v2.6.22.24-op1
[linux-2.6.22.y-op.git] / Makefile
blob2a69b9bb5ea26ea94003b055fc1e94f23bf9fd86
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 22
4 EXTRAVERSION = .24-op1
5 NAME = Holy Dancing Manatees, Batman!
7 # *DOCUMENTATION*
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.
13 # Do not:
14 # o use make's built-in rules and variables
15 # (this increases performance and avoid hard-to-debug behavour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
28 # is now up to date.
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
33 # prepare rule.
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
38 ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42 endif
43 ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45 endif
47 # Call a source code checker (by default, "sparse") as part of the
48 # C compilation.
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
57 ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61 endif
62 ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64 endif
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
69 ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71 endif
72 ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76 endif
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
82 # 1) O=
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
89 # make
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # variable.
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
97 ifeq ($(KBUILD_SRC),)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
101 ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105 endif
107 # That's our default target when none is given on the command line
108 PHONY := _all
109 _all:
111 ifneq ($(KBUILD_OUTPUT),)
112 # Invoke a second make in the output directory, passing relevant variables
113 # check that the output directory actually exists
114 saved-output := $(KBUILD_OUTPUT)
115 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
116 $(if $(KBUILD_OUTPUT),, \
117 $(error output directory "$(saved-output)" does not exist))
119 PHONY += $(MAKECMDGOALS)
121 $(filter-out _all,$(MAKECMDGOALS)) _all:
122 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
123 KBUILD_SRC=$(CURDIR) \
124 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
126 # Leave processing to above invocation of make
127 skip-makefile := 1
128 endif # ifneq ($(KBUILD_OUTPUT),)
129 endif # ifeq ($(KBUILD_SRC),)
131 # We process the rest of the Makefile if this is the final invocation of make
132 ifeq ($(skip-makefile),)
134 # If building an external module we do not care about the all: rule
135 # but instead _all depend on modules
136 PHONY += all
137 ifeq ($(KBUILD_EXTMOD),)
138 _all: all
139 else
140 _all: modules
141 endif
143 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
144 TOPDIR := $(srctree)
145 # FIXME - TOPDIR is obsolete, use srctree/objtree
146 objtree := $(CURDIR)
147 src := $(srctree)
148 obj := $(objtree)
150 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
152 export srctree objtree VPATH TOPDIR
155 # SUBARCH tells the usermode build what the underlying arch is. That is set
156 # first, and if a usermode build is happening, the "ARCH=um" on the command
157 # line overrides the setting of ARCH below. If a native build is happening,
158 # then ARCH is assigned, getting whatever value it gets normally, and
159 # SUBARCH is subsequently ignored.
161 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
162 -e s/arm.*/arm/ -e s/sa110/arm/ \
163 -e s/s390x/s390/ -e s/parisc64/parisc/ \
164 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
166 # Cross compiling and selecting different set of gcc/bin-utils
167 # ---------------------------------------------------------------------------
169 # When performing cross compilation for other architectures ARCH shall be set
170 # to the target architecture. (See arch/* for the possibilities).
171 # ARCH can be set during invocation of make:
172 # make ARCH=ia64
173 # Another way is to have ARCH set in the environment.
174 # The default ARCH is the host where make is executed.
176 # CROSS_COMPILE specify the prefix used for all executables used
177 # during compilation. Only gcc and related bin-utils executables
178 # are prefixed with $(CROSS_COMPILE).
179 # CROSS_COMPILE can be set on the command line
180 # make CROSS_COMPILE=ia64-linux-
181 # Alternatively CROSS_COMPILE can be set in the environment.
182 # Default value for CROSS_COMPILE is not to prefix executables
183 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
185 ARCH ?= $(SUBARCH)
186 CROSS_COMPILE ?=
188 # Architecture as present in compile.h
189 UTS_MACHINE := $(ARCH)
191 KCONFIG_CONFIG ?= .config
193 # SHELL used by kbuild
194 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
195 else if [ -x /bin/bash ]; then echo /bin/bash; \
196 else echo sh; fi ; fi)
198 HOSTCC = gcc
199 HOSTCXX = g++
200 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
201 HOSTCXXFLAGS = -O2
203 # Decide whether to build built-in, modular, or both.
204 # Normally, just do built-in.
206 KBUILD_MODULES :=
207 KBUILD_BUILTIN := 1
209 # If we have only "make modules", don't compile built-in objects.
210 # When we're building modules with modversions, we need to consider
211 # the built-in objects during the descend as well, in order to
212 # make sure the checksums are up to date before we record them.
214 ifeq ($(MAKECMDGOALS),modules)
215 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
216 endif
218 # If we have "make <whatever> modules", compile modules
219 # in addition to whatever we do anyway.
220 # Just "make" or "make all" shall build modules as well
222 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
223 KBUILD_MODULES := 1
224 endif
226 ifeq ($(MAKECMDGOALS),)
227 KBUILD_MODULES := 1
228 endif
230 export KBUILD_MODULES KBUILD_BUILTIN
231 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
233 # Beautify output
234 # ---------------------------------------------------------------------------
236 # Normally, we echo the whole command before executing it. By making
237 # that echo $($(quiet)$(cmd)), we now have the possibility to set
238 # $(quiet) to choose other forms of output instead, e.g.
240 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
241 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
243 # If $(quiet) is empty, the whole command will be printed.
