[MIPS] Don't print presence of WAIT instruction on bootup.
[linux-2.6/linux-mips.git] / Makefile
blobc692864a7410620388962a90889d8ba76fec375b
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 19
4 EXTRAVERSION =
5 NAME=Avast! A bilge rat!
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 print "Entering directory ..."
14 MAKEFLAGS += --no-print-directory
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's often
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
25 # is now up to date.
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
30 # prepare rule.
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
35 ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39 endif
40 ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42 endif
44 # Call a source code checker (by default, "sparse") as part of the
45 # C compilation.
47 # Use 'make C=1' to enable checking of only re-compiled files.
48 # Use 'make C=2' to enable checking of *all* source files, regardless
49 # of whether they are re-compiled or not.
51 # See the file "Documentation/sparse.txt" for more details, including
52 # where to get the "sparse" utility.
54 ifdef C
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
57 endif
58 endif
59 ifndef KBUILD_CHECKSRC
60 KBUILD_CHECKSRC = 0
61 endif
63 # Use make M=dir to specify directory of external module to build
64 # Old syntax make ... SUBDIRS=$PWD is still supported
65 # Setting the environment variable KBUILD_EXTMOD take precedence
66 ifdef SUBDIRS
67 KBUILD_EXTMOD ?= $(SUBDIRS)
68 endif
69 ifdef M
70 ifeq ("$(origin M)", "command line")
71 KBUILD_EXTMOD := $(M)
72 endif
73 endif
76 # kbuild supports saving output files in a separate directory.
77 # To locate output files in a separate directory two syntaxes are supported.
78 # In both cases the working directory must be the root of the kernel src.
79 # 1) O=
80 # Use "make O=dir/to/store/output/files/"
82 # 2) Set KBUILD_OUTPUT
83 # Set the environment variable KBUILD_OUTPUT to point to the directory
84 # where the output files shall be placed.
85 # export KBUILD_OUTPUT=dir/to/store/output/files/
86 # make
88 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
89 # variable.
92 # KBUILD_SRC is set on invocation of make in OBJ directory
93 # KBUILD_SRC is not intended to be used by the regular user (for now)
94 ifeq ($(KBUILD_SRC),)
96 # OK, Make called in directory where kernel src resides
97 # Do we want to locate output files in a separate directory?
98 ifdef O
99 ifeq ("$(origin O)", "command line")
100 KBUILD_OUTPUT := $(O)
101 endif
102 endif
104 # That's our default target when none is given on the command line
105 PHONY := _all
106 _all:
108 ifneq ($(KBUILD_OUTPUT),)
109 # Invoke a second make in the output directory, passing relevant variables
110 # check that the output directory actually exists
111 saved-output := $(KBUILD_OUTPUT)
112 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
113 $(if $(KBUILD_OUTPUT),, \
114 $(error output directory "$(saved-output)" does not exist))
116 PHONY += $(MAKECMDGOALS)
118 $(filter-out _all,$(MAKECMDGOALS)) _all:
119 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
120 KBUILD_SRC=$(CURDIR) \
121 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
123 # Leave processing to above invocation of make
124 skip-makefile := 1
125 endif # ifneq ($(KBUILD_OUTPUT),)
126 endif # ifeq ($(KBUILD_SRC),)
128 # We process the rest of the Makefile if this is the final invocation of make
129 ifeq ($(skip-makefile),)
131 # If building an external module we do not care about the all: rule
132 # but instead _all depend on modules
133 PHONY += all
134 ifeq ($(KBUILD_EXTMOD),)
135 _all: all
136 else
137 _all: modules
138 endif
140 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
141 TOPDIR := $(srctree)
142 # FIXME - TOPDIR is obsolete, use srctree/objtree
143 objtree := $(CURDIR)
144 src := $(srctree)
145 obj := $(objtree)
147 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
149 export srctree objtree VPATH TOPDIR
152 # SUBARCH tells the usermode build what the underlying arch is. That is set
153 # first, and if a usermode build is happening, the "ARCH=um" on the command
154 # line overrides the setting of ARCH below. If a native build is happening,
155 # then ARCH is assigned, getting whatever value it gets normally, and
156 # SUBARCH is subsequently ignored.
158 SUBARCH := mips
160 # Cross compiling and selecting different set of gcc/bin-utils
161 # ---------------------------------------------------------------------------
163 # When performing cross compilation for other architectures ARCH shall be set
164 # to the target architecture. (See arch/* for the possibilities).
165 # ARCH can be set during invocation of make:
166 # make ARCH=ia64
167 # Another way is to have ARCH set in the environment.
168 # The default ARCH is the host where make is executed.
170 # CROSS_COMPILE specify the prefix used for all executables used
171 # during compilation. Only gcc and related bin-utils executables
172 # are prefixed with $(CROSS_COMPILE).
173 # CROSS_COMPILE can be set on the command line
174 # make CROSS_COMPILE=ia64-linux-
175 # Alternatively CROSS_COMPILE can be set in the environment.
176 # Default value for CROSS_COMPILE is not to prefix executables
177 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
179 ARCH ?= $(SUBARCH)
180 CROSS_COMPILE ?=
182 # Architecture as present in compile.h
183 UTS_MACHINE := $(ARCH)
185 KCONFIG_CONFIG ?= .config
187 # SHELL used by kbuild
188 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
189 else if [ -x /bin/bash ]; then echo /bin/bash; \
190 else echo sh; fi ; fi)
192 HOSTCC = gcc
193 HOSTCXX = g++
194 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
195 HOSTCXXFLAGS = -O2
197 # Decide whether to build built-in, modular, or both.
