocalversion $(srctree))
883 localver-auto = $(LOCALVERSION)$(_localver-auto)
886 localver-full = $(localver)$(localver-auto)
888 # Store (new) KERNELRELASE string in include/config/kernel.release
889 kernelrelease = $(KERNELVERSION)$(localver-full)
890 include/config/kernel.release: include/config/auto.conf FORCE
892 $(Q)echo $(kernelrelease) > $@
895 # Things we need to do before we recursively start building the kernel
896 # or the modules are listed in "prepare".
897 # A multi level approach is used. prepareN is processed before prepareN-1.
898 # archprepare is used in arch Makefiles and when processed asm symlink,
899 # version.h and scripts_basic is processed / created.
901 # Listed in dependency order
902 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
904 # prepare3 is used to check if we are building in a separate output directory,
906 # 1) Check that make has not been executed in the kernel src $(srctree)
907 # 2) Create the include2 directory, used for the second asm symlink
908 prepare3: include/config/kernel.release
909 ifneq ($(KBUILD_SRC),)
910 @echo ' Using $(srctree) as source for kernel'
911 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
912 echo " $(srctree) is not clean, please run 'make mrproper'";\
913 echo " in the '$(srctree)' directory.";\
916 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
917 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
920 # prepare2 creates a makefile if using a separate output directory
921 prepare2: prepare3 outputmakefile
923 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
924 include/asm include/config/auto.conf
927 archprepare: prepare1 scripts_basic
929 prepare0: archprepare FORCE
930 $(Q)$(MAKE) $(build)=.
931 $(Q)$(MAKE) $(build)=. missing-syscalls
933 # All the preparing..
936 # Leave this as default for preprocessing vmlinux.lds.S, which is now
937 # done in arch/$(ARCH)/kernel/Makefile
939 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
941 # The asm symlink changes when $(ARCH) changes.
942 # Detect this and ask user to run make mrproper
945 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
946 if [ -L include/asm ]; then \
947 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
948 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
949 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
953 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
954 if [ ! -d include ]; then \
957 ln -fsn asm-$(SRCARCH) $@; \
960 # Generate some files
961 # ---------------------------------------------------------------------------
963 # KERNELRELEASE can change from a few different places, meaning version.h
964 # needs to be updated, so this check is forced on all builds
967 define filechk_utsrelease.h
968 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
969 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
972 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
975 define filechk_version.h
976 (echo \#define LINUX_VERSION_CODE $(shell \
977 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
978 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
981 include/linux/version.h: $(srctree)/Makefile FORCE
982 $(call filechk,version.h)
984 include/linux/utsrelease.h: include/config/kernel.release FORCE
985 $(call filechk,utsrelease.h)
987 # ---------------------------------------------------------------------------
991 @echo '*** Warning: make $@ is unnecessary now.'
993 # ---------------------------------------------------------------------------
995 INSTALL_HDR_PATH=$(objtree)/usr
996 export INSTALL_HDR_PATH
998 HDRFILTER=generic i386 x86_64
999 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
1001 PHONY += headers_install_all
1002 headers_install_all: include/linux/version.h scripts_basic FORCE
1003 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1004 $(Q)for arch in $(HDRARCHES); do \
1005 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
1008 PHONY += headers_install
1009 headers_install: include/linux/version.h scripts_basic FORCE
1010 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1011 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1013 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1014 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1016 PHONY += headers_check_all
1017 headers_check_all: headers_install_all
1018 $(Q)for arch in $(HDRARCHES); do \
1019 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1022 PHONY += headers_check
1023 headers_check: headers_install
1024 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1026 # ---------------------------------------------------------------------------
1029 ifdef CONFIG_MODULES
1031 # By default, build modules as well
1037 # A module can be listed more than once in obj-m resulting in
1038 # duplicate lines in modules.order files. Those are removed
1039 # using awk while concatenating to the final file.