244 # If it is set to "quiet_", only the short version will be printed.
245 # If it is set to "silent_", nothing will be printed at all, since
246 # the variable $(silent_cmd_cc_o_c) doesn't exist.
248 # A simple variant is to prefix commands with $(Q) - that's useful
249 # for commands that shall be hidden in non-verbose mode.
251 # $(Q)ln $@ :<
253 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
254 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
256 ifeq ($(KBUILD_VERBOSE),1)
257 quiet =
259 else
260 quiet=quiet_
261 Q = @
262 endif
264 # If the user is running make -s (silent mode), suppress echoing of
265 # commands
267 ifneq ($(findstring s,$(MAKEFLAGS)),)
268 quiet=silent_
269 endif
271 export quiet Q KBUILD_VERBOSE
274 # Look for make include files relative to root of kernel src
275 MAKEFLAGS += --include-dir=$(srctree)
277 # We need some generic definitions.
278 include $(srctree)/scripts/Kbuild.include
280 # Make variables (CC, etc...)
282 AS = $(CROSS_COMPILE)as
283 LD = $(CROSS_COMPILE)ld
284 CC = $(CROSS_COMPILE)gcc
285 CPP = $(CC) -E
286 AR = $(CROSS_COMPILE)ar
287 NM = $(CROSS_COMPILE)nm
288 STRIP = $(CROSS_COMPILE)strip
289 OBJCOPY = $(CROSS_COMPILE)objcopy
290 OBJDUMP = $(CROSS_COMPILE)objdump
291 AWK = awk
292 GENKSYMS = scripts/genksyms/genksyms
293 DEPMOD = /sbin/depmod
294 KALLSYMS = scripts/kallsyms
295 PERL = perl
296 CHECK = sparse
298 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
299 MODFLAGS = -DMODULE
300 CFLAGS_MODULE = $(MODFLAGS)
301 AFLAGS_MODULE = $(MODFLAGS)
302 LDFLAGS_MODULE = -r
303 CFLAGS_KERNEL =
304 AFLAGS_KERNEL =
307 # Use LINUXINCLUDE when you must reference the include/ directory.
308 # Needed to be compatible with the O= option
309 LINUXINCLUDE := -Iinclude \
310 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
311 -include include/linux/autoconf.h
313 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
315 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
316 -fno-strict-aliasing -fno-common
317 AFLAGS := -D__ASSEMBLY__
319 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
320 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
321 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
323 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
324 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
325 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
326 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
328 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
329 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
330 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
332 # When compiling out-of-tree modules, put MODVERDIR in the module
333 # tree rather than in the kernel tree. The kernel tree might
334 # even be read-only.
335 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
337 # Files to ignore in find ... statements
339 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
340 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
342 # ===========================================================================
343 # Rules shared between *config targets and build targets
345 # Basic helpers built in scripts/
346 PHONY += scripts_basic
347 scripts_basic:
348 $(Q)$(MAKE) $(build)=scripts/basic
350 # To avoid any implicit rule to kick in, define an empty command.
351 scripts/basic/%: scripts_basic ;
353 PHONY += outputmakefile
354 # outputmakefile generates a Makefile in the output directory, if using a
355 # separate output directory. This allows convenient use of make in the
356 # output directory.
357 outputmakefile:
358 ifneq ($(KBUILD_SRC),)
359 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
360 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
361 endif
363 # To make sure we do not include .config for any of the *config targets
364 # catch them early, and hand them over to scripts/kconfig/Makefile
365 # It is allowed to specify more targets when calling make, including
366 # mixing *config targets and build targets.
367 # For example 'make oldconfig all'.
368 # Detect when mixed targets is specified, and make a second invocation
369 # of make so .config is not included in this case either (for *config).
371 no-dot-config-targets := clean mrproper distclean \
372 cscope TAGS tags help %docs check% \
373 include/linux/version.h headers_% \
374 kernelrelease kernelversion
376 config-targets := 0
377 mixed-targets := 0
378 dot-config := 1
380 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
381 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
382 dot-config := 0
383 endif
384 endif
386 ifeq ($(KBUILD_EXTMOD),)
387 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
388 config-targets := 1
389 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
390 mixed-targets := 1
391 endif
392 endif
393 endif
395 ifeq ($(mixed-targets),1)
396 # ===========================================================================
397 # We're called with mixed targets (*config and build targets).
398 # Handle them one by one.
400 %:: FORCE
401 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
403 else
404 ifeq ($(config-targets),1)
405 # ===========================================================================
406 # *config targets only - make sure prerequisites are updated, and descend
407 # in scripts/kconfig to make the *config target
409 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
410 # KBUILD_DEFCONFIG may point out an alternative default configuration
411 # used for 'make defconfig'
412 include $(srctree)/arch/$(ARCH)/Makefile
413 export KBUILD_DEFCONFIG
415 config %config: scripts_basic outputmakefile FORCE
416 $(Q)mkdir -p include/linux include/config
417 $(Q)$(MAKE) $(build)=scripts/kconfig $@
419 else
420 # ===========================================================================
421 # Build targets only - this includes vmlinux, arch specific targets, clean
422 # targets and others. In general all targets except *config targets.
