netfilter: xt_recent: fix regression in rules using a zero hit_count
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / Makefile
bloba5ba759e0fd5ff1cff5edf2244997306535bf1af
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 34
4 EXTRAVERSION = -rc2
5 NAME = Man-Eating Seals of Antiquity
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 avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # Avoid funny character set dependencies
20 unexport LC_ALL
21 LC_COLLATE=C
22 LC_NUMERIC=C
23 export LC_COLLATE LC_NUMERIC
25 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right.
28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which is in that other dir
34 # is now up to date.
36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicitly listed as the
39 # prepare rule.
41 # To put more focus on warnings, be less verbose as default
42 # Use 'make V=1' to see the full commands
44 ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
46 endif
47 ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49 endif
51 # Call a source code checker (by default, "sparse") as part of the
52 # C compilation.
54 # Use 'make C=1' to enable checking of only re-compiled files.
55 # Use 'make C=2' to enable checking of *all* source files, regardless
56 # of whether they are re-compiled or not.
58 # See the file "Documentation/sparse.txt" for more details, including
59 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
63 endif
64 ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66 endif
68 # Use make M=dir to specify directory of external module to build
69 # Old syntax make ... SUBDIRS=$PWD is still supported
70 # Setting the environment variable KBUILD_EXTMOD take precedence
71 ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73 endif
75 ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77 endif
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
82 # 1) O=
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
89 # make
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # variable.
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
97 ifeq ($(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 ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
103 endif
105 # That's our default target when none is given on the command line
106 PHONY := _all
107 _all:
109 # Cancel implicit rules on top Makefile
110 $(CURDIR)/Makefile Makefile: ;
112 ifneq ($(KBUILD_OUTPUT),)
113 # Invoke a second make in the output directory, passing relevant variables
114 # check that the output directory actually exists
115 saved-output := $(KBUILD_OUTPUT)
116 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
117 $(if $(KBUILD_OUTPUT),, \
118 $(error output directory "$(saved-output)" does not exist))
120 PHONY += $(MAKECMDGOALS) sub-make
122 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
123 $(Q)@:
125 sub-make: FORCE
126 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
127 KBUILD_SRC=$(CURDIR) \
128 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
129 $(filter-out _all sub-make,$(MAKECMDGOALS))
131 # Leave processing to above invocation of make
132 skip-makefile := 1
133 endif # ifneq ($(KBUILD_OUTPUT),)
134 endif # ifeq ($(KBUILD_SRC),)
136 # We process the rest of the Makefile if this is the final invocation of make
137 ifeq ($(skip-makefile),)
139 # If building an external module we do not care about the all: rule
140 # but instead _all depend on modules
141 PHONY += all
142 ifeq ($(KBUILD_EXTMOD),)
143 _all: all
144 else
145 _all: modules
146 endif
148 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
149 objtree := $(CURDIR)
150 src := $(srctree)
151 obj := $(objtree)
153 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
155 export srctree objtree VPATH
158 # SUBARCH tells the usermode build what the underlying arch is. That is set
159 # first, and if a usermode build is happening, the "ARCH=um" on the command
160 # line overrides the setting of ARCH below. If a native build is happening,
161 # then ARCH is assigned, getting whatever value it gets normally, and
162 # SUBARCH is subsequently ignored.
164 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
165 -e s/arm.*/arm/ -e s/sa110/arm/ \
166 -e s/s390x/s390/ -e s/parisc64/parisc/ \
167 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
168 -e s/sh[234].*/sh/ )
170 # Cross compiling and selecting different set of gcc/bin-utils
171 # ---------------------------------------------------------------------------
173 # When performing cross compilation for other architectures ARCH shall be set
174 # to the target architecture. (See arch/* for the possibilities).
175 # ARCH can be set during invocation of make:
176 # make ARCH=ia64
177 # Another way is to have ARCH set in the environment.
178 # The default ARCH is the host where make is executed.
180 # CROSS_COMPILE specify the prefix used for all executables used
181 # during compilation. Only gcc and related bin-utils executables
182 # are prefixed with $(CROSS_COMPILE).
183 # CROSS_COMPILE can be set on the command line
184 # make CROSS_COMPILE=ia64-linux-
185 # Alternatively CROSS_COMPILE can be set in the environment.
186 # Default value for CROSS_COMPILE is not to prefix executables
187 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
188 export KBUILD_BUILDHOST := $(SUBARCH)
189 ARCH ?= $(SUBARCH)
190 CROSS_COMPILE ?=
192 # Architecture as present in compile.h
193 UTS_MACHINE := $(ARCH)
194 SRCARCH := $(ARCH)
196 # Additional ARCH settings for x86
197 ifeq ($(ARCH),i386)
198 SRCARCH := x86
199 endif
200 ifeq ($(ARCH),x86_64)
201 SRCARCH := x86
202 endif
204 # Additional ARCH settings for sparc
205 ifeq ($(ARCH),sparc64)
206 SRCARCH := sparc
207 endif
209 # Additional ARCH settings for sh
210 ifeq ($(ARCH),sh64)
211 SRCARCH := sh
212 endif
214 # Where to locate arch specific headers
215 hdr-arch := $(SRCARCH)
217 ifeq ($(ARCH),m68knommu)
218 hdr-arch := m68k
219 endif
221 KCONFIG_CONFIG ?= .config
223 # SHELL used by kbuild
224 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
225 else if [ -x /bin/bash ]; then echo /bin/bash; \
226 else echo sh; fi ; fi)
228 HOSTCC = gcc
229 HOSTCXX = g++
230 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
231 HOSTCXXFLAGS = -O2
233 # Decide whether to build built-in, modular, or both.
234 # Normally, just do built-in.
