conn rcv_lock converted to spinlock, struct cor_sock created, kernel_packet skb_clone...
[cor_2_6_31.git] / Makefile
blob802fe45885ddc7953dcda09b136be4fd8ff82cd6
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 31
4 EXTRAVERSION = -rc5
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 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
28 # is now up to date.
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
33 # prepare rule.
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
38 ifeq ("$(origin V)", "command line")
39 KBUILD_VERBOSE = $(V)
40 endif
41 ifndef KBUILD_VERBOSE
42 KBUILD_VERBOSE = 0
43 endif
45 # Call a source code checker (by default, "sparse") as part of the
46 # C compilation.
48 # Use 'make C=1' to enable checking of only re-compiled files.
49 # Use 'make C=2' to enable checking of *all* source files, regardless
50 # of whether they are re-compiled or not.
52 # See the file "Documentation/sparse.txt" for more details, including
53 # where to get the "sparse" utility.
55 ifeq ("$(origin C)", "command line")
56 KBUILD_CHECKSRC = $(C)
57 endif
58 ifndef KBUILD_CHECKSRC
59 KBUILD_CHECKSRC = 0
60 endif
62 # Use make M=dir to specify directory of external module to build
63 # Old syntax make ... SUBDIRS=$PWD is still supported
64 # Setting the environment variable KBUILD_EXTMOD take precedence
65 ifdef SUBDIRS
66 KBUILD_EXTMOD ?= $(SUBDIRS)
67 endif
69 ifeq ("$(origin M)", "command line")
70 KBUILD_EXTMOD := $(M)
71 endif
73 # kbuild supports saving output files in a separate directory.
74 # To locate output files in a separate directory two syntaxes are supported.
75 # In both cases the working directory must be the root of the kernel src.
76 # 1) O=
77 # Use "make O=dir/to/store/output/files/"
79 # 2) Set KBUILD_OUTPUT
80 # Set the environment variable KBUILD_OUTPUT to point to the directory
81 # where the output files shall be placed.
82 # export KBUILD_OUTPUT=dir/to/store/output/files/
83 # make
85 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
86 # variable.
89 # KBUILD_SRC is set on invocation of make in OBJ directory
90 # KBUILD_SRC is not intended to be used by the regular user (for now)
91 ifeq ($(KBUILD_SRC),)
93 # OK, Make called in directory where kernel src resides
94 # Do we want to locate output files in a separate directory?
95 ifeq ("$(origin O)", "command line")
96 KBUILD_OUTPUT := $(O)
97 endif
99 # That's our default target when none is given on the command line
100 PHONY := _all
101 _all:
103 # Cancel implicit rules on top Makefile
104 $(CURDIR)/Makefile Makefile: ;
106 ifneq ($(KBUILD_OUTPUT),)
107 # Invoke a second make in the output directory, passing relevant variables
108 # check that the output directory actually exists
109 saved-output := $(KBUILD_OUTPUT)
110 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
111 $(if $(KBUILD_OUTPUT),, \
112 $(error output directory "$(saved-output)" does not exist))
114 PHONY += $(MAKECMDGOALS) sub-make
116 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
117 $(Q)@:
119 sub-make: FORCE
120 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
121 KBUILD_SRC=$(CURDIR) \
122 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
123 $(filter-out _all sub-make,$(MAKECMDGOALS))
125 # Leave processing to above invocation of make
126 skip-makefile := 1
127 endif # ifneq ($(KBUILD_OUTPUT),)
128 endif # ifeq ($(KBUILD_SRC),)
130 # We process the rest of the Makefile if this is the final invocation of make
131 ifeq ($(skip-makefile),)
133 # If building an external module we do not care about the all: rule
134 # but instead _all depend on modules
135 PHONY += all
136 ifeq ($(KBUILD_EXTMOD),)
137 _all: all
138 else
139 _all: modules
140 endif
142 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
143 objtree := $(CURDIR)
144 src := $(srctree)
145 obj := $(objtree)
147 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
149 export srctree objtree VPATH
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 := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
159 # -e s/arm.*/arm/ -e s/sa110/arm/ \
160 # -e s/s390x/s390/ -e s/parisc64/parisc/ \
161 # -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
162 # -e s/sh[234].*/sh/ )
163 SUBARCH := $(shell echo "i386")
165 # Cross compiling and selecting different set of gcc/bin-utils
166 # ---------------------------------------------------------------------------
168 # When performing cross compilation for other architectures ARCH shall be set
169 # to the target architecture. (See arch/* for the possibilities).
170 # ARCH can be set during invocation of make:
171 # make ARCH=ia64
172 # Another way is to have ARCH set in the environment.
173 # The default ARCH is the host where make is executed.
175 # CROSS_COMPILE specify the prefix used for all executables used
176 # during compilation. Only gcc and related bin-utils executables
177 # are prefixed with $(CROSS_COMPILE).
178 # CROSS_COMPILE can be set on the command line
179 # make CROSS_COMPILE=ia64-linux-
180 # Alternatively CROSS_COMPILE can be set in the environment.
181 # Default value for CROSS_COMPILE is not to prefix executables
182 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
183 export KBUILD_BUILDHOST := $(SUBARCH)
184 ARCH ?= $(SUBARCH)
185 CROSS_COMPILE ?=
187 # Architecture as present in compile.h
188 UTS_MACHINE := $(ARCH)
189 SRCARCH := $(ARCH)
191 # Additional ARCH settings for x86
192 ifeq ($(ARCH),i386)
193 SRCARCH := x86
194 endif
195 ifeq ($(ARCH),x86_64)
196 SRCARCH := x86
197 endif
199 # Additional ARCH settings for sparc
200 ifeq ($(ARCH),sparc64)
201 SRCARCH := sparc
202 endif
204 # Additional ARCH settings for sh
205 ifeq ($(ARCH),sh64)
206 SRCARCH := sh
207 endif
209 # Where to locate arch specific headers
210 hdr-arch := $(SRCARCH)
212 ifeq ($(ARCH),m68knommu)
213 hdr-arch := m68k
214 endif
216 KCONFIG_CONFIG ?= .config
218 # SHELL used by kbuild
219 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
220 else if [ -x /bin/bash ]; then echo /bin/bash; \
221 else echo sh; fi ; fi)
223 HOSTCC = gcc
224 HOSTCXX = g++
225 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
226 HOSTCXXFLAGS = -O2
228 # Decide whether to build built-in, modular, or both.