424 ifeq ($(KBUILD_EXTMOD),)
425 # Additional helpers built in scripts/
426 # Carefully list dependencies so we do not try to build scripts twice
427 # in parallel
428 PHONY += scripts
429 scripts: scripts_basic include/config/auto.conf
430 $(Q)$(MAKE) $(build)=$(@)
432 # Objects we will link into vmlinux / subdirs we need to visit
433 init-y := init/
434 drivers-y := drivers/ sound/
435 net-y := net/
436 libs-y := lib/
437 core-y := usr/
438 endif # KBUILD_EXTMOD
440 ifeq ($(dot-config),1)
441 # Read in config
442 -include include/config/auto.conf
444 ifeq ($(KBUILD_EXTMOD),)
445 # Read in dependencies to all Kconfig* files, make sure to run
446 # oldconfig if changes are detected.
447 -include include/config/auto.conf.cmd
449 # To avoid any implicit rule to kick in, define an empty command
450 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
452 # If .config is newer than include/config/auto.conf, someone tinkered
453 # with it and forgot to run make oldconfig.
454 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
455 # we execute the config step to be sure to catch updated Kconfig files
456 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
458 else
459 # external modules needs include/linux/autoconf.h and include/config/auto.conf
460 # but do not care if they are up-to-date. Use auto.conf to trigger the test
461 PHONY += include/config/auto.conf
463 include/config/auto.conf:
464 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
465 echo; \
466 echo " ERROR: Kernel configuration is invalid."; \
467 echo " include/linux/autoconf.h or $@ are missing."; \
468 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
469 echo; \
470 /bin/false)
472 endif # KBUILD_EXTMOD
474 else
475 # Dummy target needed, because used as prerequisite
476 include/config/auto.conf: ;
477 endif # $(dot-config)
479 # The all: target is the default when no target is given on the
480 # command line.
481 # This allow a user to issue only 'make' to build a kernel including modules
482 # Defaults vmlinux but it is usually overridden in the arch makefile
483 all: vmlinux
485 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
486 CFLAGS += -Os
487 else
488 CFLAGS += -O2
489 endif
491 include $(srctree)/arch/$(ARCH)/Makefile
493 ifdef CONFIG_FRAME_POINTER
494 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
495 else
496 CFLAGS += -fomit-frame-pointer
497 endif
499 ifdef CONFIG_DEBUG_INFO
500 CFLAGS += -g
501 endif
503 # Force gcc to behave correct even for buggy distributions
504 CFLAGS += $(call cc-option, -fno-stack-protector)
506 # arch Makefile may override CC so keep this after arch Makefile is included
507 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
508 CHECKFLAGS += $(NOSTDINC_FLAGS)
510 # warn about C99 declaration after statement
511 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
513 # disable pointer signed / unsigned warnings in gcc 4.0
514 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
516 # Default kernel image to build when no specific target is given.
517 # KBUILD_IMAGE may be overruled on the command line or
518 # set in the environment
519 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
520 # this default value
521 export KBUILD_IMAGE ?= vmlinux
524 # INSTALL_PATH specifies where to place the updated kernel and system map
525 # images. Default is /boot, but you can set it to other values
526 export INSTALL_PATH ?= /boot
529 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
530 # relocations required by build roots. This is not defined in the
531 # makefile but the argument can be passed to make if needed.
534 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
535 export MODLIB
538 # INSTALL_MOD_STRIP, if defined, will cause modules to be
539 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
540 # the default option --strip-debug will be used. Otherwise,
541 # INSTALL_MOD_STRIP will used as the options to the strip command.
543 ifdef INSTALL_MOD_STRIP
544 ifeq ($(INSTALL_MOD_STRIP),1)
545 mod_strip_cmd = $(STRIP) --strip-debug
546 else
547 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
548 endif # INSTALL_MOD_STRIP=1
549 else
550 mod_strip_cmd = true
551 endif # INSTALL_MOD_STRIP
552 export mod_strip_cmd
555 ifeq ($(KBUILD_EXTMOD),)
556 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
558 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
559 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
560 $(net-y) $(net-m) $(libs-y) $(libs-m)))
562 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
563 $(init-n) $(init-) \
564 $(core-n) $(core-) $(drivers-n) $(drivers-) \
565 $(net-n) $(net-) $(libs-n) $(libs-))))
567 init-y := $(patsubst %/, %/built-in.o, $(init-y))
568 core-y := $(patsubst %/, %/built-in.o, $(core-y))
569 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
570 net-y := $(patsubst %/, %/built-in.o, $(net-y))
571 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
572 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
573 libs-y := $(libs-y1) $(libs-y2)
575 # Build vmlinux
576 # ---------------------------------------------------------------------------
577 # vmlinux is built from the objects selected by $(vmlinux-init) and
578 # $(vmlinux-main). Most are built-in.o files from top-level directories
579 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
580 # Ordering when linking is important, and $(vmlinux-init) must be first.
582 # vmlinux
585 # +-< $(vmlinux-init)
586 # | +--< init/version.o + more
588 # +--< $(vmlinux-main)
589 # | +--< driver/built-in.o mm/built-in.o + more
591 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
593 # vmlinux version (uname -v) cannot be updated during normal
594 # descending-into-subdirs phase since we do not yet know if we need to
595 # update vmlinux.
596 # Therefore this step is delayed until just before final link of vmlinux -
597 # except in the kallsyms case where it is done just before adding the
598 # symbols to the kernel.