236 KBUILD_MODULES :=
237 KBUILD_BUILTIN := 1
239 # If we have only "make modules", don't compile built-in objects.
240 # When we're building modules with modversions, we need to consider
241 # the built-in objects during the descend as well, in order to
242 # make sure the checksums are up to date before we record them.
244 ifeq ($(MAKECMDGOALS),modules)
245 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
246 endif
248 # If we have "make <whatever> modules", compile modules
249 # in addition to whatever we do anyway.
250 # Just "make" or "make all" shall build modules as well
252 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
253 KBUILD_MODULES := 1
254 endif
256 ifeq ($(MAKECMDGOALS),)
257 KBUILD_MODULES := 1
258 endif
260 export KBUILD_MODULES KBUILD_BUILTIN
261 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
263 # Beautify output
264 # ---------------------------------------------------------------------------
266 # Normally, we echo the whole command before executing it. By making
267 # that echo $($(quiet)$(cmd)), we now have the possibility to set
268 # $(quiet) to choose other forms of output instead, e.g.
270 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
271 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
273 # If $(quiet) is empty, the whole command will be printed.
274 # If it is set to "quiet_", only the short version will be printed.
275 # If it is set to "silent_", nothing will be printed at all, since
276 # the variable $(silent_cmd_cc_o_c) doesn't exist.
278 # A simple variant is to prefix commands with $(Q) - that's useful
279 # for commands that shall be hidden in non-verbose mode.
281 # $(Q)ln $@ :<
283 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
284 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
286 ifeq ($(KBUILD_VERBOSE),1)
287 quiet =
289 else
290 quiet=quiet_
291 Q = @
292 endif
294 # If the user is running make -s (silent mode), suppress echoing of
295 # commands
297 ifneq ($(findstring s,$(MAKEFLAGS)),)
298 quiet=silent_
299 endif
301 export quiet Q KBUILD_VERBOSE
304 # Look for make include files relative to root of kernel src
305 MAKEFLAGS += --include-dir=$(srctree)
307 # We need some generic definitions (do not try to remake the file).
308 $(srctree)/scripts/Kbuild.include: ;
309 include $(srctree)/scripts/Kbuild.include
311 # Make variables (CC, etc...)
313 AS = $(CROSS_COMPILE)as
314 LD = $(CROSS_COMPILE)ld
315 CC = $(CROSS_COMPILE)gcc
316 CPP = $(CC) -E
317 AR = $(CROSS_COMPILE)ar
318 NM = $(CROSS_COMPILE)nm
319 STRIP = $(CROSS_COMPILE)strip
320 OBJCOPY = $(CROSS_COMPILE)objcopy
321 OBJDUMP = $(CROSS_COMPILE)objdump
322 AWK = awk
323 GENKSYMS = scripts/genksyms/genksyms
324 INSTALLKERNEL := installkernel
325 DEPMOD = /sbin/depmod
326 KALLSYMS = scripts/kallsyms
327 PERL = perl
328 CHECK = sparse
330 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
331 -Wbitwise -Wno-return-void $(CF)
332 MODFLAGS = -DMODULE
333 CFLAGS_MODULE = $(MODFLAGS)
334 AFLAGS_MODULE = $(MODFLAGS)
335 LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
336 CFLAGS_KERNEL =
337 AFLAGS_KERNEL =
338 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
341 # Use LINUXINCLUDE when you must reference the include/ directory.
342 # Needed to be compatible with the O= option
343 LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
344 $(if $(KBUILD_SRC), -I$(srctree)/include) \
345 -include include/generated/autoconf.h
347 KBUILD_CPPFLAGS := -D__KERNEL__
349 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
350 -fno-strict-aliasing -fno-common \
351 -Werror-implicit-function-declaration \
352 -Wno-format-security \
353 -fno-delete-null-pointer-checks
354 KBUILD_AFLAGS := -D__ASSEMBLY__
356 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
357 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
358 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
360 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
361 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
362 export CPP AR NM STRIP OBJCOPY OBJDUMP
363 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
364 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
366 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
367 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
368 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
370 # When compiling out-of-tree modules, put MODVERDIR in the module
371 # tree rather than in the kernel tree. The kernel tree might
372 # even be read-only.
373 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
375 # Files to ignore in find ... statements
377 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
378 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
380 # ===========================================================================
381 # Rules shared between *config targets and build targets
383 # Basic helpers built in scripts/
384 PHONY += scripts_basic
385 scripts_basic:
386 $(Q)$(MAKE) $(build)=scripts/basic
387 $(Q)rm -f .tmp_quiet_recordmcount
389 # To avoid any implicit rule to kick in, define an empty command.
390 scripts/basic/%: scripts_basic ;
392 PHONY += outputmakefile
393 # outputmakefile generates a Makefile in the output directory, if using a
394 # separate output directory. This allows convenient use of make in the
395 # output directory.
396 outputmakefile:
397 ifneq ($(KBUILD_SRC),)
398 $(Q)ln -fsn $(srctree) source
399 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
400 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
401 endif
403 # To make sure we do not include .config for any of the *config targets
404 # catch them early, and hand them over to scripts/kconfig/Makefile
405 # It is allowed to specify more targets when calling make, including
406 # mixing *config targets and build targets.
407 # For example 'make oldconfig all'.
408 # Detect when mixed targets is specified, and make a second invocation
409 # of make so .config is not included in this case either (for *config).
411 no-dot-config-targets := clean mrproper distclean \
412 cscope TAGS tags help %docs check% \
413 include/linux/version.h headers_% \
414 kernelrelease kernelversion
416 config-targets := 0
417 mixed-targets := 0
418 dot-config := 1
420 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
421 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
422 dot-config := 0
423 endif
424 endif
426 ifeq ($(KBUILD_EXTMOD),)
427 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
428 config-targets := 1
429 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
430 mixed-targets := 1
431 endif
432 endif
433 endif
435 ifeq ($(mixed-targets),1)
436 # ===========================================================================
437 # We're called with mixed targets (*config and build targets).