229 # Normally, just do built-in.
231 KBUILD_MODULES :=
232 KBUILD_BUILTIN := 1
234 # If we have only "make modules", don't compile built-in objects.
235 # When we're building modules with modversions, we need to consider
236 # the built-in objects during the descend as well, in order to
237 # make sure the checksums are up to date before we record them.
239 ifeq ($(MAKECMDGOALS),modules)
240 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
241 endif
243 # If we have "make <whatever> modules", compile modules
244 # in addition to whatever we do anyway.
245 # Just "make" or "make all" shall build modules as well
247 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
248 KBUILD_MODULES := 1
249 endif
251 ifeq ($(MAKECMDGOALS),)
252 KBUILD_MODULES := 1
253 endif
255 export KBUILD_MODULES KBUILD_BUILTIN
256 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
258 # Beautify output
259 # ---------------------------------------------------------------------------
261 # Normally, we echo the whole command before executing it. By making
262 # that echo $($(quiet)$(cmd)), we now have the possibility to set
263 # $(quiet) to choose other forms of output instead, e.g.
265 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
266 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
268 # If $(quiet) is empty, the whole command will be printed.
269 # If it is set to "quiet_", only the short version will be printed.
270 # If it is set to "silent_", nothing will be printed at all, since
271 # the variable $(silent_cmd_cc_o_c) doesn't exist.
273 # A simple variant is to prefix commands with $(Q) - that's useful
274 # for commands that shall be hidden in non-verbose mode.
276 # $(Q)ln $@ :<
278 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
279 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
281 ifeq ($(KBUILD_VERBOSE),1)
282 quiet =
284 else
285 quiet=quiet_
286 Q = @
287 endif
289 # If the user is running make -s (silent mode), suppress echoing of
290 # commands
292 ifneq ($(findstring s,$(MAKEFLAGS)),)
293 quiet=silent_
294 endif
296 export quiet Q KBUILD_VERBOSE
299 # Look for make include files relative to root of kernel src
300 MAKEFLAGS += --include-dir=$(srctree)
302 # We need some generic definitions (do not try to remake the file).
303 $(srctree)/scripts/Kbuild.include: ;
304 include $(srctree)/scripts/Kbuild.include
306 # Make variables (CC, etc...)
308 AS = $(CROSS_COMPILE)as
309 LD = $(CROSS_COMPILE)ld
310 CC = $(CROSS_COMPILE)gcc
311 CPP = $(CC) -E
312 AR = $(CROSS_COMPILE)ar
313 NM = $(CROSS_COMPILE)nm
314 STRIP = $(CROSS_COMPILE)strip
315 OBJCOPY = $(CROSS_COMPILE)objcopy
316 OBJDUMP = $(CROSS_COMPILE)objdump
317 AWK = awk
318 GENKSYMS = scripts/genksyms/genksyms
319 DEPMOD = /sbin/depmod
320 KALLSYMS = scripts/kallsyms
321 PERL = perl
322 CHECK = sparse
324 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
325 -Wbitwise -Wno-return-void $(CF)
326 MODFLAGS = -DMODULE
327 CFLAGS_MODULE = $(MODFLAGS)
328 AFLAGS_MODULE = $(MODFLAGS)
329 LDFLAGS_MODULE =
330 CFLAGS_KERNEL =
331 AFLAGS_KERNEL =
332 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
335 # Use LINUXINCLUDE when you must reference the include/ directory.
336 # Needed to be compatible with the O= option
337 LINUXINCLUDE := -Iinclude \
338 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
339 -I$(srctree)/arch/$(hdr-arch)/include \
340 -include include/linux/autoconf.h
342 KBUILD_CPPFLAGS := -D__KERNEL__
344 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
345 -fno-strict-aliasing -fno-common \
346 -Werror-implicit-function-declaration \
347 -Wno-format-security \
348 -fno-delete-null-pointer-checks
349 KBUILD_AFLAGS := -D__ASSEMBLY__
351 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
352 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
353 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
355 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
356 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
357 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
358 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
360 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
361 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
362 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
364 # When compiling out-of-tree modules, put MODVERDIR in the module
365 # tree rather than in the kernel tree. The kernel tree might
366 # even be read-only.
367 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
369 # Files to ignore in find ... statements
371 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
372 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
374 # ===========================================================================
375 # Rules shared between *config targets and build targets
377 # Basic helpers built in scripts/
378 PHONY += scripts_basic
379 scripts_basic:
380 $(Q)$(MAKE) $(build)=scripts/basic
382 # To avoid any implicit rule to kick in, define an empty command.
383 scripts/basic/%: scripts_basic ;
385 PHONY += outputmakefile
386 # outputmakefile generates a Makefile in the output directory, if using a
387 # separate output directory. This allows convenient use of make in the
388 # output directory.
389 outputmakefile:
390 ifneq ($(KBUILD_SRC),)
391 $(Q)ln -fsn $(srctree) source
392 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
393 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
394 endif
396 # To make sure we do not include .config for any of the *config targets
397 # catch them early, and hand them over to scripts/kconfig/Makefile
398 # It is allowed to specify more targets when calling make, including
399 # mixing *config targets and build targets.
400 # For example 'make oldconfig all'.
401 # Detect when mixed targets is specified, and make a second invocation
402 # of make so .config is not included in this case either (for *config).