600 # System.map is generated to document addresses of all kernel symbols
602 vmlinux-init := $(head-y) $(init-y)
603 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
604 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
605 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
606 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
608 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
609 # May be overridden by arch/$(ARCH)/Makefile
610 quiet_cmd_vmlinux__ ?= LD $@
611 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
612 -T $(vmlinux-lds) $(vmlinux-init) \
613 --start-group $(vmlinux-main) --end-group \
614 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
616 # Generate new vmlinux version
617 quiet_cmd_vmlinux_version = GEN .version
618 cmd_vmlinux_version = set -e; \
619 if [ ! -r .version ]; then \
620 rm -f .version; \
621 echo 1 >.version; \
622 else \
623 mv .version .old_version; \
624 expr 0$$(cat .old_version) + 1 >.version; \
625 fi; \
626 $(MAKE) $(build)=init
628 # Generate System.map
629 quiet_cmd_sysmap = SYSMAP
630 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
632 # Link of vmlinux
633 # If CONFIG_KALLSYMS is set .version is already updated
634 # Generate System.map and verify that the content is consistent
635 # Use + in front of the vmlinux_version rule to silent warning with make -j2
636 # First command is ':' to allow us to use + in front of the rule
637 define rule_vmlinux__
639 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
641 $(call cmd,vmlinux__)
642 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
644 $(Q)$(if $($(quiet)cmd_sysmap), \
645 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
646 $(cmd_sysmap) $@ System.map; \
647 if [ $$? -ne 0 ]; then \
648 rm -f $@; \
649 /bin/false; \
651 $(verify_kallsyms)
652 endef
655 ifdef CONFIG_KALLSYMS
656 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
657 # It's a three stage process:
658 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
659 # empty
660 # Running kallsyms on that gives us .tmp_kallsyms1.o with
661 # the right size - vmlinux version (uname -v) is updated during this step
662 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
663 # but due to the added section, some addresses have shifted.
664 # From here, we generate a correct .tmp_kallsyms2.o
665 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
666 # o Verify that the System.map from vmlinux matches the map from
667 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
668 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
669 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
670 # temporary bypass to allow the kernel to be built while the
671 # maintainers work out what went wrong with kallsyms.
673 ifdef CONFIG_KALLSYMS_EXTRA_PASS
674 last_kallsyms := 3
675 else
676 last_kallsyms := 2
677 endif
679 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
681 define verify_kallsyms
682 $(Q)$(if $($(quiet)cmd_sysmap), \
683 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
684 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
685 $(Q)cmp -s System.map .tmp_System.map || \
686 (echo Inconsistent kallsyms data; \
687 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
688 rm .tmp_kallsyms* ; /bin/false )
689 endef
691 # Update vmlinux version before link
692 # Use + in front of this rule to silent warning about make -j1
693 # First command is ':' to allow us to use + in front of this rule
694 cmd_ksym_ld = $(cmd_vmlinux__)
695 define rule_ksym_ld
697 +$(call cmd,vmlinux_version)
698 $(call cmd,vmlinux__)
699 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
700 endef
702 # Generate .S file with all kernel symbols
703 quiet_cmd_kallsyms = KSYM $@
704 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
705 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
707 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
708 $(call if_changed_dep,as_o_S)
710 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
711 $(call cmd,kallsyms)
713 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
714 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
715 $(call if_changed_rule,ksym_ld)
717 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
718 $(call if_changed,vmlinux__)
720 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
721 $(call if_changed,vmlinux__)
723 # Needs to visit scripts/ before $(KALLSYMS) can be used.
724 $(KALLSYMS): scripts ;
726 # Generate some data for debugging strange kallsyms problems
727 debug_kallsyms: .tmp_map$(last_kallsyms)
729 .tmp_map%: .tmp_vmlinux% FORCE
730 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
732 .tmp_map3: .tmp_map2
734 .tmp_map2: .tmp_map1
736 endif # ifdef CONFIG_KALLSYMS
738 # vmlinux image - including updated kernel symbols
739 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
740 ifdef CONFIG_HEADERS_CHECK
741 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
742 endif
743 $(call if_changed_rule,vmlinux__)
744 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
745 $(Q)rm -f .old_version
747 # The actual objects are generated when descending,
748 # make sure no implicit rule kicks in
749 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
751 # Handle descending into subdirectories listed in $(vmlinux-dirs)
752 # Preset locale variables to speed up the build process. Limit locale
753 # tweaks to this spot to avoid wrong language settings when running
754 # make menuconfig etc.
755 # Error messages still appears in the original language
757 PHONY += $(vmlinux-dirs)
758 $(vmlinux-dirs): prepare scripts
759 $(Q)$(MAKE) $(build)=$@
761 # Build the kernel release string
763 # The KERNELRELEASE value built here is stored in the file
764 # include/config/kernel.release, and is used when executing several
765 # make targets, such as "make install" or "make modules_install."
767 # The eventual kernel release string consists of the following fields,
768 # shown in a hierarchical format to show how smaller parts are concatenated
769 # to form the larger and final value, with values coming from places like
770 # the Makefile, kernel config options, make command line options and/or
771 # SCM tag information.