1042 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1043 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1044 @echo ' Building modules, stage 2.';
1045 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1048 # Target to prepare building external modules
1049 PHONY += modules_prepare
1050 modules_prepare: prepare scripts
1052 # Target to install modules
1053 PHONY += modules_install
1054 modules_install: _modinst_ _modinst_post
1058 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1059 echo "Warning: you may need to install module-init-tools"; \
1060 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1063 @rm -rf $(MODLIB)/kernel
1064 @rm -f $(MODLIB)/source
1065 @mkdir -p $(MODLIB)/kernel
1066 @ln -s $(srctree) $(MODLIB)/source
1067 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1068 rm -f $(MODLIB)/build ; \
1069 ln -s $(objtree) $(MODLIB)/build ; \
1071 @cp -f $(objtree)/modules.order $(MODLIB)/
1072 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1074 # This depmod is only for convenience to give the initial
1075 # boot a modules.dep even before / is mounted read-write. However the
1076 # boot script depmod is the master version.
1077 PHONY += _modinst_post
1078 _modinst_post: _modinst_
1081 else # CONFIG_MODULES
1083 # Modules not configured
1084 # ---------------------------------------------------------------------------
1086 modules modules_install: FORCE
1088 @echo "The present kernel configuration has modules disabled."
1089 @echo "Type 'make config' and enable loadable module support."
1090 @echo "Then build a kernel with module support enabled."
1094 endif # CONFIG_MODULES
1097 # Cleaning is done on three levels.
1098 # make clean Delete most generated files
1099 # Leave enough to build external modules
1100 # make mrproper Delete the current configuration, and all generated files
1101 # make distclean Remove editor backup files, patch leftover files and the like
1103 # Directories & files removed with 'make clean'
1104 CLEAN_DIRS += $(MODVERDIR)
1105 CLEAN_FILES += vmlinux System.map \
1106 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1108 # Directories & files removed with 'make mrproper'
1109 MRPROPER_DIRS += include/config include2 usr/include
1110 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1111 include/linux/autoconf.h include/linux/version.h \
1112 include/linux/utsrelease.h \
1113 Module.symvers tags TAGS cscope*
1115 # clean - Delete most, but leave enough to build external modules
1117 clean: rm-dirs := $(CLEAN_DIRS)
1118 clean: rm-files := $(CLEAN_FILES)
1119 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1121 PHONY += $(clean-dirs) clean archclean
1123 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1125 clean: archclean $(clean-dirs)
1128 @find . $(RCS_FIND_IGNORE) \
1129 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1130 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1131 -o -name '*.symtypes' -o -name 'modules.order' \) \
1132 -type f -print | xargs rm -f
1134 # mrproper - Delete all generated files, including .config
1136 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1137 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1138 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1140 PHONY += $(mrproper-dirs) mrproper archmrproper
1142 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1144 mrproper: clean archmrproper $(mrproper-dirs)
1153 @find $(srctree) $(RCS_FIND_IGNORE) \
1154 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1155 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1156 -o -name '.*.rej' -o -size 0 \
1157 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1158 -type f -print | xargs rm -f
1161 # Packaging of the kernel to various formats
1162 # ---------------------------------------------------------------------------
1163 # rpm target kept for backward compatibility
1164 package-dir := $(srctree)/scripts/package
1166 %pkg: include/config/kernel.release FORCE
1167 $(Q)$(MAKE) $(build)=$(package-dir) $@
1168 rpm: include/config/kernel.release FORCE
1169 $(Q)$(MAKE) $(build)=$(package-dir) $@
1172 # Brief documentation of the typical targets used
1173 # ---------------------------------------------------------------------------
1175 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1176 boards := $(notdir $(boards))
1179 @echo 'Cleaning targets:'
1180 @echo ' clean - Remove most generated files but keep the config and'
1181 @echo ' enough build support to build external modules'
1182 @echo ' mrproper - Remove all generated files + config + various backup files'
1183 @echo ' distclean - mrproper + remove editor backup and patch files'
1185 @echo 'Configuration targets:'
1186 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1188 @echo 'Other generic targets:'
1189 @echo ' all - Build all targets marked with [*]'
1190 @echo '* vmlinux - Build the bare kernel'
1191 @echo '* modules - Build all modules'
1192 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1193 @echo ' dir/ - Build all files in dir and below'
1194 @echo ' dir/file.[ois] - Build specified target only'
1195 @echo ' dir/file.ko - Build module including final link'
1196 @echo ' prepare - Set up for building external modules'
1197 @echo ' tags/TAGS - Generate tags file for editors'
1198 @echo ' cscope - Generate cscope index'
1199 @echo ' kernelrelease - Output the release version string'
1200 @echo ' kernelversion - Output the version stored in Makefile'
1201 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1202 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1203 echo ' (default: $(INSTALL_HDR_PATH))'; \
1206 @echo 'Static analysers'
1207 @echo ' checkstack - Generate a list of stack hogs'
1208 @echo ' namespacecheck - Name space analysis on compiled kernel'
1209 @echo ' versioncheck - Sanity check on version.h usage'
1210 @echo ' includecheck - Check for duplicate included header files'
1211 @echo ' export_report - List the usages of all exported symbols'
1212 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1213 echo ' headers_check - Sanity check on exported headers'; \
1216 @echo 'Kernel packaging:'
1217 @$(MAKE) $(build)=$(package-dir) help
1219 @echo 'Documentation targets:'
1220 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1222 @echo 'Architecture specific targets ($(ARCH)):'
1223 @$(if $(archhelp),$(archhelp),\
1224 echo ' No architecture specific help defined for $(ARCH)')
1227 $(foreach b, $(boards), \
1228 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1231 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1232 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1233 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1234 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1235 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1237 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1238 @echo 'For further info see the ./README file'
1241 # Documentation targets
1242 # ---------------------------------------------------------------------------
1243 %docs: scripts_basic FORCE
1244 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1246 else # KBUILD_EXTMOD
1249 # External module support.