438 # Handle them one by one.
440 %:: FORCE
441 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
443 else
444 ifeq ($(config-targets),1)
445 # ===========================================================================
446 # *config targets only - make sure prerequisites are updated, and descend
447 # in scripts/kconfig to make the *config target
449 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
450 # KBUILD_DEFCONFIG may point out an alternative default configuration
451 # used for 'make defconfig'
452 include $(srctree)/arch/$(SRCARCH)/Makefile
453 export KBUILD_DEFCONFIG KBUILD_KCONFIG
455 config: scripts_basic outputmakefile FORCE
456 $(Q)mkdir -p include/linux include/config
457 $(Q)$(MAKE) $(build)=scripts/kconfig $@
459 %config: scripts_basic outputmakefile FORCE
460 $(Q)mkdir -p include/linux include/config
461 $(Q)$(MAKE) $(build)=scripts/kconfig $@
463 else
464 # ===========================================================================
465 # Build targets only - this includes vmlinux, arch specific targets, clean
466 # targets and others. In general all targets except *config targets.
468 ifeq ($(KBUILD_EXTMOD),)
469 # Additional helpers built in scripts/
470 # Carefully list dependencies so we do not try to build scripts twice
471 # in parallel
472 PHONY += scripts
473 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
474 $(Q)$(MAKE) $(build)=$(@)
476 # Objects we will link into vmlinux / subdirs we need to visit
477 init-y := init/
478 drivers-y := drivers/ sound/ firmware/
479 net-y := net/
480 libs-y := lib/
481 core-y := usr/
482 endif # KBUILD_EXTMOD
484 ifeq ($(dot-config),1)
485 # Read in config
486 -include include/config/auto.conf
488 ifeq ($(KBUILD_EXTMOD),)
489 # Read in dependencies to all Kconfig* files, make sure to run
490 # oldconfig if changes are detected.
491 -include include/config/auto.conf.cmd
493 # To avoid any implicit rule to kick in, define an empty command
494 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
496 # If .config is newer than include/config/auto.conf, someone tinkered
497 # with it and forgot to run make oldconfig.
498 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
499 # we execute the config step to be sure to catch updated Kconfig files
500 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
501 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
502 else
503 # external modules needs include/generated/autoconf.h and include/config/auto.conf
504 # but do not care if they are up-to-date. Use auto.conf to trigger the test
505 PHONY += include/config/auto.conf
507 include/config/auto.conf:
508 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
509 echo; \
510 echo " ERROR: Kernel configuration is invalid."; \
511 echo " include/generated/autoconf.h or $@ are missing.";\
512 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
513 echo; \
514 /bin/false)
516 endif # KBUILD_EXTMOD
518 else
519 # Dummy target needed, because used as prerequisite
520 include/config/auto.conf: ;
521 endif # $(dot-config)
523 # The all: target is the default when no target is given on the
524 # command line.
525 # This allow a user to issue only 'make' to build a kernel including modules
526 # Defaults vmlinux but it is usually overridden in the arch makefile
527 all: vmlinux
529 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
530 KBUILD_CFLAGS += -Os
531 else
532 KBUILD_CFLAGS += -O2
533 endif
535 include $(srctree)/arch/$(SRCARCH)/Makefile
537 ifneq ($(CONFIG_FRAME_WARN),0)
538 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
539 endif
541 # Force gcc to behave correct even for buggy distributions
542 ifndef CONFIG_CC_STACKPROTECTOR
543 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
544 endif
546 ifdef CONFIG_FRAME_POINTER
547 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
548 else
549 KBUILD_CFLAGS += -fomit-frame-pointer
550 endif
552 ifdef CONFIG_DEBUG_INFO
553 KBUILD_CFLAGS += -g
554 KBUILD_AFLAGS += -gdwarf-2
555 endif
557 ifdef CONFIG_FUNCTION_TRACER
558 KBUILD_CFLAGS += -pg
559 endif
561 # We trigger additional mismatches with less inlining
562 ifdef CONFIG_DEBUG_SECTION_MISMATCH
563 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
564 endif
566 # arch Makefile may override CC so keep this after arch Makefile is included
567 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
568 CHECKFLAGS += $(NOSTDINC_FLAGS)
570 # warn about C99 declaration after statement
571 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
573 # disable pointer signed / unsigned warnings in gcc 4.0
574 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
576 # disable invalid "can't wrap" optimizations for signed / pointers
577 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
579 # revert to pre-gcc-4.4 behaviour of .eh_frame
580 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
582 # conserve stack if available
583 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
585 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
586 # But warn user when we do so
587 warn-assign = \
588 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
590 ifneq ($(KCPPFLAGS),)
591 $(call warn-assign,CPPFLAGS)
592 KBUILD_CPPFLAGS += $(KCPPFLAGS)
593 endif
594 ifneq ($(KAFLAGS),)
595 $(call warn-assign,AFLAGS)
596 KBUILD_AFLAGS += $(KAFLAGS)
597 endif
598 ifneq ($(KCFLAGS),)
599 $(call warn-assign,CFLAGS)
600 KBUILD_CFLAGS += $(KCFLAGS)
601 endif
603 # Use --build-id when available.
604 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
605 $(call cc-ldoption, -Wl$(comma)--build-id,))
606 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
607 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
609 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
610 LDFLAGS_vmlinux += $(call ld-option, -X,)
611 endif
613 # Default kernel image to build when no specific target is given.