773 # $(KERNELVERSION)
774 # $(VERSION) eg, 2
775 # $(PATCHLEVEL) eg, 6
776 # $(SUBLEVEL) eg, 18
777 # $(EXTRAVERSION) eg, -rc6
778 # $(localver-full)
779 # $(localver)
780 # localversion* (files without backups, containing '~')
781 # $(CONFIG_LOCALVERSION) (from kernel config setting)
782 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
783 # ./scripts/setlocalversion (SCM tag, if one exists)
784 # $(LOCALVERSION) (from make command line if provided)
786 # Note how the final $(localver-auto) string is included *only* if the
787 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
788 # moment, only git is supported but other SCMs can edit the script
789 # scripts/setlocalversion and add the appropriate checks as needed.
791 pattern = ".*/localversion[^~]*"
792 string = $(shell cat /dev/null \
793 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
795 localver = $(subst $(space),, $(string) \
796 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
798 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
799 # and if the SCM is know a tag from the SCM is appended.
800 # The appended tag is determined by the SCM used.
802 # Currently, only git is supported.
803 # Other SCMs can edit scripts/setlocalversion and add the appropriate
804 # checks as needed.
805 ifdef CONFIG_LOCALVERSION_AUTO
806 _localver-auto = $(shell $(CONFIG_SHELL) \
807 $(srctree)/scripts/setlocalversion $(srctree))
808 localver-auto = $(LOCALVERSION)$(_localver-auto)
809 endif
811 localver-full = $(localver)$(localver-auto)
813 # Store (new) KERNELRELASE string in include/config/kernel.release
814 kernelrelease = $(KERNELVERSION)$(localver-full)
815 include/config/kernel.release: include/config/auto.conf FORCE
816 $(Q)rm -f $@
817 $(Q)echo $(kernelrelease) > $@
820 # Things we need to do before we recursively start building the kernel
821 # or the modules are listed in "prepare".
822 # A multi level approach is used. prepareN is processed before prepareN-1.
823 # archprepare is used in arch Makefiles and when processed asm symlink,
824 # version.h and scripts_basic is processed / created.
826 # Listed in dependency order
827 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
829 # prepare3 is used to check if we are building in a separate output directory,
830 # and if so do:
831 # 1) Check that make has not been executed in the kernel src $(srctree)
832 # 2) Create the include2 directory, used for the second asm symlink
833 prepare3: include/config/kernel.release
834 ifneq ($(KBUILD_SRC),)
835 @echo ' Using $(srctree) as source for kernel'
836 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
837 echo " $(srctree) is not clean, please run 'make mrproper'";\
838 echo " in the '$(srctree)' directory.";\
839 /bin/false; \
841 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
842 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
843 endif
845 # prepare2 creates a makefile if using a separate output directory
846 prepare2: prepare3 outputmakefile
848 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
849 include/asm include/config/auto.conf
850 ifneq ($(KBUILD_MODULES),)
851 $(Q)mkdir -p $(MODVERDIR)
852 $(Q)rm -f $(MODVERDIR)/*
853 endif
855 archprepare: prepare1 scripts_basic
857 prepare0: archprepare FORCE
858 $(Q)$(MAKE) $(build)=.
859 $(Q)$(MAKE) $(build)=. missing-syscalls
861 # All the preparing..
862 prepare: prepare0
864 # Leave this as default for preprocessing vmlinux.lds.S, which is now
865 # done in arch/$(ARCH)/kernel/Makefile
867 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
869 # FIXME: The asm symlink changes when $(ARCH) changes. That's
870 # hard to detect, but I suppose "make mrproper" is a good idea
871 # before switching between archs anyway.
873 include/asm:
874 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
875 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
876 @ln -fsn asm-$(ARCH) $@
878 # Generate some files
879 # ---------------------------------------------------------------------------
881 # KERNELRELEASE can change from a few different places, meaning version.h
882 # needs to be updated, so this check is forced on all builds
884 uts_len := 64
885 define filechk_utsrelease.h
886 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
887 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
888 exit 1; \
889 fi; \
890 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
891 endef
893 define filechk_version.h
894 (echo \#define LINUX_VERSION_CODE $(shell \
895 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
896 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
897 endef
899 include/linux/version.h: $(srctree)/Makefile FORCE
900 $(call filechk,version.h)
902 include/linux/utsrelease.h: include/config/kernel.release FORCE
903 $(call filechk,utsrelease.h)
905 # ---------------------------------------------------------------------------
907 PHONY += depend dep
908 depend dep:
909 @echo '*** Warning: make $@ is unnecessary now.'
911 # ---------------------------------------------------------------------------
912 # Kernel headers
913 INSTALL_HDR_PATH=$(objtree)/usr
914 export INSTALL_HDR_PATH
916 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
918 PHONY += headers_install_all
919 headers_install_all: include/linux/version.h scripts_basic FORCE
920 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
921 $(Q)for arch in $(HDRARCHES); do \
922 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
923 done
925 PHONY += headers_install
926 headers_install: include/linux/version.h scripts_basic FORCE
927 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
928 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
929 exit 1 ; fi
930 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
931 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
933 PHONY += headers_check_all
934 headers_check_all: headers_install_all
935 $(Q)for arch in $(HDRARCHES); do \
936 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
937 done
939 PHONY += headers_check
940 headers_check: headers_install
941 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
943 # ---------------------------------------------------------------------------
944 # Modules
946 ifdef CONFIG_MODULES
948 # By default, build modules as well
950 all: modules
952 # Build modules
954 PHONY += modules
955 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
956 @echo ' Building modules, stage 2.';
957 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
960 # Target to prepare building external modules
961 PHONY += modules_prepare
962 modules_prepare: prepare scripts
964 # Target to install modules
965 PHONY += modules_install
966 modules_install: _modinst_ _modinst_post
968 PHONY += _modinst_
969 _modinst_:
970 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
971 echo "Warning: you may need to install module-init-tools"; \
972 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
973 sleep 1; \
975 @rm -rf $(MODLIB)/kernel
976 @rm -f $(MODLIB)/source
977 @mkdir -p $(MODLIB)/kernel
978 @ln -s $(srctree) $(MODLIB)/source
979 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
980 rm -f $(MODLIB)/build ; \
981 ln -s $(objtree) $(MODLIB)/build ; \
983 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
985 # If System.map exists, run depmod. This deliberately does not have a
986 # dependency on System.map since that would run the dependency tree on
987 # vmlinux. This depmod is only for convenience to give the initial
988 # boot a modules.dep even before / is mounted read-write. However the
989 # boot script depmod is the master version.