1250 # When building external modules the kernel used as basis is considered
1251 # read-only, and no consistency checks are made and the make
1252 # system is not used on the basis kernel. If updates are required
1253 # in the basis kernel ordinary make commands (without M=...) must
1256 # The following are the only valid targets when building external
1258 # make M=dir clean Delete all automatically generated files
1259 # make M=dir modules Make all modules in specified dir
1260 # make M=dir Same as 'make M=dir modules'
1261 # make M=dir modules_install
1262 # Install the modules built in the module directory
1263 # Assumes install directory is already created
1265 # We are always building modules
1267 PHONY += crmodverdir
1271 PHONY += $(objtree)/Module.symvers
1272 $(objtree)/Module.symvers:
1273 @test -e $(objtree)/Module.symvers || ( \
1275 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1276 echo " is missing; modules will have no dependencies and modversions."; \
1279 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1280 PHONY += $(module-dirs) modules
1281 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1282 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1284 modules: $(module-dirs)
1285 @echo ' Building modules, stage 2.';
1286 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1288 PHONY += modules_install
1289 modules_install: _emodinst_ _emodinst_post
1291 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1294 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1295 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1297 PHONY += _emodinst_post
1298 _emodinst_post: _emodinst_
1301 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1303 PHONY += $(clean-dirs) clean
1305 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1307 clean: rm-dirs := $(MODVERDIR)
1308 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1309 clean: $(clean-dirs)
1312 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1313 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1314 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1315 -type f -print | xargs rm -f
1318 @echo ' Building external modules.'
1319 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1321 @echo ' modules - default target, build the module(s)'
1322 @echo ' modules_install - install the module'
1323 @echo ' clean - remove generated files in module directory only'
1327 PHONY += prepare scripts
1330 endif # KBUILD_EXTMOD
1332 # Generate tags for editors
1333 # ---------------------------------------------------------------------------
1335 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1336 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1337 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1339 ifeq ($(src),$(obj))
1342 __srctree = $(srctree)/
1345 ifeq ($(ALLSOURCE_ARCHS),)
1347 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1349 ALLINCLUDE_ARCHS := $(SRCARCH)
1352 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1353 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1356 ALLSOURCE_ARCHS := $(SRCARCH)
1359 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1360 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1363 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1365 find $(__srctree)include $(RCS_FIND_IGNORE) \
1366 \( -name config -o -name 'asm-*' \) -prune \
1367 -o -name $1 -print; \
1368 for arch in $(ALLINCLUDE_ARCHS) ; do \
1369 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1372 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1374 find $(__srctree) $(RCS_FIND_IGNORE) \
1375 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1381 $(call find-sources,'*.[chS]')
1384 $(call find-sources,'Kconfig*')
1386 define all-defconfigs
1387 $(call find-sources,'defconfig')
1391 if $1 --version 2>&1 | grep -iq exuberant; then \
1392 $(all-sources) | xargs $1 -a \
1393 -I __initdata,__exitdata,__acquires,__releases \
1394 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1395 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1396 --extra=+f --c-kinds=+px \
1397 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1398 $(all-kconfigs) | xargs $1 -a \
1400 --language-force=kconfig \
1401 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1402 $(all-defconfigs) | xargs -r $1 -a \
1403 --langdef=dotconfig \
1404 --language-force=dotconfig \
1405 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1406 elif $1 --version 2>&1 | grep -iq emacs; then \
1407 $(all-sources) | xargs $1 -a; \
1408 $(all-kconfigs) | xargs $1 -a \
1409 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1410 $(all-defconfigs) | xargs -r $1 -a \
1411 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1413 $(all-sources) | xargs $1 -a; \