404 no-dot-config-targets := clean mrproper distclean \
405 cscope TAGS tags help %docs check% \
406 include/linux/version.h headers_% \
407 kernelrelease kernelversion
409 config-targets := 0
410 mixed-targets := 0
411 dot-config := 1
413 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
414 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
415 dot-config := 0
416 endif
417 endif
419 ifeq ($(KBUILD_EXTMOD),)
420 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
421 config-targets := 1
422 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
423 mixed-targets := 1
424 endif
425 endif
426 endif
428 ifeq ($(mixed-targets),1)
429 # ===========================================================================
430 # We're called with mixed targets (*config and build targets).
431 # Handle them one by one.
433 %:: FORCE
434 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
436 else
437 ifeq ($(config-targets),1)
438 # ===========================================================================
439 # *config targets only - make sure prerequisites are updated, and descend
440 # in scripts/kconfig to make the *config target
442 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
443 # KBUILD_DEFCONFIG may point out an alternative default configuration
444 # used for 'make defconfig'
445 include $(srctree)/arch/$(SRCARCH)/Makefile
446 export KBUILD_DEFCONFIG KBUILD_KCONFIG
448 config: scripts_basic outputmakefile FORCE
449 $(Q)mkdir -p include/linux include/config
450 $(Q)$(MAKE) $(build)=scripts/kconfig $@
452 %config: scripts_basic outputmakefile FORCE
453 $(Q)mkdir -p include/linux include/config
454 $(Q)$(MAKE) $(build)=scripts/kconfig $@
456 else
457 # ===========================================================================
458 # Build targets only - this includes vmlinux, arch specific targets, clean
459 # targets and others. In general all targets except *config targets.
461 ifeq ($(KBUILD_EXTMOD),)
462 # Additional helpers built in scripts/
463 # Carefully list dependencies so we do not try to build scripts twice
464 # in parallel
465 PHONY += scripts
466 scripts: scripts_basic include/config/auto.conf
467 $(Q)$(MAKE) $(build)=$(@)
469 # Objects we will link into vmlinux / subdirs we need to visit
470 init-y := init/
471 drivers-y := drivers/ sound/ firmware/
472 net-y := net/
473 libs-y := lib/
474 core-y := usr/
475 endif # KBUILD_EXTMOD
477 ifeq ($(dot-config),1)
478 # Read in config
479 -include include/config/auto.conf
481 ifeq ($(KBUILD_EXTMOD),)
482 # Read in dependencies to all Kconfig* files, make sure to run
483 # oldconfig if changes are detected.
484 -include include/config/auto.conf.cmd
486 # To avoid any implicit rule to kick in, define an empty command
487 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
489 # If .config is newer than include/config/auto.conf, someone tinkered
490 # with it and forgot to run make oldconfig.
491 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
492 # we execute the config step to be sure to catch updated Kconfig files
493 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
494 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
495 else
496 # external modules needs include/linux/autoconf.h and include/config/auto.conf
497 # but do not care if they are up-to-date. Use auto.conf to trigger the test
498 PHONY += include/config/auto.conf
500 include/config/auto.conf:
501 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
502 echo; \
503 echo " ERROR: Kernel configuration is invalid."; \
504 echo " include/linux/autoconf.h or $@ are missing."; \
505 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
506 echo; \
507 /bin/false)
509 endif # KBUILD_EXTMOD
511 else
512 # Dummy target needed, because used as prerequisite
513 include/config/auto.conf: ;
514 endif # $(dot-config)
516 # The all: target is the default when no target is given on the
517 # command line.
518 # This allow a user to issue only 'make' to build a kernel including modules
519 # Defaults vmlinux but it is usually overridden in the arch makefile
520 all: vmlinux
522 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
523 KBUILD_CFLAGS += -Os
524 else
525 KBUILD_CFLAGS += -O2
526 endif
528 include $(srctree)/arch/$(SRCARCH)/Makefile
530 ifneq ($(CONFIG_FRAME_WARN),0)
531 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
532 endif
534 # Force gcc to behave correct even for buggy distributions
535 ifndef CONFIG_CC_STACKPROTECTOR
536 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
537 endif
539 ifdef CONFIG_FRAME_POINTER
540 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
541 else
542 KBUILD_CFLAGS += -fomit-frame-pointer
543 endif
545 ifdef CONFIG_DEBUG_INFO
546 KBUILD_CFLAGS += -g
547 KBUILD_AFLAGS += -gdwarf-2
548 endif
550 ifdef CONFIG_FUNCTION_TRACER
551 KBUILD_CFLAGS += -pg
552 endif
554 # We trigger additional mismatches with less inlining
555 ifdef CONFIG_DEBUG_SECTION_MISMATCH
556 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
557 endif
559 # arch Makefile may override CC so keep this after arch Makefile is included
560 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
561 CHECKFLAGS += $(NOSTDINC_FLAGS)
563 # warn about C99 declaration after statement
564 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
566 # disable pointer signed / unsigned warnings in gcc 4.0
567 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
569 # disable invalid "can't wrap" optimizations for signed / pointers
570 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
572 # revert to pre-gcc-4.4 behaviour of .eh_frame
573 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
575 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
576 # But warn user when we do so
577 warn-assign = \
578 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
580 ifneq ($(KCPPFLAGS),)
581 $(call warn-assign,CPPFLAGS)
582 KBUILD_CPPFLAGS += $(KCPPFLAGS)
583 endif
584 ifneq ($(KAFLAGS),)
585 $(call warn-assign,AFLAGS)
586 KBUILD_AFLAGS += $(KAFLAGS)
587 endif
588 ifneq ($(KCFLAGS),)
589 $(call warn-assign,CFLAGS)
590 KBUILD_CFLAGS += $(KCFLAGS)
591 endif
593 # Use --build-id when available.