198 # Normally, just do built-in.
200 KBUILD_MODULES :=
201 KBUILD_BUILTIN := 1
203 # If we have only "make modules", don't compile built-in objects.
204 # When we're building modules with modversions, we need to consider
205 # the built-in objects during the descend as well, in order to
206 # make sure the checksums are up to date before we record them.
208 ifeq ($(MAKECMDGOALS),modules)
209 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
210 endif
212 # If we have "make <whatever> modules", compile modules
213 # in addition to whatever we do anyway.
214 # Just "make" or "make all" shall build modules as well
216 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
217 KBUILD_MODULES := 1
218 endif
220 ifeq ($(MAKECMDGOALS),)
221 KBUILD_MODULES := 1
222 endif
224 export KBUILD_MODULES KBUILD_BUILTIN
225 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
227 # Beautify output
228 # ---------------------------------------------------------------------------
230 # Normally, we echo the whole command before executing it. By making
231 # that echo $($(quiet)$(cmd)), we now have the possibility to set
232 # $(quiet) to choose other forms of output instead, e.g.
234 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
235 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
237 # If $(quiet) is empty, the whole command will be printed.
238 # If it is set to "quiet_", only the short version will be printed.
239 # If it is set to "silent_", nothing will be printed at all, since
240 # the variable $(silent_cmd_cc_o_c) doesn't exist.
242 # A simple variant is to prefix commands with $(Q) - that's useful
243 # for commands that shall be hidden in non-verbose mode.
245 # $(Q)ln $@ :<
247 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
248 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
250 ifeq ($(KBUILD_VERBOSE),1)
251 quiet =
253 else
254 quiet=quiet_
255 Q = @
256 endif
258 # If the user is running make -s (silent mode), suppress echoing of
259 # commands
261 ifneq ($(findstring s,$(MAKEFLAGS)),)
262 quiet=silent_
263 endif
265 export quiet Q KBUILD_VERBOSE
268 # Look for make include files relative to root of kernel src
269 MAKEFLAGS += --include-dir=$(srctree)
271 # We need some generic definitions
272 include $(srctree)/scripts/Kbuild.include
274 # Do not use make's built-in rules and variables
275 # This increases performance and avoid hard-to-debug behavour
276 MAKEFLAGS += -rR
278 # Make variables (CC, etc...)
280 AS = $(CROSS_COMPILE)as
281 LD = $(CROSS_COMPILE)ld
282 CC = $(CROSS_COMPILE)gcc
283 CPP = $(CC) -E
284 AR = $(CROSS_COMPILE)ar
285 NM = $(CROSS_COMPILE)nm
286 STRIP = $(CROSS_COMPILE)strip
287 OBJCOPY = $(CROSS_COMPILE)objcopy
288 OBJDUMP = $(CROSS_COMPILE)objdump
289 AWK = awk
290 GENKSYMS = scripts/genksyms/genksyms
291 DEPMOD = /sbin/depmod
292 KALLSYMS = scripts/kallsyms
293 PERL = perl
294 CHECK = sparse
296 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
297 MODFLAGS = -DMODULE
298 CFLAGS_MODULE = $(MODFLAGS)
299 AFLAGS_MODULE = $(MODFLAGS)
300 LDFLAGS_MODULE = -r
301 CFLAGS_KERNEL =
302 AFLAGS_KERNEL =
305 # Use LINUXINCLUDE when you must reference the include/ directory.
306 # Needed to be compatible with the O= option
307 LINUXINCLUDE := -Iinclude \
308 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
309 -include include/linux/autoconf.h
311 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
313 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
314 -fno-strict-aliasing -fno-common
315 AFLAGS := -D__ASSEMBLY__
317 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
318 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
319 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
321 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
322 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
323 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
324 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
326 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
327 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
328 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
330 # When compiling out-of-tree modules, put MODVERDIR in the module
331 # tree rather than in the kernel tree. The kernel tree might
332 # even be read-only.
333 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
335 # Files to ignore in find ... statements
337 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
338 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
340 # ===========================================================================
341 # Rules shared between *config targets and build targets
343 # Basic helpers built in scripts/
344 PHONY += scripts_basic
345 scripts_basic:
346 $(Q)$(MAKE) $(build)=scripts/basic
348 # To avoid any implicit rule to kick in, define an empty command.
349 scripts/basic/%: scripts_basic ;
351 PHONY += outputmakefile
352 # outputmakefile generates a Makefile in the output directory, if using a
353 # separate output directory. This allows convenient use of make in the
354 # output directory.
355 outputmakefile:
356 ifneq ($(KBUILD_SRC),)
357 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
358 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
359 endif
361 # To make sure we do not include .config for any of the *config targets
362 # catch them early, and hand them over to scripts/kconfig/Makefile
363 # It is allowed to specify more targets when calling make, including
364 # mixing *config targets and build targets.
365 # For example 'make oldconfig all'.
366 # Detect when mixed targets is specified, and make a second invocation
367 # of make so .config is not included in this case either (for *config).
369 no-dot-config-targets := clean mrproper distclean \
370 cscope TAGS tags help %docs check% \
371 include/linux/version.h headers_% \
372 kernelrelease kernelversion
374 config-targets := 0
375 mixed-targets := 0
376 dot-config := 1
378 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
379 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
380 dot-config := 0
381 endif
382 endif
384 ifeq ($(KBUILD_EXTMOD),)
385 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
386 config-targets := 1
387 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
388 mixed-targets := 1
389 endif
390 endif
391 endif
393 ifeq ($(mixed-targets),1)
394 # ===========================================================================
395 # We're called with mixed targets (*config and build targets).