614 # KBUILD_IMAGE may be overruled on the command line or
615 # set in the environment
616 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
617 # this default value
618 export KBUILD_IMAGE ?= vmlinux
621 # INSTALL_PATH specifies where to place the updated kernel and system map
622 # images. Default is /boot, but you can set it to other values
623 export INSTALL_PATH ?= /boot
626 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
627 # relocations required by build roots. This is not defined in the
628 # makefile but the argument can be passed to make if needed.
631 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
632 export MODLIB
635 # INSTALL_MOD_STRIP, if defined, will cause modules to be
636 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
637 # the default option --strip-debug will be used. Otherwise,
638 # INSTALL_MOD_STRIP will used as the options to the strip command.
640 ifdef INSTALL_MOD_STRIP
641 ifeq ($(INSTALL_MOD_STRIP),1)
642 mod_strip_cmd = $(STRIP) --strip-debug
643 else
644 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
645 endif # INSTALL_MOD_STRIP=1
646 else
647 mod_strip_cmd = true
648 endif # INSTALL_MOD_STRIP
649 export mod_strip_cmd
652 ifeq ($(KBUILD_EXTMOD),)
653 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
655 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
656 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
657 $(net-y) $(net-m) $(libs-y) $(libs-m)))
659 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
660 $(init-n) $(init-) \
661 $(core-n) $(core-) $(drivers-n) $(drivers-) \
662 $(net-n) $(net-) $(libs-n) $(libs-))))
664 init-y := $(patsubst %/, %/built-in.o, $(init-y))
665 core-y := $(patsubst %/, %/built-in.o, $(core-y))
666 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
667 net-y := $(patsubst %/, %/built-in.o, $(net-y))
668 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
669 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
670 libs-y := $(libs-y1) $(libs-y2)
672 # Build vmlinux
673 # ---------------------------------------------------------------------------
674 # vmlinux is built from the objects selected by $(vmlinux-init) and
675 # $(vmlinux-main). Most are built-in.o files from top-level directories
676 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
677 # Ordering when linking is important, and $(vmlinux-init) must be first.
679 # vmlinux
682 # +-< $(vmlinux-init)
683 # | +--< init/version.o + more
685 # +--< $(vmlinux-main)
686 # | +--< driver/built-in.o mm/built-in.o + more
688 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
690 # vmlinux version (uname -v) cannot be updated during normal
691 # descending-into-subdirs phase since we do not yet know if we need to
692 # update vmlinux.
693 # Therefore this step is delayed until just before final link of vmlinux -
694 # except in the kallsyms case where it is done just before adding the
695 # symbols to the kernel.
697 # System.map is generated to document addresses of all kernel symbols
699 vmlinux-init := $(head-y) $(init-y)
700 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
701 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
702 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
703 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
705 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
706 # May be overridden by arch/$(ARCH)/Makefile
707 quiet_cmd_vmlinux__ ?= LD $@
708 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
709 -T $(vmlinux-lds) $(vmlinux-init) \
710 --start-group $(vmlinux-main) --end-group \
711 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
713 # Generate new vmlinux version
714 quiet_cmd_vmlinux_version = GEN .version
715 cmd_vmlinux_version = set -e; \
716 if [ ! -r .version ]; then \
717 rm -f .version; \
718 echo 1 >.version; \
719 else \
720 mv .version .old_version; \
721 expr 0$$(cat .old_version) + 1 >.version; \
722 fi; \
723 $(MAKE) $(build)=init
725 # Generate System.map
726 quiet_cmd_sysmap = SYSMAP
727 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
729 # Link of vmlinux
730 # If CONFIG_KALLSYMS is set .version is already updated
731 # Generate System.map and verify that the content is consistent
732 # Use + in front of the vmlinux_version rule to silent warning with make -j2
733 # First command is ':' to allow us to use + in front of the rule
734 define rule_vmlinux__
736 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
738 $(call cmd,vmlinux__)
739 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
741 $(Q)$(if $($(quiet)cmd_sysmap), \
742 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
743 $(cmd_sysmap) $@ System.map; \
744 if [ $$? -ne 0 ]; then \
745 rm -f $@; \
746 /bin/false; \
748 $(verify_kallsyms)
749 endef
752 ifdef CONFIG_KALLSYMS
753 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
754 # It's a three stage process:
755 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
756 # empty
757 # Running kallsyms on that gives us .tmp_kallsyms1.o with
758 # the right size - vmlinux version (uname -v) is updated during this step
759 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
760 # but due to the added section, some addresses have shifted.
761 # From here, we generate a correct .tmp_kallsyms2.o
762 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
763 # o Verify that the System.map from vmlinux matches the map from
764 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
765 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
766 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
767 # temporary bypass to allow the kernel to be built while the
768 # maintainers work out what went wrong with kallsyms.
770 ifdef CONFIG_KALLSYMS_EXTRA_PASS
771 last_kallsyms := 3
772 else
773 last_kallsyms := 2
774 endif
776 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
778 define verify_kallsyms
779 $(Q)$(if $($(quiet)cmd_sysmap), \
780 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
781 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
782 $(Q)cmp -s System.map .tmp_System.map || \
783 (echo Inconsistent kallsyms data; \
784 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
785 rm .tmp_kallsyms* ; /bin/false )
786 endef
788 # Update vmlinux version before link
789 # Use + in front of this rule to silent warning about make -j1
790 # First command is ':' to allow us to use + in front of this rule
791 cmd_ksym_ld = $(cmd_vmlinux__)
792 define rule_ksym_ld
794 +$(call cmd,vmlinux_version)
795 $(call cmd,vmlinux__)
796 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
797 endef
799 # Generate .S file with all kernel symbols
800 quiet_cmd_kallsyms = KSYM $@
801 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
802 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
804 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
805 $(call if_changed_dep,as_o_S)
807 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
808 $(call cmd,kallsyms)
810 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
811 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
812 $(call if_changed_rule,ksym_ld)
814 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
815 $(call if_changed,vmlinux__)
817 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
818 $(call if_changed,vmlinux__)
820 # Needs to visit scripts/ before $(KALLSYMS) can be used.