594 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
595 $(call ld-option, -Wl$(comma)--build-id,))
596 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
597 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
599 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
600 LDFLAGS_vmlinux += -X
601 endif
603 # Default kernel image to build when no specific target is given.
604 # KBUILD_IMAGE may be overruled on the command line or
605 # set in the environment
606 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
607 # this default value
608 export KBUILD_IMAGE ?= vmlinux
611 # INSTALL_PATH specifies where to place the updated kernel and system map
612 # images. Default is /boot, but you can set it to other values
613 export INSTALL_PATH ?= /boot
616 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
617 # relocations required by build roots. This is not defined in the
618 # makefile but the argument can be passed to make if needed.
621 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
622 export MODLIB
625 # INSTALL_MOD_STRIP, if defined, will cause modules to be
626 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
627 # the default option --strip-debug will be used. Otherwise,
628 # INSTALL_MOD_STRIP will used as the options to the strip command.
630 ifdef INSTALL_MOD_STRIP
631 ifeq ($(INSTALL_MOD_STRIP),1)
632 mod_strip_cmd = $(STRIP) --strip-debug
633 else
634 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
635 endif # INSTALL_MOD_STRIP=1
636 else
637 mod_strip_cmd = true
638 endif # INSTALL_MOD_STRIP
639 export mod_strip_cmd
642 ifeq ($(KBUILD_EXTMOD),)
643 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
645 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
646 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
647 $(net-y) $(net-m) $(libs-y) $(libs-m)))
649 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
650 $(init-n) $(init-) \
651 $(core-n) $(core-) $(drivers-n) $(drivers-) \
652 $(net-n) $(net-) $(libs-n) $(libs-))))
654 init-y := $(patsubst %/, %/built-in.o, $(init-y))
655 core-y := $(patsubst %/, %/built-in.o, $(core-y))
656 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
657 net-y := $(patsubst %/, %/built-in.o, $(net-y))
658 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
659 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
660 libs-y := $(libs-y1) $(libs-y2)
662 # Build vmlinux
663 # ---------------------------------------------------------------------------
664 # vmlinux is built from the objects selected by $(vmlinux-init) and
665 # $(vmlinux-main). Most are built-in.o files from top-level directories
666 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
667 # Ordering when linking is important, and $(vmlinux-init) must be first.
669 # vmlinux
672 # +-< $(vmlinux-init)
673 # | +--< init/version.o + more
675 # +--< $(vmlinux-main)
676 # | +--< driver/built-in.o mm/built-in.o + more
678 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
680 # vmlinux version (uname -v) cannot be updated during normal
681 # descending-into-subdirs phase since we do not yet know if we need to
682 # update vmlinux.
683 # Therefore this step is delayed until just before final link of vmlinux -
684 # except in the kallsyms case where it is done just before adding the
685 # symbols to the kernel.
687 # System.map is generated to document addresses of all kernel symbols
689 vmlinux-init := $(head-y) $(init-y)
690 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
691 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
692 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
693 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
695 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
696 # May be overridden by arch/$(ARCH)/Makefile
697 quiet_cmd_vmlinux__ ?= LD $@
698 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
699 -T $(vmlinux-lds) $(vmlinux-init) \
700 --start-group $(vmlinux-main) --end-group \
701 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
703 # Generate new vmlinux version
704 quiet_cmd_vmlinux_version = GEN .version
705 cmd_vmlinux_version = set -e; \
706 if [ ! -r .version ]; then \
707 rm -f .version; \
708 echo 1 >.version; \
709 else \
710 mv .version .old_version; \
711 expr 0$$(cat .old_version) + 1 >.version; \
712 fi; \
713 $(MAKE) $(build)=init
715 # Generate System.map
716 quiet_cmd_sysmap = SYSMAP
717 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
719 # Link of vmlinux
720 # If CONFIG_KALLSYMS is set .version is already updated
721 # Generate System.map and verify that the content is consistent
722 # Use + in front of the vmlinux_version rule to silent warning with make -j2
723 # First command is ':' to allow us to use + in front of the rule
724 define rule_vmlinux__
726 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
728 $(call cmd,vmlinux__)
729 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
731 $(Q)$(if $($(quiet)cmd_sysmap), \
732 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
733 $(cmd_sysmap) $@ System.map; \
734 if [ $$? -ne 0 ]; then \
735 rm -f $@; \
736 /bin/false; \
738 $(verify_kallsyms)
739 endef
742 ifdef CONFIG_KALLSYMS
743 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
744 # It's a three stage process:
745 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
746 # empty
747 # Running kallsyms on that gives us .tmp_kallsyms1.o with
748 # the right size - vmlinux version (uname -v) is updated during this step
749 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
750 # but due to the added section, some addresses have shifted.
751 # From here, we generate a correct .tmp_kallsyms2.o
752 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
753 # o Verify that the System.map from vmlinux matches the map from
754 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
755 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
756 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
757 # temporary bypass to allow the kernel to be built while the
758 # maintainers work out what went wrong with kallsyms.
760 ifdef CONFIG_KALLSYMS_EXTRA_PASS
761 last_kallsyms := 3
762 else
763 last_kallsyms := 2
764 endif
766 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
768 define verify_kallsyms
769 $(Q)$(if $($(quiet)cmd_sysmap), \
770 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
771 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
772 $(Q)cmp -s System.map .tmp_System.map || \
773 (echo Inconsistent kallsyms data; \
774 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
775 rm .tmp_kallsyms* ; /bin/false )
776 endef
778 # Update vmlinux version before link
779 # Use + in front of this rule to silent warning about make -j1
780 # First command is ':' to allow us to use + in front of this rule
781 cmd_ksym_ld = $(cmd_vmlinux__)
782 define rule_ksym_ld
784 +$(call cmd,vmlinux_version)
785 $(call cmd,vmlinux__)
786 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
787 endef
789 # Generate .S file with all kernel symbols
790 quiet_cmd_kallsyms = KSYM $@
791 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
792 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
794 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
795 $(call if_changed_dep,as_o_S)
797 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
798 $(call cmd,kallsyms)
800 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
801 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
802 $(call if_changed_rule,ksym_ld)
804 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
805 $(call if_changed,vmlinux__)
807 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
808 $(call if_changed,vmlinux__)
810 # Needs to visit scripts/ before $(KALLSYMS) can be used.