396 # Handle them one by one.
398 %:: FORCE
399 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
401 else
402 ifeq ($(config-targets),1)
403 # ===========================================================================
404 # *config targets only - make sure prerequisites are updated, and descend
405 # in scripts/kconfig to make the *config target
407 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
408 # KBUILD_DEFCONFIG may point out an alternative default configuration
409 # used for 'make defconfig'
410 include $(srctree)/arch/$(ARCH)/Makefile
411 export KBUILD_DEFCONFIG
413 config %config: scripts_basic outputmakefile FORCE
414 $(Q)mkdir -p include/linux include/config
415 $(Q)$(MAKE) $(build)=scripts/kconfig $@
417 else
418 # ===========================================================================
419 # Build targets only - this includes vmlinux, arch specific targets, clean
420 # targets and others. In general all targets except *config targets.
422 ifeq ($(KBUILD_EXTMOD),)
423 # Additional helpers built in scripts/
424 # Carefully list dependencies so we do not try to build scripts twice
425 # in parallel
426 PHONY += scripts
427 scripts: scripts_basic include/config/auto.conf
428 $(Q)$(MAKE) $(build)=$(@)
430 # Objects we will link into vmlinux / subdirs we need to visit
431 init-y := init/
432 drivers-y := drivers/ sound/
433 net-y := net/
434 libs-y := lib/
435 core-y := usr/
436 endif # KBUILD_EXTMOD
438 ifeq ($(dot-config),1)
439 # Read in config
440 -include include/config/auto.conf
442 ifeq ($(KBUILD_EXTMOD),)
443 # Read in dependencies to all Kconfig* files, make sure to run
444 # oldconfig if changes are detected.
445 -include include/config/auto.conf.cmd
447 # To avoid any implicit rule to kick in, define an empty command
448 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
450 # If .config is newer than include/config/auto.conf, someone tinkered
451 # with it and forgot to run make oldconfig.
452 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
453 # we execute the config step to be sure to catch updated Kconfig files
454 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
455 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
456 else
457 # external modules needs include/linux/autoconf.h and include/config/auto.conf
458 # but do not care if they are up-to-date. Use auto.conf to trigger the test
459 PHONY += include/config/auto.conf
461 include/config/auto.conf:
462 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
463 echo; \
464 echo " ERROR: Kernel configuration is invalid."; \
465 echo " include/linux/autoconf.h or $@ are missing."; \
466 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
467 echo; \
468 /bin/false)
470 endif # KBUILD_EXTMOD
472 else
473 # Dummy target needed, because used as prerequisite
474 include/config/auto.conf: ;
475 endif # $(dot-config)
477 # The all: target is the default when no target is given on the
478 # command line.
479 # This allow a user to issue only 'make' to build a kernel including modules
480 # Defaults vmlinux but it is usually overridden in the arch makefile
481 all: vmlinux
483 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
484 CFLAGS += -Os
485 else
486 CFLAGS += -O2
487 endif
489 include $(srctree)/arch/$(ARCH)/Makefile
491 ifdef CONFIG_FRAME_POINTER
492 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
493 else
494 CFLAGS += -fomit-frame-pointer
495 endif
497 ifdef CONFIG_UNWIND_INFO
498 CFLAGS += -fasynchronous-unwind-tables
499 LDFLAGS_vmlinux += --eh-frame-hdr
500 endif
502 ifdef CONFIG_DEBUG_INFO
503 CFLAGS += -g
504 endif
506 # Force gcc to behave correct even for buggy distributions
507 CFLAGS += $(call cc-option, -fno-stack-protector)
509 # arch Makefile may override CC so keep this after arch Makefile is included
510 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
511 CHECKFLAGS += $(NOSTDINC_FLAGS)
513 # warn about C99 declaration after statement
514 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
516 # disable pointer signed / unsigned warnings in gcc 4.0
517 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
519 # Default kernel image to build when no specific target is given.
520 # KBUILD_IMAGE may be overruled on the command line or
521 # set in the environment
522 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
523 # this default value
524 export KBUILD_IMAGE ?= vmlinux
527 # INSTALL_PATH specifies where to place the updated kernel and system map
528 # images. Default is /boot, but you can set it to other values
529 export INSTALL_PATH ?= /boot
532 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
533 # relocations required by build roots. This is not defined in the
534 # makefile but the argument can be passed to make if needed.
537 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
538 export MODLIB
541 # INSTALL_MOD_STRIP, if defined, will cause modules to be
542 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
543 # the default option --strip-debug will be used. Otherwise,
544 # INSTALL_MOD_STRIP will used as the options to the strip command.
546 ifdef INSTALL_MOD_STRIP
547 ifeq ($(INSTALL_MOD_STRIP),1)
548 mod_strip_cmd = $(STRIP) --strip-debug
549 else
550 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
551 endif # INSTALL_MOD_STRIP=1
552 else
553 mod_strip_cmd = true
554 endif # INSTALL_MOD_STRIP
555 export mod_strip_cmd
558 ifeq ($(KBUILD_EXTMOD),)
559 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
561 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
562 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
563 $(net-y) $(net-m) $(libs-y) $(libs-m)))
565 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
566 $(init-n) $(init-) \
567 $(core-n) $(core-) $(drivers-n) $(drivers-) \
568 $(net-n) $(net-) $(libs-n) $(libs-))))
570 init-y := $(patsubst %/, %/built-in.o, $(init-y))
571 core-y := $(patsubst %/, %/built-in.o, $(core-y))
572 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
573 net-y := $(patsubst %/, %/built-in.o, $(net-y))
574 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
575 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
576 libs-y := $(libs-y1) $(libs-y2)
578 # Build vmlinux
579 # ---------------------------------------------------------------------------
580 # vmlinux is built from the objects selected by $(vmlinux-init) and
581 # $(vmlinux-main). Most are built-in.o files from top-level directories
582 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
583 # Ordering when linking is important, and $(vmlinux-init) must be first.