821 $(KALLSYMS): scripts ;
823 # Generate some data for debugging strange kallsyms problems
824 debug_kallsyms: .tmp_map$(last_kallsyms)
826 .tmp_map%: .tmp_vmlinux% FORCE
827 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
829 .tmp_map3: .tmp_map2
831 .tmp_map2: .tmp_map1
833 endif # ifdef CONFIG_KALLSYMS
835 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
836 # relevant sections renamed as per the linker script.
837 quiet_cmd_vmlinux-modpost = LD $@
838 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
839 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
840 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
841 define rule_vmlinux-modpost
843 +$(call cmd,vmlinux-modpost)
844 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
845 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
846 endef
848 # vmlinux image - including updated kernel symbols
849 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
850 ifdef CONFIG_HEADERS_CHECK
851 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
852 endif
853 ifdef CONFIG_SAMPLES
854 $(Q)$(MAKE) $(build)=samples
855 endif
856 ifdef CONFIG_BUILD_DOCSRC
857 $(Q)$(MAKE) $(build)=Documentation
858 endif
859 $(call vmlinux-modpost)
860 $(call if_changed_rule,vmlinux__)
861 $(Q)rm -f .old_version
863 # build vmlinux.o first to catch section mismatch errors early
864 ifdef CONFIG_KALLSYMS
865 .tmp_vmlinux1: vmlinux.o
866 endif
868 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
869 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
870 $(call if_changed_rule,vmlinux-modpost)
872 # The actual objects are generated when descending,
873 # make sure no implicit rule kicks in
874 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
876 # Handle descending into subdirectories listed in $(vmlinux-dirs)
877 # Preset locale variables to speed up the build process. Limit locale
878 # tweaks to this spot to avoid wrong language settings when running
879 # make menuconfig etc.
880 # Error messages still appears in the original language
882 PHONY += $(vmlinux-dirs)
883 $(vmlinux-dirs): prepare scripts
884 $(Q)$(MAKE) $(build)=$@
885 ifdef CONFIG_MODULES
886 $(Q)$(MAKE) $(modbuiltin)=$@
887 endif
889 # Build the kernel release string
891 # The KERNELRELEASE value built here is stored in the file
892 # include/config/kernel.release, and is used when executing several
893 # make targets, such as "make install" or "make modules_install."
895 # The eventual kernel release string consists of the following fields,
896 # shown in a hierarchical format to show how smaller parts are concatenated
897 # to form the larger and final value, with values coming from places like
898 # the Makefile, kernel config options, make command line options and/or
899 # SCM tag information.
901 # $(KERNELVERSION)
902 # $(VERSION) eg, 2
903 # $(PATCHLEVEL) eg, 6
904 # $(SUBLEVEL) eg, 18
905 # $(EXTRAVERSION) eg, -rc6
906 # $(localver-full)
907 # $(localver)
908 # localversion* (files without backups, containing '~')
909 # $(CONFIG_LOCALVERSION) (from kernel config setting)
910 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
911 # ./scripts/setlocalversion (SCM tag, if one exists)
912 # $(LOCALVERSION) (from make command line if provided)
914 # Note how the final $(localver-auto) string is included *only* if the
915 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
916 # moment, only git is supported but other SCMs can edit the script
917 # scripts/setlocalversion and add the appropriate checks as needed.
919 pattern = ".*/localversion[^~]*"
920 string = $(shell cat /dev/null \
921 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
923 localver = $(subst $(space),, $(string) \
924 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
926 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
927 # and if the SCM is know a tag from the SCM is appended.
928 # The appended tag is determined by the SCM used.
930 # .scmversion is used when generating rpm packages so we do not loose
931 # the version information from the SCM when we do the build of the kernel
932 # from the copied source
933 ifdef CONFIG_LOCALVERSION_AUTO
935 ifeq ($(wildcard .scmversion),)
936 _localver-auto = $(shell $(CONFIG_SHELL) \
937 $(srctree)/scripts/setlocalversion $(srctree))
938 else
939 _localver-auto = $(shell cat .scmversion 2> /dev/null)
940 endif
942 localver-auto = $(LOCALVERSION)$(_localver-auto)
943 endif
945 localver-full = $(localver)$(localver-auto)
947 # Store (new) KERNELRELASE string in include/config/kernel.release
948 kernelrelease = $(KERNELVERSION)$(localver-full)
949 include/config/kernel.release: include/config/auto.conf FORCE
950 $(Q)rm -f $@
951 $(Q)echo $(kernelrelease) > $@
954 # Things we need to do before we recursively start building the kernel
955 # or the modules are listed in "prepare".
956 # A multi level approach is used. prepareN is processed before prepareN-1.
957 # archprepare is used in arch Makefiles and when processed asm symlink,
958 # version.h and scripts_basic is processed / created.
960 # Listed in dependency order
961 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
963 # prepare3 is used to check if we are building in a separate output directory,
964 # and if so do:
965 # 1) Check that make has not been executed in the kernel src $(srctree)
966 prepare3: include/config/kernel.release
967 ifneq ($(KBUILD_SRC),)
968 @$(kecho) ' Using $(srctree) as source for kernel'
969 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
970 echo " $(srctree) is not clean, please run 'make mrproper'";\
971 echo " in the '$(srctree)' directory.";\
972 /bin/false; \
974 endif
976 # prepare2 creates a makefile if using a separate output directory
977 prepare2: prepare3 outputmakefile
979 prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
980 include/config/auto.conf
981 $(cmd_crmodverdir)
983 archprepare: prepare1 scripts_basic
985 prepare0: archprepare FORCE
986 $(Q)$(MAKE) $(build)=.