811 $(KALLSYMS): scripts ;
813 # Generate some data for debugging strange kallsyms problems
814 debug_kallsyms: .tmp_map$(last_kallsyms)
816 .tmp_map%: .tmp_vmlinux% FORCE
817 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
819 .tmp_map3: .tmp_map2
821 .tmp_map2: .tmp_map1
823 endif # ifdef CONFIG_KALLSYMS
825 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
826 # relevant sections renamed as per the linker script.
827 quiet_cmd_vmlinux-modpost = LD $@
828 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
829 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
830 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
831 define rule_vmlinux-modpost
833 +$(call cmd,vmlinux-modpost)
834 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
835 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
836 endef
838 # vmlinux image - including updated kernel symbols
839 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
840 ifdef CONFIG_HEADERS_CHECK
841 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
842 endif
843 ifdef CONFIG_SAMPLES
844 $(Q)$(MAKE) $(build)=samples
845 endif
846 ifdef CONFIG_BUILD_DOCSRC
847 $(Q)$(MAKE) $(build)=Documentation
848 endif
849 $(call vmlinux-modpost)
850 $(call if_changed_rule,vmlinux__)
851 $(Q)rm -f .old_version
853 # build vmlinux.o first to catch section mismatch errors early
854 ifdef CONFIG_KALLSYMS
855 .tmp_vmlinux1: vmlinux.o
856 endif
858 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
859 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
860 $(call if_changed_rule,vmlinux-modpost)
862 # The actual objects are generated when descending,
863 # make sure no implicit rule kicks in
864 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
866 # Handle descending into subdirectories listed in $(vmlinux-dirs)
867 # Preset locale variables to speed up the build process. Limit locale
868 # tweaks to this spot to avoid wrong language settings when running
869 # make menuconfig etc.
870 # Error messages still appears in the original language
872 PHONY += $(vmlinux-dirs)
873 $(vmlinux-dirs): prepare scripts
874 $(Q)$(MAKE) $(build)=$@
876 # Build the kernel release string
878 # The KERNELRELEASE value built here is stored in the file
879 # include/config/kernel.release, and is used when executing several
880 # make targets, such as "make install" or "make modules_install."
882 # The eventual kernel release string consists of the following fields,
883 # shown in a hierarchical format to show how smaller parts are concatenated
884 # to form the larger and final value, with values coming from places like
885 # the Makefile, kernel config options, make command line options and/or
886 # SCM tag information.
888 # $(KERNELVERSION)
889 # $(VERSION) eg, 2
890 # $(PATCHLEVEL) eg, 6
891 # $(SUBLEVEL) eg, 18
892 # $(EXTRAVERSION) eg, -rc6
893 # $(localver-full)
894 # $(localver)
895 # localversion* (files without backups, containing '~')
896 # $(CONFIG_LOCALVERSION) (from kernel config setting)
897 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
898 # ./scripts/setlocalversion (SCM tag, if one exists)
899 # $(LOCALVERSION) (from make command line if provided)
901 # Note how the final $(localver-auto) string is included *only* if the
902 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
903 # moment, only git is supported but other SCMs can edit the script
904 # scripts/setlocalversion and add the appropriate checks as needed.
906 pattern = ".*/localversion[^~]*"
907 string = $(shell cat /dev/null \
908 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
910 localver = $(subst $(space),, $(string) \
911 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
913 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
914 # and if the SCM is know a tag from the SCM is appended.
915 # The appended tag is determined by the SCM used.
917 # .scmversion is used when generating rpm packages so we do not loose
918 # the version information from the SCM when we do the build of the kernel
919 # from the copied source
920 ifdef CONFIG_LOCALVERSION_AUTO
922 ifeq ($(wildcard .scmversion),)
923 _localver-auto = $(shell $(CONFIG_SHELL) \
924 $(srctree)/scripts/setlocalversion $(srctree))
925 else
926 _localver-auto = $(shell cat .scmversion 2> /dev/null)
927 endif
929 localver-auto = $(LOCALVERSION)$(_localver-auto)
930 endif
932 localver-full = $(localver)$(localver-auto)
934 # Store (new) KERNELRELASE string in include/config/kernel.release
935 kernelrelease = $(KERNELVERSION)$(localver-full)
936 include/config/kernel.release: include/config/auto.conf FORCE
937 $(Q)rm -f $@
938 $(Q)echo $(kernelrelease) > $@
941 # Things we need to do before we recursively start building the kernel
942 # or the modules are listed in "prepare".
943 # A multi level approach is used. prepareN is processed before prepareN-1.
944 # archprepare is used in arch Makefiles and when processed asm symlink,
945 # version.h and scripts_basic is processed / created.
947 # Listed in dependency order
948 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
950 # prepare3 is used to check if we are building in a separate output directory,
951 # and if so do:
952 # 1) Check that make has not been executed in the kernel src $(srctree)
953 # 2) Create the include2 directory, used for the second asm symlink
954 prepare3: include/config/kernel.release
955 ifneq ($(KBUILD_SRC),)
956 @$(kecho) ' Using $(srctree) as source for kernel'
957 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
958 echo " $(srctree) is not clean, please run 'make mrproper'";\
959 echo " in the '$(srctree)' directory.";\
960 /bin/false; \
962 $(Q)if [ ! -d include2 ]; then \
963 mkdir -p include2; \
964 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
966 endif
968 # prepare2 creates a makefile if using a separate output directory
969 prepare2: prepare3 outputmakefile
971 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
972 include/asm include/config/auto.conf
973 $(cmd_crmodverdir)
975 archprepare: prepare1 scripts_basic
977 prepare0: archprepare FORCE
978 $(Q)$(MAKE) $(build)=.