585 # vmlinux
588 # +-< $(vmlinux-init)
589 # | +--< init/version.o + more
591 # +--< $(vmlinux-main)
592 # | +--< driver/built-in.o mm/built-in.o + more
594 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
596 # vmlinux version (uname -v) cannot be updated during normal
597 # descending-into-subdirs phase since we do not yet know if we need to
598 # update vmlinux.
599 # Therefore this step is delayed until just before final link of vmlinux -
600 # except in the kallsyms case where it is done just before adding the
601 # symbols to the kernel.
603 # System.map is generated to document addresses of all kernel symbols
605 vmlinux-init := $(head-y) $(init-y)
606 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
607 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
608 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
610 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
611 # May be overridden by arch/$(ARCH)/Makefile
612 quiet_cmd_vmlinux__ ?= LD $@
613 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
614 -T $(vmlinux-lds) $(vmlinux-init) \
615 --start-group $(vmlinux-main) --end-group \
616 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
618 # Generate new vmlinux version
619 quiet_cmd_vmlinux_version = GEN .version
620 cmd_vmlinux_version = set -e; \
621 if [ ! -r .version ]; then \
622 rm -f .version; \
623 echo 1 >.version; \
624 else \
625 mv .version .old_version; \
626 expr 0$$(cat .old_version) + 1 >.version; \
627 fi; \
628 $(MAKE) $(build)=init
630 # Generate System.map
631 quiet_cmd_sysmap = SYSMAP
632 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
634 # Link of vmlinux
635 # If CONFIG_KALLSYMS is set .version is already updated
636 # Generate System.map and verify that the content is consistent
637 # Use + in front of the vmlinux_version rule to silent warning with make -j2
638 # First command is ':' to allow us to use + in front of the rule
639 define rule_vmlinux__
641 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
643 $(call cmd,vmlinux__)
644 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
646 $(Q)$(if $($(quiet)cmd_sysmap), \
647 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
648 $(cmd_sysmap) $@ System.map; \
649 if [ $$? -ne 0 ]; then \
650 rm -f $@; \
651 /bin/false; \
653 $(verify_kallsyms)
654 endef
657 ifdef CONFIG_KALLSYMS
658 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
659 # It's a three stage process:
660 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
661 # empty
662 # Running kallsyms on that gives us .tmp_kallsyms1.o with
663 # the right size - vmlinux version (uname -v) is updated during this step
664 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
665 # but due to the added section, some addresses have shifted.
666 # From here, we generate a correct .tmp_kallsyms2.o
667 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
668 # o Verify that the System.map from vmlinux matches the map from
669 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
670 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
671 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
672 # temporary bypass to allow the kernel to be built while the
673 # maintainers work out what went wrong with kallsyms.
675 ifdef CONFIG_KALLSYMS_EXTRA_PASS
676 last_kallsyms := 3
677 else
678 last_kallsyms := 2
679 endif
681 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
683 define verify_kallsyms
684 $(Q)$(if $($(quiet)cmd_sysmap), \
685 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
686 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
687 $(Q)cmp -s System.map .tmp_System.map || \
688 (echo Inconsistent kallsyms data; \
689 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
690 rm .tmp_kallsyms* ; /bin/false )
691 endef
693 # Update vmlinux version before link
694 # Use + in front of this rule to silent warning about make -j1
695 # First command is ':' to allow us to use + in front of this rule
696 cmd_ksym_ld = $(cmd_vmlinux__)
697 define rule_ksym_ld
699 +$(call cmd,vmlinux_version)
700 $(call cmd,vmlinux__)
701 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
702 endef
704 # Generate .S file with all kernel symbols
705 quiet_cmd_kallsyms = KSYM $@
706 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
707 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
709 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
710 $(call if_changed_dep,as_o_S)
712 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
713 $(call cmd,kallsyms)
715 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
716 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
717 $(call if_changed_rule,ksym_ld)
719 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
720 $(call if_changed,vmlinux__)
722 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
723 $(call if_changed,vmlinux__)
725 # Needs to visit scripts/ before $(KALLSYMS) can be used.
726 $(KALLSYMS): scripts ;
728 # Generate some data for debugging strange kallsyms problems
729 debug_kallsyms: .tmp_map$(last_kallsyms)
731 .tmp_map%: .tmp_vmlinux% FORCE
732 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
734 .tmp_map3: .tmp_map2
736 .tmp_map2: .tmp_map1
738 endif # ifdef CONFIG_KALLSYMS
740 # vmlinux image - including updated kernel symbols
741 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
742 ifdef CONFIG_HEADERS_CHECK
743 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
744 endif
745 $(call if_changed_rule,vmlinux__)
746 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
747 $(Q)rm -f .old_version
749 # The actual objects are generated when descending,
750 # make sure no implicit rule kicks in
751 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
753 # Handle descending into subdirectories listed in $(vmlinux-dirs)
754 # Preset locale variables to speed up the build process. Limit locale
755 # tweaks to this spot to avoid wrong language settings when running
756 # make menuconfig etc.