990 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
991 depmod_opts :=
992 else
993 depmod_opts := -b $(INSTALL_MOD_PATH) -r
994 endif
995 PHONY += _modinst_post
996 _modinst_post: _modinst_
997 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
999 else # CONFIG_MODULES
1001 # Modules not configured
1002 # ---------------------------------------------------------------------------
1004 modules modules_install: FORCE
1005 @echo
1006 @echo "The present kernel configuration has modules disabled."
1007 @echo "Type 'make config' and enable loadable module support."
1008 @echo "Then build a kernel with module support enabled."
1009 @echo
1010 @exit 1
1012 endif # CONFIG_MODULES
1015 # Cleaning is done on three levels.
1016 # make clean Delete most generated files
1017 # Leave enough to build external modules
1018 # make mrproper Delete the current configuration, and all generated files
1019 # make distclean Remove editor backup files, patch leftover files and the like
1021 # Directories & files removed with 'make clean'
1022 CLEAN_DIRS += $(MODVERDIR)
1023 CLEAN_FILES += vmlinux System.map \
1024 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1026 # Directories & files removed with 'make mrproper'
1027 MRPROPER_DIRS += include/config include2 usr/include
1028 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1029 include/linux/autoconf.h include/linux/version.h \
1030 include/linux/utsrelease.h \
1031 Module.symvers tags TAGS cscope*
1033 # clean - Delete most, but leave enough to build external modules
1035 clean: rm-dirs := $(CLEAN_DIRS)
1036 clean: rm-files := $(CLEAN_FILES)
1037 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1039 PHONY += $(clean-dirs) clean archclean
1040 $(clean-dirs):
1041 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1043 clean: archclean $(clean-dirs)
1044 $(call cmd,rmdirs)
1045 $(call cmd,rmfiles)
1046 @find . $(RCS_FIND_IGNORE) \
1047 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1048 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1049 -o -name '*.symtypes' \) \
1050 -type f -print | xargs rm -f
1052 # mrproper - Delete all generated files, including .config
1054 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1055 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1056 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1058 PHONY += $(mrproper-dirs) mrproper archmrproper
1059 $(mrproper-dirs):
1060 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1062 mrproper: clean archmrproper $(mrproper-dirs)
1063 $(call cmd,rmdirs)
1064 $(call cmd,rmfiles)
1066 # distclean
1068 PHONY += distclean
1070 distclean: mrproper
1071 @find $(srctree) $(RCS_FIND_IGNORE) \
1072 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1073 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1074 -o -name '.*.rej' -o -size 0 \
1075 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1076 -type f -print | xargs rm -f
1079 # Packaging of the kernel to various formats
1080 # ---------------------------------------------------------------------------
1081 # rpm target kept for backward compatibility
1082 package-dir := $(srctree)/scripts/package
1084 %pkg: include/config/kernel.release FORCE
1085 $(Q)$(MAKE) $(build)=$(package-dir) $@
1086 rpm: include/config/kernel.release FORCE
1087 $(Q)$(MAKE) $(build)=$(package-dir) $@
1090 # Brief documentation of the typical targets used
1091 # ---------------------------------------------------------------------------
1093 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1094 boards := $(notdir $(boards))
1096 help:
1097 @echo 'Cleaning targets:'
1098 @echo ' clean - Remove most generated files but keep the config and'
1099 @echo ' enough build support to build external modules'
1100 @echo ' mrproper - Remove all generated files + config + various backup files'
1101 @echo ' distclean - mrproper + remove editor backup and patch files'
1102 @echo ''
1103 @echo 'Configuration targets:'
1104 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1105 @echo ''
1106 @echo 'Other generic targets:'
1107 @echo ' all - Build all targets marked with [*]'
1108 @echo '* vmlinux - Build the bare kernel'
1109 @echo '* modules - Build all modules'
1110 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1111 @echo ' dir/ - Build all files in dir and below'
1112 @echo ' dir/file.[ois] - Build specified target only'
1113 @echo ' dir/file.ko - Build module including final link'
1114 @echo ' rpm - Build a kernel as an RPM package'
1115 @echo ' tags/TAGS - Generate tags file for editors'
1116 @echo ' cscope - Generate cscope index'
1117 @echo ' kernelrelease - Output the release version string'
1118 @echo ' kernelversion - Output the version stored in Makefile'
1119 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1120 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1121 echo ' (default: $(INSTALL_HDR_PATH))'; \
1123 @echo ''
1124 @echo 'Static analysers'
1125 @echo ' checkstack - Generate a list of stack hogs'
1126 @echo ' namespacecheck - Name space analysis on compiled kernel'
1127 @if [ -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
1128 echo ' headers_check - Sanity check on exported headers'; \
1130 @echo ''
1131 @echo 'Kernel packaging:'
1132 @$(MAKE) $(build)=$(package-dir) help
1133 @echo ''
1134 @echo 'Documentation targets:'
1135 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1136 @echo ''
1137 @echo 'Architecture specific targets ($(ARCH)):'
1138 @$(if $(archhelp),$(archhelp),\
1139 echo ' No architecture specific help defined for $(ARCH)')
1140 @echo ''
1141 @$(if $(boards), \
1142 $(foreach b, $(boards), \
1143 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1144 echo '')
1146 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1147 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1148 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1149 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1150 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1151 @echo ''
1152 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1153 @echo 'For further info see the ./README file'
1156 # Documentation targets
1157 # ---------------------------------------------------------------------------
1158 %docs: scripts_basic FORCE
1159 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1161 else # KBUILD_EXTMOD
1164 # External module support.