979 $(Q)$(MAKE) $(build)=. missing-syscalls
981 # All the preparing..
982 prepare: prepare0
984 # Leave this as default for preprocessing vmlinux.lds.S, which is now
985 # done in arch/$(ARCH)/kernel/Makefile
987 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
989 # The asm symlink changes when $(ARCH) changes.
990 # Detect this and ask user to run make mrproper
991 # If asm is a stale symlink (point to dir that does not exist) remove it
992 define check-symlink
993 set -e; \
994 if [ -L include/asm ]; then \
995 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
996 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
997 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
998 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
999 exit 1; \
1000 fi; \
1001 test -e $$asmlink || rm include/asm; \
1002 elif [ -d include/asm ]; then \
1003 echo "ERROR: $@ is a directory but a symlink was expected";\
1004 exit 1; \
1006 endef
1008 # We create the target directory of the symlink if it does
1009 # not exist so the test in check-symlink works and we have a
1010 # directory for generated filesas used by some architectures.
1011 define create-symlink
1012 if [ ! -L include/asm ]; then \
1013 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
1014 if [ ! -d include/asm-$(SRCARCH) ]; then \
1015 mkdir -p include/asm-$(SRCARCH); \
1016 fi; \
1017 ln -fsn asm-$(SRCARCH) $@; \
1019 endef
1021 include/asm: FORCE
1022 $(Q)$(check-symlink)
1023 $(Q)$(create-symlink)
1025 # Generate some files
1026 # ---------------------------------------------------------------------------
1028 # KERNELRELEASE can change from a few different places, meaning version.h
1029 # needs to be updated, so this check is forced on all builds
1031 uts_len := 64
1032 define filechk_utsrelease.h
1033 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1034 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1035 exit 1; \
1036 fi; \
1037 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1038 endef
1040 define filechk_version.h
1041 (echo \#define LINUX_VERSION_CODE $(shell \
1042 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1043 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1044 endef
1046 include/linux/version.h: $(srctree)/Makefile FORCE
1047 $(call filechk,version.h)
1049 include/linux/utsrelease.h: include/config/kernel.release FORCE
1050 $(call filechk,utsrelease.h)
1052 PHONY += headerdep
1053 headerdep:
1054 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1056 # ---------------------------------------------------------------------------
1058 PHONY += depend dep
1059 depend dep:
1060 @echo '*** Warning: make $@ is unnecessary now.'
1062 # ---------------------------------------------------------------------------
1063 # Firmware install
1064 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1065 export INSTALL_FW_PATH
1067 PHONY += firmware_install
1068 firmware_install: FORCE
1069 @mkdir -p $(objtree)/firmware
1070 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1072 # ---------------------------------------------------------------------------
1073 # Kernel headers
1075 #Default location for installed headers
1076 export INSTALL_HDR_PATH = $(objtree)/usr
1078 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1079 # Find out where the Kbuild file is located to support
1080 # arch/$(ARCH)/include/asm
1081 hdr-dir = $(strip \
1082 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1083 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1085 # If we do an all arch process set dst to asm-$(hdr-arch)
1086 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1088 PHONY += __headers
1089 __headers: include/linux/version.h scripts_basic FORCE
1090 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1092 PHONY += headers_install_all
1093 headers_install_all:
1094 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1096 PHONY += headers_install
1097 headers_install: __headers
1098 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1099 $(error Headers not exportable for the $(SRCARCH) architecture))
1100 $(Q)$(MAKE) $(hdr-inst)=include
1101 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1103 PHONY += headers_check_all
1104 headers_check_all: headers_install_all
1105 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1107 PHONY += headers_check
1108 headers_check: headers_install
1109 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1110 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1112 # ---------------------------------------------------------------------------
1113 # Modules
1115 ifdef CONFIG_MODULES
1117 # By default, build modules as well
1119 all: modules
1121 # Build modules
1123 # A module can be listed more than once in obj-m resulting in
1124 # duplicate lines in modules.order files. Those are removed
1125 # using awk while concatenating to the final file.
1127 PHONY += modules
1128 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1129 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1130 @$(kecho) ' Building modules, stage 2.';
1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1132 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1135 # Target to prepare building external modules
1136 PHONY += modules_prepare
1137 modules_prepare: prepare scripts
1139 # Target to install modules
1140 PHONY += modules_install
1141 modules_install: _modinst_ _modinst_post
1143 PHONY += _modinst_
1144 _modinst_:
1145 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1146 echo "Warning: you may need to install module-init-tools"; \
1147 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1148 sleep 1; \
1150 @rm -rf $(MODLIB)/kernel
1151 @rm -f $(MODLIB)/source
1152 @mkdir -p $(MODLIB)/kernel
1153 @ln -s $(srctree) $(MODLIB)/source
1154 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1155 rm -f $(MODLIB)/build ; \
1156 ln -s $(objtree) $(MODLIB)/build ; \
1158 @cp -f $(objtree)/modules.order $(MODLIB)/
1159 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1161 # This depmod is only for convenience to give the initial
1162 # boot a modules.dep even before / is mounted read-write. However the
1163 # boot script depmod is the master version.
1164 PHONY += _modinst_post
1165 _modinst_post: _modinst_
1166 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1167 $(call cmd,depmod)
1169 else # CONFIG_MODULES
1171 # Modules not configured
1172 # ---------------------------------------------------------------------------
1174 modules modules_install: FORCE
1175 @echo
1176 @echo "The present kernel configuration has modules disabled."
1177 @echo "Type 'make config' and enable loadable module support."
1178 @echo "Then build a kernel with module support enabled."