757 # Error messages still appears in the original language
759 PHONY += $(vmlinux-dirs)
760 $(vmlinux-dirs): prepare scripts
761 $(Q)$(MAKE) $(build)=$@
763 # Build the kernel release string
765 # The KERNELRELEASE value built here is stored in the file
766 # include/config/kernel.release, and is used when executing several
767 # make targets, such as "make install" or "make modules_install."
769 # The eventual kernel release string consists of the following fields,
770 # shown in a hierarchical format to show how smaller parts are concatenated
771 # to form the larger and final value, with values coming from places like
772 # the Makefile, kernel config options, make command line options and/or
773 # SCM tag information.
775 # $(KERNELVERSION)
776 # $(VERSION) eg, 2
777 # $(PATCHLEVEL) eg, 6
778 # $(SUBLEVEL) eg, 18
779 # $(EXTRAVERSION) eg, -rc6
780 # $(localver-full)
781 # $(localver)
782 # localversion* (all localversion* files)
783 # $(CONFIG_LOCALVERSION) (from kernel config setting)
784 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
785 # ./scripts/setlocalversion (SCM tag, if one exists)
786 # $(LOCALVERSION) (from make command line if provided)
788 # Note how the final $(localver-auto) string is included *only* if the
789 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
790 # moment, only git is supported but other SCMs can edit the script
791 # scripts/setlocalversion and add the appropriate checks as needed.
793 nullstring :=
794 space := $(nullstring) # end of line
796 ___localver = $(objtree)/localversion* $(srctree)/localversion*
797 __localver = $(sort $(wildcard $(___localver)))
798 # skip backup files (containing '~')
799 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
801 localver = $(subst $(space),, \
802 $(shell cat /dev/null $(_localver)) \
803 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
805 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
806 # and if the SCM is know a tag from the SCM is appended.
807 # The appended tag is determined by the SCM used.
809 # Currently, only git is supported.
810 # Other SCMs can edit scripts/setlocalversion and add the appropriate
811 # checks as needed.
812 ifdef CONFIG_LOCALVERSION_AUTO
813 _localver-auto = $(shell $(CONFIG_SHELL) \
814 $(srctree)/scripts/setlocalversion $(srctree))
815 localver-auto = $(LOCALVERSION)$(_localver-auto)
816 endif
818 localver-full = $(localver)$(localver-auto)
820 # Store (new) KERNELRELASE string in include/config/kernel.release
821 kernelrelease = $(KERNELVERSION)$(localver-full)
822 include/config/kernel.release: include/config/auto.conf FORCE
823 $(Q)rm -f $@
824 $(Q)echo $(kernelrelease) > $@
827 # Things we need to do before we recursively start building the kernel
828 # or the modules are listed in "prepare".
829 # A multi level approach is used. prepareN is processed before prepareN-1.
830 # archprepare is used in arch Makefiles and when processed asm symlink,
831 # version.h and scripts_basic is processed / created.
833 # Listed in dependency order
834 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
836 # prepare-all is deprecated, use prepare as valid replacement
837 PHONY += prepare-all
839 # prepare3 is used to check if we are building in a separate output directory,
840 # and if so do:
841 # 1) Check that make has not been executed in the kernel src $(srctree)
842 # 2) Create the include2 directory, used for the second asm symlink
843 prepare3: include/config/kernel.release
844 ifneq ($(KBUILD_SRC),)
845 @echo ' Using $(srctree) as source for kernel'
846 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
847 echo " $(srctree) is not clean, please run 'make mrproper'";\
848 echo " in the '$(srctree)' directory.";\
849 /bin/false; \
851 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
852 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
853 endif
855 # prepare2 creates a makefile if using a separate output directory
856 prepare2: prepare3 outputmakefile
858 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
859 include/asm include/config/auto.conf
860 ifneq ($(KBUILD_MODULES),)
861 $(Q)mkdir -p $(MODVERDIR)
862 $(Q)rm -f $(MODVERDIR)/*
863 endif
865 archprepare: prepare1 scripts_basic
867 prepare0: archprepare FORCE
868 $(Q)$(MAKE) $(build)=.
870 # All the preparing..
871 prepare prepare-all: prepare0
873 # Leave this as default for preprocessing vmlinux.lds.S, which is now
874 # done in arch/$(ARCH)/kernel/Makefile
876 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
878 # FIXME: The asm symlink changes when $(ARCH) changes. That's
879 # hard to detect, but I suppose "make mrproper" is a good idea
880 # before switching between archs anyway.
882 include/asm:
883 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
884 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
885 @ln -fsn asm-$(ARCH) $@
887 # Generate some files
888 # ---------------------------------------------------------------------------
890 # KERNELRELEASE can change from a few different places, meaning version.h
891 # needs to be updated, so this check is forced on all builds
893 uts_len := 64
894 define filechk_utsrelease.h
895 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
896 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
897 exit 1; \
898 fi; \
899 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
900 endef
902 define filechk_version.h
903 (echo \#define LINUX_VERSION_CODE $(shell \
904 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
905 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
906 endef
908 include/linux/version.h: $(srctree)/Makefile FORCE
909 $(call filechk,version.h)
911 include/linux/utsrelease.h: include/config/kernel.release FORCE
912 $(call filechk,utsrelease.h)
914 # ---------------------------------------------------------------------------
916 PHONY += depend dep
917 depend dep:
918 @echo '*** Warning: make $@ is unnecessary now.'