1165 # When building external modules the kernel used as basis is considered
1166 # read-only, and no consistency checks are made and the make
1167 # system is not used on the basis kernel. If updates are required
1168 # in the basis kernel ordinary make commands (without M=...) must
1169 # be used.
1171 # The following are the only valid targets when building external
1172 # modules.
1173 # make M=dir clean Delete all automatically generated files
1174 # make M=dir modules Make all modules in specified dir
1175 # make M=dir Same as 'make M=dir modules'
1176 # make M=dir modules_install
1177 # Install the modules built in the module directory
1178 # Assumes install directory is already created
1180 # We are always building modules
1181 KBUILD_MODULES := 1
1182 PHONY += crmodverdir
1183 crmodverdir:
1184 $(Q)mkdir -p $(MODVERDIR)
1185 $(Q)rm -f $(MODVERDIR)/*
1187 PHONY += $(objtree)/Module.symvers
1188 $(objtree)/Module.symvers:
1189 @test -e $(objtree)/Module.symvers || ( \
1190 echo; \
1191 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1192 echo " is missing; modules will have no dependencies and modversions."; \
1193 echo )
1195 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1196 PHONY += $(module-dirs) modules
1197 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1198 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1200 modules: $(module-dirs)
1201 @echo ' Building modules, stage 2.';
1202 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1204 PHONY += modules_install
1205 modules_install: _emodinst_ _emodinst_post
1207 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1208 PHONY += _emodinst_
1209 _emodinst_:
1210 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1211 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1213 # Run depmod only is we have System.map and depmod is executable
1214 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1215 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1216 $(DEPMOD) -ae -F System.map \
1217 $(if $(strip $(INSTALL_MOD_PATH)), \
1218 -b $(INSTALL_MOD_PATH) -r) \
1219 $(KERNELRELEASE); \
1222 PHONY += _emodinst_post
1223 _emodinst_post: _emodinst_
1224 $(call cmd,depmod)
1226 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1228 PHONY += $(clean-dirs) clean
1229 $(clean-dirs):
1230 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1232 clean: rm-dirs := $(MODVERDIR)
1233 clean: $(clean-dirs)
1234 $(call cmd,rmdirs)
1235 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1236 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1237 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1238 -type f -print | xargs rm -f
1240 help:
1241 @echo ' Building external modules.'
1242 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1243 @echo ''
1244 @echo ' modules - default target, build the module(s)'
1245 @echo ' modules_install - install the module'
1246 @echo ' clean - remove generated files in module directory only'
1247 @echo ''
1249 # Dummies...