987 $(Q)$(MAKE) $(build)=. missing-syscalls
989 # All the preparing..
990 prepare: prepare0
992 # Generate some files
993 # ---------------------------------------------------------------------------
995 # KERNELRELEASE can change from a few different places, meaning version.h
996 # needs to be updated, so this check is forced on all builds
998 uts_len := 64
999 define filechk_utsrelease.h
1000 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1001 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1002 exit 1; \
1003 fi; \
1004 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1005 endef
1007 define filechk_version.h
1008 (echo \#define LINUX_VERSION_CODE $(shell \
1009 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1010 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1011 endef
1013 include/linux/version.h: $(srctree)/Makefile FORCE
1014 $(call filechk,version.h)
1016 include/generated/utsrelease.h: include/config/kernel.release FORCE
1017 $(call filechk,utsrelease.h)
1019 PHONY += headerdep
1020 headerdep:
1021 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1023 # ---------------------------------------------------------------------------
1025 PHONY += depend dep
1026 depend dep:
1027 @echo '*** Warning: make $@ is unnecessary now.'
1029 # ---------------------------------------------------------------------------
1030 # Firmware install
1031 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1032 export INSTALL_FW_PATH
1034 PHONY += firmware_install
1035 firmware_install: FORCE
1036 @mkdir -p $(objtree)/firmware
1037 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1039 # ---------------------------------------------------------------------------
1040 # Kernel headers
1042 #Default location for installed headers
1043 export INSTALL_HDR_PATH = $(objtree)/usr
1045 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1047 # If we do an all arch process set dst to asm-$(hdr-arch)
1048 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1050 PHONY += __headers
1051 __headers: include/linux/version.h scripts_basic FORCE
1052 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1054 PHONY += headers_install_all
1055 headers_install_all:
1056 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1058 PHONY += headers_install
1059 headers_install: __headers
1060 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
1061 $(error Headers not exportable for the $(SRCARCH) architecture))
1062 $(Q)$(MAKE) $(hdr-inst)=include
1063 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
1065 PHONY += headers_check_all
1066 headers_check_all: headers_install_all
1067 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1069 PHONY += headers_check
1070 headers_check: headers_install
1071 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1072 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
1074 # ---------------------------------------------------------------------------
1075 # Modules
1077 ifdef CONFIG_MODULES
1079 # By default, build modules as well
1081 all: modules
1083 # Build modules
1085 # A module can be listed more than once in obj-m resulting in
1086 # duplicate lines in modules.order files. Those are removed
1087 # using awk while concatenating to the final file.
1089 PHONY += modules
1090 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1091 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1092 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
1093 @$(kecho) ' Building modules, stage 2.';
1094 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1095 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1098 # Target to prepare building external modules
1099 PHONY += modules_prepare
1100 modules_prepare: prepare scripts
1102 # Target to install modules
1103 PHONY += modules_install
1104 modules_install: _modinst_ _modinst_post
1106 PHONY += _modinst_
1107 _modinst_:
1108 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1109 echo "Warning: you may need to install module-init-tools"; \
1110 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1111 sleep 1; \
1113 @rm -rf $(MODLIB)/kernel
1114 @rm -f $(MODLIB)/source
1115 @mkdir -p $(MODLIB)/kernel
1116 @ln -s $(srctree) $(MODLIB)/source
1117 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1118 rm -f $(MODLIB)/build ; \
1119 ln -s $(objtree) $(MODLIB)/build ; \
1121 @cp -f $(objtree)/modules.order $(MODLIB)/
1122 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1123 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1125 # This depmod is only for convenience to give the initial
1126 # boot a modules.dep even before / is mounted read-write. However the
1127 # boot script depmod is the master version.
1128 PHONY += _modinst_post
1129 _modinst_post: _modinst_
1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1131 $(call cmd,depmod)
1133 else # CONFIG_MODULES
1135 # Modules not configured
1136 # ---------------------------------------------------------------------------
1138 modules modules_install: FORCE
1139 @echo
1140 @echo "The present kernel configuration has modules disabled."
1141 @echo "Type 'make config' and enable loadable module support."
1142 @echo "Then build a kernel with module support enabled."
1143 @echo
1144 @exit 1
1146 endif # CONFIG_MODULES
1149 # Cleaning is done on three levels.