920 # ---------------------------------------------------------------------------
921 # Kernel headers
922 INSTALL_HDR_PATH=$(objtree)/usr
923 export INSTALL_HDR_PATH
925 HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
927 PHONY += headers_install_all
928 headers_install_all: include/linux/version.h scripts_basic FORCE
929 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
930 $(Q)for arch in $(HDRARCHES); do \
931 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
932 done
934 PHONY += headers_install
935 headers_install: include/linux/version.h scripts_basic FORCE
936 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \
937 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
938 exit 1 ; fi
939 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
940 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include
942 PHONY += headers_check
943 headers_check: headers_install
944 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
946 # ---------------------------------------------------------------------------
947 # Modules
949 ifdef CONFIG_MODULES
951 # By default, build modules as well
953 all: modules
955 # Build modules
957 PHONY += modules
958 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
959 @echo ' Building modules, stage 2.';
960 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
963 # Target to prepare building external modules
964 PHONY += modules_prepare
965 modules_prepare: prepare scripts
967 # Target to install modules
968 PHONY += modules_install
969 modules_install: _modinst_ _modinst_post
971 PHONY += _modinst_
972 _modinst_:
973 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
974 echo "Warning: you may need to install module-init-tools"; \
975 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
976 sleep 1; \
978 @rm -rf $(MODLIB)/kernel
979 @rm -f $(MODLIB)/source
980 @mkdir -p $(MODLIB)/kernel
981 @ln -s $(srctree) $(MODLIB)/source
982 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
983 rm -f $(MODLIB)/build ; \
984 ln -s $(objtree) $(MODLIB)/build ; \
986 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
988 # If System.map exists, run depmod. This deliberately does not have a
989 # dependency on System.map since that would run the dependency tree on
990 # vmlinux. This depmod is only for convenience to give the initial
991 # boot a modules.dep even before / is mounted read-write. However the
992 # boot script depmod is the master version.
993 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
994 depmod_opts :=
995 else
996 depmod_opts := -b $(INSTALL_MOD_PATH) -r
997 endif
998 PHONY += _modinst_post
999 _modinst_post: _modinst_
1000 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
1002 else # CONFIG_MODULES
1004 # Modules not configured
1005 # ---------------------------------------------------------------------------
1007 modules modules_install: FORCE
1008 @echo
1009 @echo "The present kernel configuration has modules disabled."
1010 @echo "Type 'make config' and enable loadable module support."
1011 @echo "Then build a kernel with module support enabled."
1012 @echo
1013 @exit 1
1015 endif # CONFIG_MODULES
1018 # Cleaning is done on three levels.
1019 # make clean Delete most generated files
1020 # Leave enough to build external modules
1021 # make mrproper Delete the current configuration, and all generated files
1022 # make distclean Remove editor backup files, patch leftover files and the like
1024 # Directories & files removed with 'make clean'
1025 CLEAN_DIRS += $(MODVERDIR)
1026 CLEAN_FILES += vmlinux System.map \
1027 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1029 # Directories & files removed with 'make mrproper'
1030 MRPROPER_DIRS += include/config include2 usr/include
1031 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1032 include/linux/autoconf.h include/linux/version.h \
1033 include/linux/utsrelease.h \
1034 Module.symvers tags TAGS cscope*
1036 # clean - Delete most, but leave enough to build external modules
1038 clean: rm-dirs := $(CLEAN_DIRS)
1039 clean: rm-files := $(CLEAN_FILES)
1040 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1042 PHONY += $(clean-dirs) clean archclean
1043 $(clean-dirs):
1044 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1046 clean: archclean $(clean-dirs)
1047 $(call cmd,rmdirs)
1048 $(call cmd,rmfiles)
1049 @find . $(RCS_FIND_IGNORE) \
1050 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1051 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1052 -o -name '*.symtypes' \) \
1053 -type f -print | xargs rm -f
1055 # mrproper - Delete all generated files, including .config
1057 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1058 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1059 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1061 PHONY += $(mrproper-dirs) mrproper archmrproper
1062 $(mrproper-dirs):
1063 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1065 mrproper: clean archmrproper $(mrproper-dirs)
1066 $(call cmd,rmdirs)
1067 $(call cmd,rmfiles)
1069 # distclean
1071 PHONY += distclean
1073 distclean: mrproper
1074 @find $(srctree) $(RCS_FIND_IGNORE) \
1075 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1076 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1077 -o -name '.*.rej' -o -size 0 \
1078 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1079 -type f -print | xargs rm -f
1082 # Packaging of the kernel to various formats
1083 # ---------------------------------------------------------------------------
1084 # rpm target kept for backward compatibility
1085 package-dir := $(srctree)/scripts/package
1087 %pkg: include/config/kernel.release FORCE
1088 $(Q)$(MAKE) $(build)=$(package-dir) $@
1089 rpm: include/config/kernel.release FORCE
1090 $(Q)$(MAKE) $(build)=$(package-dir) $@
1093 # Brief documentation of the typical targets used
1094 # ---------------------------------------------------------------------------