1250 PHONY += prepare scripts
1251 prepare: ;
1252 scripts: ;
1253 endif # KBUILD_EXTMOD
1255 # Generate tags for editors
1256 # ---------------------------------------------------------------------------
1258 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1259 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1260 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1262 ifeq ($(src),$(obj))
1263 __srctree =
1264 else
1265 __srctree = $(srctree)/
1266 endif
1268 ifeq ($(ALLSOURCE_ARCHS),)
1269 ifeq ($(ARCH),um)
1270 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1271 else
1272 ALLINCLUDE_ARCHS := $(ARCH)
1273 endif
1274 else
1275 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1276 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1277 endif
1279 ALLSOURCE_ARCHS := $(ARCH)
1281 define find-sources
1282 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \
1283 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1284 -name $1 -print; \
1285 done ; \
1286 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1287 -name $1 -print; \
1288 find $(__srctree)include $(RCS_FIND_IGNORE) \
1289 \( -name config -o -name 'asm-*' \) -prune \
1290 -o -name $1 -print; \
1291 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1292 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1293 -name $1 -print; \
1294 done ; \
1295 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1296 -name $1 -print; \
1297 find $(__srctree) $(RCS_FIND_IGNORE) \
1298 \( -name include -o -name arch \) -prune -o \
1299 -name $1 -print; \
1301 endef
1303 define all-sources
1304 $(call find-sources,'*.[chS]')
1305 endef
1306 define all-kconfigs
1307 $(call find-sources,'Kconfig*')
1308 endef
1309 define all-defconfigs
1310 $(call find-sources,'defconfig')
1311 endef
1313 define xtags
1314 if $1 --version 2>&1 | grep -iq exuberant; then \
1315 $(all-sources) | xargs $1 -a \
1316 -I __initdata,__exitdata,__acquires,__releases \
1317 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1318 --extra=+f --c-kinds=+px \
1319 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1320 $(all-kconfigs) | xargs $1 -a \
1321 --langdef=kconfig \
1322 --language-force=kconfig \
1323 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1324 $(all-defconfigs) | xargs -r $1 -a \
1325 --langdef=dotconfig \
1326 --language-force=dotconfig \
1327 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1328 elif $1 --version 2>&1 | grep -iq emacs; then \
1329 $(all-sources) | xargs $1 -a; \
1330 $(all-kconfigs) | xargs $1 -a \
1331 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1332 $(all-defconfigs) | xargs -r $1 -a \
1333 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1334 else \
1335 $(all-sources) | xargs $1 -a; \
1337 endef
1339 quiet_cmd_cscope-file = FILELST cscope.files
1340 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1342 quiet_cmd_cscope = MAKE cscope.out
1343 cmd_cscope = cscope -b
1345 cscope: FORCE
1346 $(call cmd,cscope-file)
1347 $(call cmd,cscope)
1349 quiet_cmd_TAGS = MAKE $@
1350 define cmd_TAGS
1351 rm -f $@; \
1352 $(call xtags,etags)
1353 endef
1355 TAGS: FORCE
1356 $(call cmd,TAGS)
1358 quiet_cmd_tags = MAKE $@
1359 define cmd_tags
1360 rm -f $@; \
1361 $(call xtags,ctags)
1362 endef
1364 tags: FORCE
1365 $(call cmd,tags)
1368 # Scripts to check various things for consistency
1369 # ---------------------------------------------------------------------------
1371 includecheck:
1372 find * $(RCS_FIND_IGNORE) \
1373 -name '*.[hcS]' -type f -print | sort \
1374 | xargs $(PERL) -w scripts/checkincludes.pl
1376 versioncheck:
1377 find * $(RCS_FIND_IGNORE) \
1378 -name '*.[hcS]' -type f -print | sort \
1379 | xargs $(PERL) -w scripts/checkversion.pl
1381 namespacecheck:
1382 $(PERL) $(srctree)/scripts/namespace.pl
1384 endif #ifeq ($(config-targets),1)
1385 endif #ifeq ($(mixed-targets),1)
1387 PHONY += checkstack kernelrelease kernelversion
1389 # UML needs a little special treatment here. It wants to use the host
1390 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1391 # else wants $(ARCH), including people doing cross-builds, which means
1392 # that $(SUBARCH) doesn't work here.
1393 ifeq ($(ARCH), um)
1394 CHECKSTACK_ARCH := $(SUBARCH)
1395 else
1396 CHECKSTACK_ARCH := $(ARCH)
1397 endif
1398 checkstack:
1399 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1400 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1402 kernelrelease:
1403 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1404 $(error kernelrelease not valid - run 'make prepare' to update it))
1405 kernelversion:
1406 @echo $(KERNELVERSION)
1408 # Single targets
1409 # ---------------------------------------------------------------------------
1410 # Single targets are compatible with:
1411 # - build whith mixed source and output
1412 # - build with separate output dir 'make O=...'
1413 # - external modules
1415 # target-dir => where to store outputfile
1416 # build-dir => directory in kernel source tree to use
1418 ifeq ($(KBUILD_EXTMOD),)
1419 build-dir = $(patsubst %/,%,$(dir $@))
1420 target-dir = $(dir $@)
1421 else
1422 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1423 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1424 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1425 endif
1427 %.s: %.c prepare scripts FORCE
1428 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429 %.i: %.c prepare scripts FORCE
1430 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431 %.o: %.c prepare scripts FORCE
1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1433 %.lst: %.c prepare scripts FORCE
1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1435 %.s: %.S prepare scripts FORCE
1436 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1437 %.o: %.S prepare scripts FORCE
1438 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1439 %.symtypes: %.c prepare scripts FORCE
1440 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1442 # Modules
1443 / %/: prepare scripts FORCE
1444 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1445 $(build)=$(build-dir)
1446 %.ko: prepare scripts FORCE
1447 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1448 $(build)=$(build-dir) $(@:.ko=.o)
1449 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1451 # FIXME Should go into a make.lib or something
1452 # ===========================================================================
1454 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1455 cmd_rmdirs = rm -rf $(rm-dirs)
1457 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1458 cmd_rmfiles = rm -f $(rm-files)
1461 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1462 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1463 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1465 quiet_cmd_as_o_S = AS $@
1466 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1468 # read all saved command lines
1470 targets := $(wildcard $(sort $(targets)))
1471 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1473 ifneq ($(cmd_files),)
1474 $(cmd_files): ; # Do not try to update included dependency files
1475 include $(cmd_files)
1476 endif
1478 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1479 # Usage:
1480 # $(Q)$(MAKE) $(clean)=dir
1481 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1483 endif # skip-makefile
1485 PHONY += FORCE
1486 FORCE:
1488 # Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes.
1489 Makefile: ;
1491 # Declare the contents of the .PHONY variable as phony. We keep that
1492 # information in a variable se we can use it in if_changed and friends.
1493 .PHONY: $(PHONY)