1150 # make clean Delete most generated files
1151 # Leave enough to build external modules
1152 # make mrproper Delete the current configuration, and all generated files
1153 # make distclean Remove editor backup files, patch leftover files and the like
1155 # Directories & files removed with 'make clean'
1156 CLEAN_DIRS += $(MODVERDIR)
1157 CLEAN_FILES += vmlinux System.map \
1158 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1160 # Directories & files removed with 'make mrproper'
1161 MRPROPER_DIRS += include/config usr/include include/generated
1162 MRPROPER_FILES += .config .config.old .version .old_version \
1163 include/linux/version.h \
1164 Module.symvers tags TAGS cscope*
1166 # clean - Delete most, but leave enough to build external modules
1168 clean: rm-dirs := $(CLEAN_DIRS)
1169 clean: rm-files := $(CLEAN_FILES)
1170 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1172 PHONY += $(clean-dirs) clean archclean
1173 $(clean-dirs):
1174 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1176 clean: archclean $(clean-dirs)
1177 $(call cmd,rmdirs)
1178 $(call cmd,rmfiles)
1179 @find . $(RCS_FIND_IGNORE) \
1180 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1181 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1182 -o -name '*.symtypes' -o -name 'modules.order' \
1183 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1184 -o -name '*.gcno' \) -type f -print | xargs rm -f
1186 # mrproper - Delete all generated files, including .config
1188 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1189 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1190 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1192 PHONY += $(mrproper-dirs) mrproper archmrproper
1193 $(mrproper-dirs):
1194 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1196 mrproper: clean archmrproper $(mrproper-dirs)
1197 $(call cmd,rmdirs)
1198 $(call cmd,rmfiles)
1200 # distclean
1202 PHONY += distclean
1204 distclean: mrproper
1205 @find $(srctree) $(RCS_FIND_IGNORE) \
1206 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1207 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1208 -o -name '.*.rej' -o -size 0 \
1209 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1210 -type f -print | xargs rm -f
1213 # Packaging of the kernel to various formats
1214 # ---------------------------------------------------------------------------
1215 # rpm target kept for backward compatibility
1216 package-dir := $(srctree)/scripts/package
1218 %pkg: include/config/kernel.release FORCE
1219 $(Q)$(MAKE) $(build)=$(package-dir) $@
1220 rpm: include/config/kernel.release FORCE
1221 $(Q)$(MAKE) $(build)=$(package-dir) $@
1224 # Brief documentation of the typical targets used
1225 # ---------------------------------------------------------------------------
1227 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1228 boards := $(notdir $(boards))
1229 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1230 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1232 help:
1233 @echo 'Cleaning targets:'
1234 @echo ' clean - Remove most generated files but keep the config and'
1235 @echo ' enough build support to build external modules'
1236 @echo ' mrproper - Remove all generated files + config + various backup files'
1237 @echo ' distclean - mrproper + remove editor backup and patch files'
1238 @echo ''
1239 @echo 'Configuration targets:'
1240 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1241 @echo ''
1242 @echo 'Other generic targets:'
1243 @echo ' all - Build all targets marked with [*]'
1244 @echo '* vmlinux - Build the bare kernel'
1245 @echo '* modules - Build all modules'
1246 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1247 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1248 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1249 @echo ' dir/ - Build all files in dir and below'
1250 @echo ' dir/file.[ois] - Build specified target only'
1251 @echo ' dir/file.ko - Build module including final link'
1252 @echo ' modules_prepare - Set up for building external modules'
1253 @echo ' tags/TAGS - Generate tags file for editors'
1254 @echo ' cscope - Generate cscope index'
1255 @echo ' kernelrelease - Output the release version string'
1256 @echo ' kernelversion - Output the version stored in Makefile'
1257 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1258 echo ' (default: $(INSTALL_HDR_PATH))'; \
1259 echo ''
1260 @echo 'Static analysers'
1261 @echo ' checkstack - Generate a list of stack hogs'
1262 @echo ' namespacecheck - Name space analysis on compiled kernel'
1263 @echo ' versioncheck - Sanity check on version.h usage'
1264 @echo ' includecheck - Check for duplicate included header files'
1265 @echo ' export_report - List the usages of all exported symbols'
1266 @echo ' headers_check - Sanity check on exported headers'
1267 @echo ' headerdep - Detect inclusion cycles in headers'; \
1268 echo ''
1269 @echo 'Kernel packaging:'
1270 @$(MAKE) $(build)=$(package-dir) help
1271 @echo ''
1272 @echo 'Documentation targets:'
1273 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1274 @echo ''
1275 @echo 'Architecture specific targets ($(SRCARCH)):'
1276 @$(if $(archhelp),$(archhelp),\
1277 echo ' No architecture specific help defined for $(SRCARCH)')
1278 @echo ''
1279 @$(if $(boards), \
1280 $(foreach b, $(boards), \
1281 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1282 echo '')
1283 @$(if $(board-dirs), \
1284 $(foreach b, $(board-dirs), \
1285 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1286 printf " %-16s - Show all of the above\\n" help-boards; \
1287 echo '')
1289 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1290 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1291 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1292 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1293 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1294 @echo ''
1295 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1296 @echo 'For further info see the ./README file'
1299 help-board-dirs := $(addprefix help-,$(board-dirs))
1301 help-boards: $(help-board-dirs)
1303 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1305 $(help-board-dirs): help-%:
1306 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1307 @$(if $(boards-per-dir), \
1308 $(foreach b, $(boards-per-dir), \
1309 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1310 echo '')
1313 # Documentation targets
1314 # ---------------------------------------------------------------------------
1315 %docs: scripts_basic FORCE
1316 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1318 else # KBUILD_EXTMOD
1321 # External module support.
1322 # When building external modules the kernel used as basis is considered
1323 # read-only, and no consistency checks are made and the make
1324 # system is not used on the basis kernel. If updates are required
1325 # in the basis kernel ordinary make commands (without M=...) must
1326 # be used.
1328 # The following are the only valid targets when building external
1329 # modules.