1096 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1097 boards := $(notdir $(boards))
1099 help:
1100 @echo 'Cleaning targets:'
1101 @echo ' clean - remove most generated files but keep the config and'
1102 @echo ' enough build support to build external modules'
1103 @echo ' mrproper - remove all generated files + config + various backup files'
1104 @echo ' distclean - mrproper + remove editor backup and patch files'
1105 @echo ''
1106 @echo 'Configuration targets:'
1107 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1108 @echo ''
1109 @echo 'Other generic targets:'
1110 @echo ' all - Build all targets marked with [*]'
1111 @echo '* vmlinux - Build the bare kernel'
1112 @echo '* modules - Build all modules'
1113 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1114 @echo ' dir/ - Build all files in dir and below'
1115 @echo ' dir/file.[ois] - Build specified target only'
1116 @echo ' dir/file.ko - Build module including final link'
1117 @echo ' rpm - Build a kernel as an RPM package'
1118 @echo ' tags/TAGS - Generate tags file for editors'
1119 @echo ' cscope - Generate cscope index'
1120 @echo ' kernelrelease - Output the release version string'
1121 @echo ' kernelversion - Output the version stored in Makefile'
1122 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1123 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1125 @echo ' (default: $(INSTALL_HDR_PATH))'
1126 @echo ''
1127 @echo 'Static analysers'
1128 @echo ' checkstack - Generate a list of stack hogs'
1129 @echo ' namespacecheck - Name space analysis on compiled kernel'
1130 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1131 echo ' headers_check - Sanity check on exported headers'; \
1133 @echo ''
1134 @echo 'Kernel packaging:'
1135 @$(MAKE) $(build)=$(package-dir) help
1136 @echo ''
1137 @echo 'Documentation targets:'
1138 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1139 @echo ''
1140 @echo 'Architecture specific targets ($(ARCH)):'
1141 @$(if $(archhelp),$(archhelp),\
1142 echo ' No architecture specific help defined for $(ARCH)')
1143 @echo ''
1144 @$(if $(boards), \
1145 $(foreach b, $(boards), \
1146 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1147 echo '')
1149 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1150 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1151 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1152 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1153 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1154 @echo ''
1155 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1156 @echo 'For further info see the ./README file'
1159 # Documentation targets
1160 # ---------------------------------------------------------------------------
1161 %docs: scripts_basic FORCE
1162 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1164 else # KBUILD_EXTMOD
1167 # External module support.
1168 # When building external modules the kernel used as basis is considered
1169 # read-only, and no consistency checks are made and the make
1170 # system is not used on the basis kernel. If updates are required
1171 # in the basis kernel ordinary make commands (without M=...) must
1172 # be used.
1174 # The following are the only valid targets when building external
1175 # modules.
1176 # make M=dir clean Delete all automatically generated files
1177 # make M=dir modules Make all modules in specified dir
1178 # make M=dir Same as 'make M=dir modules'
1179 # make M=dir modules_install
1180 # Install the modules built in the module directory
1181 # Assumes install directory is already created
1183 # We are always building modules
1184 KBUILD_MODULES := 1
1185 PHONY += crmodverdir
1186 crmodverdir:
1187 $(Q)mkdir -p $(MODVERDIR)
1188 $(Q)rm -f $(MODVERDIR)/*
1190 PHONY += $(objtree)/Module.symvers
1191 $(objtree)/Module.symvers:
1192 @test -e $(objtree)/Module.symvers || ( \
1193 echo; \
1194 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1195 echo " is missing; modules will have no dependencies and modversions."; \
1196 echo )
1198 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1199 PHONY += $(module-dirs) modules
1200 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1201 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1203 modules: $(module-dirs)
1204 @echo ' Building modules, stage 2.';
1205 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1207 PHONY += modules_install
1208 modules_install: _emodinst_ _emodinst_post
1210 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1211 PHONY += _emodinst_
1212 _emodinst_:
1213 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1214 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1216 # Run depmod only is we have System.map and depmod is executable
1217 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1218 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1219 $(DEPMOD) -ae -F System.map \
1220 $(if $(strip $(INSTALL_MOD_PATH)), \
1221 -b $(INSTALL_MOD_PATH) -r) \
1222 $(KERNELRELEASE); \
1225 PHONY += _emodinst_post
1226 _emodinst_post: _emodinst_
1227 $(call cmd,depmod)
1229 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1231 PHONY += $(clean-dirs) clean
1232 $(clean-dirs):
1233 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1235 clean: rm-dirs := $(MODVERDIR)
1236 clean: $(clean-dirs)
1237 $(call cmd,rmdirs)
1238 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1239 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1240 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1241 -type f -print | xargs rm -f
1243 help:
1244 @echo ' Building external modules.'
1245 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1246 @echo ''
1247 @echo ' modules - default target, build the module(s)'
1248 @echo ' modules_install - install the module'
1249 @echo ' clean - remove generated files in module directory only'
1250 @echo ''
1252 # Dummies...