1179 @echo
1180 @exit 1
1182 endif # CONFIG_MODULES
1185 # Cleaning is done on three levels.
1186 # make clean Delete most generated files
1187 # Leave enough to build external modules
1188 # make mrproper Delete the current configuration, and all generated files
1189 # make distclean Remove editor backup files, patch leftover files and the like
1191 # Directories & files removed with 'make clean'
1192 CLEAN_DIRS += $(MODVERDIR)
1193 CLEAN_FILES += vmlinux System.map \
1194 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1196 # Directories & files removed with 'make mrproper'
1197 MRPROPER_DIRS += include/config include2 usr/include include/generated
1198 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1199 include/linux/autoconf.h include/linux/version.h \
1200 include/linux/utsrelease.h \
1201 include/linux/bounds.h include/asm*/asm-offsets.h \
1202 Module.symvers Module.markers tags TAGS cscope*
1204 # clean - Delete most, but leave enough to build external modules
1206 clean: rm-dirs := $(CLEAN_DIRS)
1207 clean: rm-files := $(CLEAN_FILES)
1208 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1210 PHONY += $(clean-dirs) clean archclean
1211 $(clean-dirs):
1212 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1214 clean: archclean $(clean-dirs)
1215 $(call cmd,rmdirs)
1216 $(call cmd,rmfiles)
1217 @find . $(RCS_FIND_IGNORE) \
1218 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1219 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1220 -o -name '*.symtypes' -o -name 'modules.order' \
1221 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \
1222 -o -name '*.gcno' \) -type f -print | xargs rm -f
1224 # mrproper - Delete all generated files, including .config
1226 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1227 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1228 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1230 PHONY += $(mrproper-dirs) mrproper archmrproper
1231 $(mrproper-dirs):
1232 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1234 mrproper: clean archmrproper $(mrproper-dirs)
1235 $(call cmd,rmdirs)
1236 $(call cmd,rmfiles)
1238 # distclean
1240 PHONY += distclean
1242 distclean: mrproper
1243 @find $(srctree) $(RCS_FIND_IGNORE) \
1244 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1245 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1246 -o -name '.*.rej' -o -size 0 \
1247 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1248 -type f -print | xargs rm -f
1251 # Packaging of the kernel to various formats
1252 # ---------------------------------------------------------------------------
1253 # rpm target kept for backward compatibility
1254 package-dir := $(srctree)/scripts/package
1256 %pkg: include/config/kernel.release FORCE
1257 $(Q)$(MAKE) $(build)=$(package-dir) $@
1258 rpm: include/config/kernel.release FORCE
1259 $(Q)$(MAKE) $(build)=$(package-dir) $@
1262 # Brief documentation of the typical targets used
1263 # ---------------------------------------------------------------------------
1265 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1266 boards := $(notdir $(boards))
1267 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1268 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1270 help:
1271 @echo 'Cleaning targets:'
1272 @echo ' clean - Remove most generated files but keep the config and'
1273 @echo ' enough build support to build external modules'
1274 @echo ' mrproper - Remove all generated files + config + various backup files'
1275 @echo ' distclean - mrproper + remove editor backup and patch files'
1276 @echo ''
1277 @echo 'Configuration targets:'
1278 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1279 @echo ''
1280 @echo 'Other generic targets:'
1281 @echo ' all - Build all targets marked with [*]'
1282 @echo '* vmlinux - Build the bare kernel'
1283 @echo '* modules - Build all modules'
1284 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1285 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1286 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1287 @echo ' dir/ - Build all files in dir and below'
1288 @echo ' dir/file.[ois] - Build specified target only'
1289 @echo ' dir/file.ko - Build module including final link'
1290 @echo ' modules_prepare - Set up for building external modules'
1291 @echo ' tags/TAGS - Generate tags file for editors'
1292 @echo ' cscope - Generate cscope index'
1293 @echo ' kernelrelease - Output the release version string'
1294 @echo ' kernelversion - Output the version stored in Makefile'
1295 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1296 echo ' (default: $(INSTALL_HDR_PATH))'; \
1297 echo ''
1298 @echo 'Static analysers'
1299 @echo ' checkstack - Generate a list of stack hogs'
1300 @echo ' namespacecheck - Name space analysis on compiled kernel'
1301 @echo ' versioncheck - Sanity check on version.h usage'
1302 @echo ' includecheck - Check for duplicate included header files'
1303 @echo ' export_report - List the usages of all exported symbols'
1304 @echo ' headers_check - Sanity check on exported headers'
1305 @echo ' headerdep - Detect inclusion cycles in headers'; \
1306 echo ''
1307 @echo 'Kernel packaging:'
1308 @$(MAKE) $(build)=$(package-dir) help
1309 @echo ''
1310 @echo 'Documentation targets:'
1311 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1312 @echo ''
1313 @echo 'Architecture specific targets ($(SRCARCH)):'
1314 @$(if $(archhelp),$(archhelp),\
1315 echo ' No architecture specific help defined for $(SRCARCH)')
1316 @echo ''
1317 @$(if $(boards), \
1318 $(foreach b, $(boards), \
1319 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1320 echo '')
1321 @$(if $(board-dirs), \
1322 $(foreach b, $(board-dirs), \
1323 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1324 printf " %-16s - Show all of the above\\n" help-boards; \
1325 echo '')
1327 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1328 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1329 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1330 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1331 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1332 @echo ''
1333 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1334 @echo 'For further info see the ./README file'
1337 help-board-dirs := $(addprefix help-,$(board-dirs))
1339 help-boards: $(help-board-dirs)
1341 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1343 $(help-board-dirs): help-%:
1344 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1345 @$(if $(boards-per-dir), \
1346 $(foreach b, $(boards-per-dir), \
1347 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1348 echo '')
1351 # Documentation targets
1352 # ---------------------------------------------------------------------------
1353 %docs: scripts_basic FORCE
1354 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1356 else # KBUILD_EXTMOD
1359 # External module support.