1330 # make M=dir clean Delete all automatically generated files
1331 # make M=dir modules Make all modules in specified dir
1332 # make M=dir Same as 'make M=dir modules'
1333 # make M=dir modules_install
1334 # Install the modules built in the module directory
1335 # Assumes install directory is already created
1337 # We are always building modules
1338 KBUILD_MODULES := 1
1339 PHONY += crmodverdir
1340 crmodverdir:
1341 $(cmd_crmodverdir)
1343 PHONY += $(objtree)/Module.symvers
1344 $(objtree)/Module.symvers:
1345 @test -e $(objtree)/Module.symvers || ( \
1346 echo; \
1347 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1348 echo " is missing; modules will have no dependencies and modversions."; \
1349 echo )
1351 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1352 PHONY += $(module-dirs) modules
1353 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1354 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1356 modules: $(module-dirs)
1357 @$(kecho) ' Building modules, stage 2.';
1358 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1360 PHONY += modules_install
1361 modules_install: _emodinst_ _emodinst_post
1363 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1364 PHONY += _emodinst_
1365 _emodinst_:
1366 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1367 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1369 PHONY += _emodinst_post
1370 _emodinst_post: _emodinst_
1371 $(call cmd,depmod)
1373 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1375 PHONY += $(clean-dirs) clean
1376 $(clean-dirs):
1377 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1379 clean: rm-dirs := $(MODVERDIR)
1380 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1381 $(KBUILD_EXTMOD)/modules.order \
1382 $(KBUILD_EXTMOD)/modules.builtin
1383 clean: $(clean-dirs)
1384 $(call cmd,rmdirs)
1385 $(call cmd,rmfiles)
1386 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1387 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1388 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1389 -o -name '*.gcno' \) -type f -print | xargs rm -f
1391 help:
1392 @echo ' Building external modules.'
1393 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1394 @echo ''
1395 @echo ' modules - default target, build the module(s)'
1396 @echo ' modules_install - install the module'
1397 @echo ' clean - remove generated files in module directory only'
1398 @echo ''
1400 # Dummies...
1401 PHONY += prepare scripts
1402 prepare: ;
1403 scripts: ;
1404 endif # KBUILD_EXTMOD
1406 # Generate tags for editors
1407 # ---------------------------------------------------------------------------
1408 quiet_cmd_tags = GEN $@
1409 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1411 tags TAGS cscope: FORCE
1412 $(call cmd,tags)
1414 # Scripts to check various things for consistency
1415 # ---------------------------------------------------------------------------
1417 includecheck:
1418 find * $(RCS_FIND_IGNORE) \
1419 -name '*.[hcS]' -type f -print | sort \
1420 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1422 versioncheck:
1423 find * $(RCS_FIND_IGNORE) \
1424 -name '*.[hcS]' -type f -print | sort \
1425 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1427 namespacecheck:
1428 $(PERL) $(srctree)/scripts/namespace.pl
1430 export_report:
1431 $(PERL) $(srctree)/scripts/export_report.pl
1433 endif #ifeq ($(config-targets),1)
1434 endif #ifeq ($(mixed-targets),1)
1436 PHONY += checkstack kernelrelease kernelversion
1438 # UML needs a little special treatment here. It wants to use the host
1439 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1440 # else wants $(ARCH), including people doing cross-builds, which means
1441 # that $(SUBARCH) doesn't work here.
1442 ifeq ($(ARCH), um)
1443 CHECKSTACK_ARCH := $(SUBARCH)
1444 else
1445 CHECKSTACK_ARCH := $(ARCH)
1446 endif
1447 checkstack:
1448 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1449 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1451 kernelrelease:
1452 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1453 $(error kernelrelease not valid - run 'make prepare' to update it))
1454 kernelversion:
1455 @echo $(KERNELVERSION)
1457 # Single targets
1458 # ---------------------------------------------------------------------------
1459 # Single targets are compatible with:
1460 # - build with mixed source and output
1461 # - build with separate output dir 'make O=...'
1462 # - external modules
1464 # target-dir => where to store outputfile
1465 # build-dir => directory in kernel source tree to use
1467 ifeq ($(KBUILD_EXTMOD),)
1468 build-dir = $(patsubst %/,%,$(dir $@))
1469 target-dir = $(dir $@)
1470 else
1471 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1472 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1473 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1474 endif
1476 %.s: %.c prepare scripts FORCE
1477 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1478 %.i: %.c prepare scripts FORCE
1479 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1480 %.o: %.c prepare scripts FORCE
1481 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1482 %.lst: %.c prepare scripts FORCE
1483 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1484 %.s: %.S prepare scripts FORCE
1485 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1486 %.o: %.S prepare scripts FORCE
1487 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1488 %.symtypes: %.c prepare scripts FORCE
1489 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1491 # Modules
1492 /: prepare scripts FORCE
1493 $(cmd_crmodverdir)
1494 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1495 $(build)=$(build-dir)
1496 %/: prepare scripts FORCE
1497 $(cmd_crmodverdir)
1498 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1499 $(build)=$(build-dir)
1500 %.ko: prepare scripts FORCE
1501 $(cmd_crmodverdir)
1502 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1503 $(build)=$(build-dir) $(@:.ko=.o)
1504 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1506 # FIXME Should go into a make.lib or something
1507 # ===========================================================================
1509 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1510 cmd_rmdirs = rm -rf $(rm-dirs)
1512 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1513 cmd_rmfiles = rm -f $(rm-files)
1515 # Run depmod only if we have System.map and depmod is executable
1516 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1517 cmd_depmod = \
1518 if [ -r System.map -a -x $(DEPMOD) ]; then \
1519 $(DEPMOD) -ae -F System.map \
1520 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1521 $(KERNELRELEASE); \
1524 # Create temporary dir for module support files
1525 # clean it up only when building all modules
1526 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1527 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1529 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1530 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1531 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1533 quiet_cmd_as_o_S = AS $@
1534 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1536 # read all saved command lines
1538 targets := $(wildcard $(sort $(targets)))
1539 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1541 ifneq ($(cmd_files),)
1542 $(cmd_files): ; # Do not try to update included dependency files
1543 include $(cmd_files)
1544 endif
1546 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1547 # Usage:
1548 # $(Q)$(MAKE) $(clean)=dir
1549 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1551 endif # skip-makefile
1553 PHONY += FORCE
1554 FORCE:
1556 # Declare the contents of the .PHONY variable as phony. We keep that
1557 # information in a variable so we can use it in if_changed and friends.
1558 .PHONY: $(PHONY)