1253 PHONY += prepare scripts
1254 prepare: ;
1255 scripts: ;
1256 endif # KBUILD_EXTMOD
1258 # Generate tags for editors
1259 # ---------------------------------------------------------------------------
1261 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1262 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1263 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1265 ifeq ($(src),$(obj))
1266 __srctree =
1267 else
1268 __srctree = $(srctree)/
1269 endif
1271 ifeq ($(ALLSOURCE_ARCHS),)
1272 ifeq ($(ARCH),um)
1273 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1274 else
1275 ALLINCLUDE_ARCHS := $(ARCH)
1276 endif
1277 else
1278 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1279 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1280 endif
1282 ALLSOURCE_ARCHS := $(ARCH)
1284 define find-sources
1285 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1286 \( -name include -o -name arch \) -prune -o \
1287 -name $1 -print; \
1288 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1289 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1290 -name $1 -print; \
1291 done ; \
1292 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1293 -name $1 -print; \
1294 find $(__srctree)include $(RCS_FIND_IGNORE) \
1295 \( -name config -o -name 'asm-*' \) -prune \
1296 -o -name $1 -print; \
1297 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1298 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1299 -name $1 -print; \
1300 done ; \
1301 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1302 -name $1 -print )
1303 endef
1305 define all-sources
1306 $(call find-sources,'*.[chS]')
1307 endef
1308 define all-kconfigs
1309 $(call find-sources,'Kconfig*')
1310 endef
1311 define all-defconfigs
1312 $(call find-sources,'defconfig')
1313 endef
1315 define xtags
1316 if $1 --version 2>&1 | grep -iq exuberant; then \
1317 $(all-sources) | xargs $1 -a \
1318 -I __initdata,__exitdata,__acquires,__releases \
1319 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1320 --extra=+f --c-kinds=+px \
1321 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \
1322 $(all-kconfigs) | xargs $1 -a \
1323 --langdef=kconfig \
1324 --language-force=kconfig \
1325 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
1326 $(all-defconfigs) | xargs -r $1 -a \
1327 --langdef=dotconfig \
1328 --language-force=dotconfig \
1329 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1330 elif $1 --version 2>&1 | grep -iq emacs; then \
1331 $(all-sources) | xargs $1 -a; \
1332 $(all-kconfigs) | xargs $1 -a \
1333 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1334 $(all-defconfigs) | xargs -r $1 -a \
1335 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1336 else \
1337 $(all-sources) | xargs $1 -a; \
1339 endef
1341 quiet_cmd_cscope-file = FILELST cscope.files
1342 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1344 quiet_cmd_cscope = MAKE cscope.out
1345 cmd_cscope = cscope -b
1347 cscope: FORCE
1348 $(call cmd,cscope-file)
1349 $(call cmd,cscope)
1351 quiet_cmd_TAGS = MAKE $@
1352 define cmd_TAGS
1353 rm -f $@; \
1354 $(call xtags,etags)
1355 endef
1357 TAGS: FORCE
1358 $(call cmd,TAGS)
1360 quiet_cmd_tags = MAKE $@
1361 define cmd_tags
1362 rm -f $@; \
1363 $(call xtags,ctags)
1364 endef
1366 tags: FORCE
1367 $(call cmd,tags)
1370 # Scripts to check various things for consistency
1371 # ---------------------------------------------------------------------------
1373 includecheck:
1374 find * $(RCS_FIND_IGNORE) \
1375 -name '*.[hcS]' -type f -print | sort \
1376 | xargs $(PERL) -w scripts/checkincludes.pl
1378 versioncheck:
1379 find * $(RCS_FIND_IGNORE) \
1380 -name '*.[hcS]' -type f -print | sort \
1381 | xargs $(PERL) -w scripts/checkversion.pl
1383 namespacecheck:
1384 $(PERL) $(srctree)/scripts/namespace.pl
1386 endif #ifeq ($(config-targets),1)
1387 endif #ifeq ($(mixed-targets),1)
1389 PHONY += checkstack kernelrelease kernelversion
1391 # Use $(SUBARCH) here instead of $(ARCH) so that this works for UML.
1392 # In the UML case, $(SUBARCH) is the name of the underlying
1393 # architecture, while for all other arches, it is the same as $(ARCH).
1394 checkstack:
1395 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1396 $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH)
1398 kernelrelease:
1399 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1400 $(error kernelrelease not valid - run 'make prepare' to update it))
1401 kernelversion:
1402 @echo $(KERNELVERSION)
1404 # Single targets
1405 # ---------------------------------------------------------------------------
1406 # Single targets are compatible with:
1407 # - build whith mixed source and output
1408 # - build with separate output dir 'make O=...'
1409 # - external modules
1411 # target-dir => where to store outputfile
1412 # build-dir => directory in kernel source tree to use
1414 ifeq ($(KBUILD_EXTMOD),)
1415 build-dir = $(patsubst %/,%,$(dir $@))
1416 target-dir = $(dir $@)
1417 else
1418 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1419 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1420 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1421 endif
1423 %.s: %.c prepare scripts FORCE
1424 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1425 %.i: %.c prepare scripts FORCE
1426 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1427 %.o: %.c prepare scripts FORCE
1428 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1429 %.lst: %.c prepare scripts FORCE
1430 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1431 %.s: %.S prepare scripts FORCE
1432 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1433 %.o: %.S prepare scripts FORCE
1434 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1435 %.symtypes: %.c prepare scripts FORCE
1436 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1438 # Modules
1439 / %/: prepare scripts FORCE
1440 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1441 $(build)=$(build-dir)
1442 %.ko: prepare scripts FORCE
1443 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1444 $(build)=$(build-dir) $(@:.ko=.o)
1445 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1447 # FIXME Should go into a make.lib or something
1448 # ===========================================================================
1450 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1451 cmd_rmdirs = rm -rf $(rm-dirs)
1453 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1454 cmd_rmfiles = rm -f $(rm-files)
1457 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1458 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1459 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1461 quiet_cmd_as_o_S = AS $@
1462 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1464 # read all saved command lines
1466 targets := $(wildcard $(sort $(targets)))
1467 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1469 ifneq ($(cmd_files),)
1470 $(cmd_files): ; # Do not try to update included dependency files
1471 include $(cmd_files)
1472 endif
1474 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1475 # Usage:
1476 # $(Q)$(MAKE) $(clean)=dir
1477 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1479 endif # skip-makefile
1481 PHONY += FORCE
1482 FORCE:
1485 # Declare the contents of the .PHONY variable as phony. We keep that
1486 # information in a variable se we can use it in if_changed and friends.
1487 .PHONY: $(PHONY)