1417 quiet_cmd_cscope-file = FILELST cscope.files
1418 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1420 quiet_cmd_cscope = MAKE cscope.out
1421 cmd_cscope = cscope -b
1424 $(call cmd,cscope-file)
1427 quiet_cmd_TAGS = MAKE $@
1436 quiet_cmd_tags = MAKE $@
1446 # Scripts to check various things for consistency
1447 # ---------------------------------------------------------------------------
1450 find * $(RCS_FIND_IGNORE) \
1451 -name '*.[hcS]' -type f -print | sort \
1452 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1455 find * $(RCS_FIND_IGNORE) \
1456 -name '*.[hcS]' -type f -print | sort \
1457 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1460 $(PERL) $(srctree)/scripts/namespace.pl
1463 $(PERL) $(srctree)/scripts/export_report.pl
1465 endif #ifeq ($(config-targets),1)
1466 endif #ifeq ($(mixed-targets),1)
1468 PHONY += checkstack kernelrelease kernelversion
1470 # UML needs a little special treatment here. It wants to use the host
1471 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1472 # else wants $(ARCH), including people doing cross-builds, which means
1473 # that $(SUBARCH) doesn't work here.
1475 CHECKSTACK_ARCH := $(SUBARCH)
1477 CHECKSTACK_ARCH := $(ARCH)
1480 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1481 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1484 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1485 $(error kernelrelease not valid - run 'make prepare' to update it))
1487 @echo $(KERNELVERSION)
1490 # ---------------------------------------------------------------------------
1491 # Single targets are compatible with:
1492 # - build with mixed source and output
1493 # - build with separate output dir 'make O=...'
1494 # - external modules
1496 # target-dir => where to store outputfile
1497 # build-dir => directory in kernel source tree to use
1499 ifeq ($(KBUILD_EXTMOD),)
1500 build-dir = $(patsubst %/,%,$(dir $@))
1501 target-dir = $(dir $@)
1503 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1504 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1505 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1508 %.s: %.c prepare scripts FORCE
1509 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1510 %.i: %.c prepare scripts FORCE
1511 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1512 %.o: %.c prepare scripts FORCE
1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1514 %.lst: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516 %.s: %.S prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518 %.o: %.S prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520 %.symtypes: %.c prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1524 / %/: prepare scripts FORCE
1526 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1527 $(build)=$(build-dir)
1528 %.ko: prepare scripts FORCE
1530 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1531 $(build)=$(build-dir) $(@:.ko=.o)
1532 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1534 # FIXME Should go into a make.lib or something
1535 # ===========================================================================
1537 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1538 cmd_rmdirs = rm -rf $(rm-dirs)
1540 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1541 cmd_rmfiles = rm -f $(rm-files)
1543 # Run depmod only is we have System.map and depmod is executable
1544 # and we build for the host arch
1545 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1547 if [ -r System.map -a -x $(DEPMOD) ]; then \
1548 $(DEPMOD) -ae -F System.map \
1549 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1553 # Create temporary dir for module support files
1554 # clean it up only when building all modules
1555 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1556 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1558 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1559 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1560 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1562 quiet_cmd_as_o_S = AS $@
1563 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1565 # read all saved command lines
1567 targets := $(wildcard $(sort $(targets)))
1568 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1570 ifneq ($(cmd_files),)
1571 $(cmd_files): ; # Do not try to update included dependency files
1572 include $(cmd_files)
1575 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1577 # $(Q)$(MAKE) $(clean)=dir
1578 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1580 endif # skip-makefile
1585 # Declare the contents of the .PHONY variable as phony. We keep that
1586 # information in a variable se we can use it in if_changed and friends.