1360 # When building external modules the kernel used as basis is considered
1361 # read-only, and no consistency checks are made and the make
1362 # system is not used on the basis kernel. If updates are required
1363 # in the basis kernel ordinary make commands (without M=...) must
1364 # be used.
1366 # The following are the only valid targets when building external
1367 # modules.
1368 # make M=dir clean Delete all automatically generated files
1369 # make M=dir modules Make all modules in specified dir
1370 # make M=dir Same as 'make M=dir modules'
1371 # make M=dir modules_install
1372 # Install the modules built in the module directory
1373 # Assumes install directory is already created
1375 # We are always building modules
1376 KBUILD_MODULES := 1
1377 PHONY += crmodverdir
1378 crmodverdir:
1379 $(cmd_crmodverdir)
1381 PHONY += $(objtree)/Module.symvers
1382 $(objtree)/Module.symvers:
1383 @test -e $(objtree)/Module.symvers || ( \
1384 echo; \
1385 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1386 echo " is missing; modules will have no dependencies and modversions."; \
1387 echo )
1389 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1390 PHONY += $(module-dirs) modules
1391 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1392 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1394 modules: $(module-dirs)
1395 @$(kecho) ' Building modules, stage 2.';
1396 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1398 PHONY += modules_install
1399 modules_install: _emodinst_ _emodinst_post
1401 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1402 PHONY += _emodinst_
1403 _emodinst_:
1404 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1405 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1407 PHONY += _emodinst_post
1408 _emodinst_post: _emodinst_
1409 $(call cmd,depmod)
1411 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1413 PHONY += $(clean-dirs) clean
1414 $(clean-dirs):
1415 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1417 clean: rm-dirs := $(MODVERDIR)
1418 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1419 $(KBUILD_EXTMOD)/Module.markers \
1420 $(KBUILD_EXTMOD)/modules.order
1421 clean: $(clean-dirs)
1422 $(call cmd,rmdirs)
1423 $(call cmd,rmfiles)
1424 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1425 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1426 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1427 -o -name '*.gcno' \) -type f -print | xargs rm -f
1429 help:
1430 @echo ' Building external modules.'
1431 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1432 @echo ''
1433 @echo ' modules - default target, build the module(s)'
1434 @echo ' modules_install - install the module'
1435 @echo ' clean - remove generated files in module directory only'
1436 @echo ''
1438 # Dummies...
1439 PHONY += prepare scripts
1440 prepare: ;
1441 scripts: ;
1442 endif # KBUILD_EXTMOD
1444 # Generate tags for editors
1445 # ---------------------------------------------------------------------------
1446 quiet_cmd_tags = GEN $@
1447 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1449 tags TAGS cscope: FORCE
1450 $(call cmd,tags)
1452 # Scripts to check various things for consistency
1453 # ---------------------------------------------------------------------------
1455 includecheck:
1456 find * $(RCS_FIND_IGNORE) \
1457 -name '*.[hcS]' -type f -print | sort \
1458 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1460 versioncheck:
1461 find * $(RCS_FIND_IGNORE) \
1462 -name '*.[hcS]' -type f -print | sort \
1463 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1465 namespacecheck:
1466 $(PERL) $(srctree)/scripts/namespace.pl
1468 export_report:
1469 $(PERL) $(srctree)/scripts/export_report.pl
1471 endif #ifeq ($(config-targets),1)
1472 endif #ifeq ($(mixed-targets),1)
1474 PHONY += checkstack kernelrelease kernelversion
1476 # UML needs a little special treatment here. It wants to use the host
1477 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1478 # else wants $(ARCH), including people doing cross-builds, which means
1479 # that $(SUBARCH) doesn't work here.
1480 ifeq ($(ARCH), um)
1481 CHECKSTACK_ARCH := $(SUBARCH)
1482 else
1483 CHECKSTACK_ARCH := $(ARCH)
1484 endif
1485 checkstack:
1486 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1487 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1489 kernelrelease:
1490 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1491 $(error kernelrelease not valid - run 'make prepare' to update it))
1492 kernelversion:
1493 @echo $(KERNELVERSION)
1495 # Single targets
1496 # ---------------------------------------------------------------------------
1497 # Single targets are compatible with:
1498 # - build with mixed source and output
1499 # - build with separate output dir 'make O=...'
1500 # - external modules
1502 # target-dir => where to store outputfile
1503 # build-dir => directory in kernel source tree to use
1505 ifeq ($(KBUILD_EXTMOD),)
1506 build-dir = $(patsubst %/,%,$(dir $@))
1507 target-dir = $(dir $@)
1508 else
1509 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1510 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1511 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1512 endif
1514 %.s: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516 %.i: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518 %.o: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520 %.lst: %.c prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522 %.s: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1524 %.o: %.S prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1526 %.symtypes: %.c prepare scripts FORCE
1527 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1529 # Modules
1530 /: prepare scripts FORCE
1531 $(cmd_crmodverdir)
1532 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1533 $(build)=$(build-dir)
1534 %/: prepare scripts FORCE
1535 $(cmd_crmodverdir)
1536 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1537 $(build)=$(build-dir)
1538 %.ko: prepare scripts FORCE
1539 $(cmd_crmodverdir)
1540 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1541 $(build)=$(build-dir) $(@:.ko=.o)
1542 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1544 # FIXME Should go into a make.lib or something
1545 # ===========================================================================
1547 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1548 cmd_rmdirs = rm -rf $(rm-dirs)
1550 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1551 cmd_rmfiles = rm -f $(rm-files)
1553 # Run depmod only if we have System.map and depmod is executable
1554 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1555 cmd_depmod = \
1556 if [ -r System.map -a -x $(DEPMOD) ]; then \
1557 $(DEPMOD) -ae -F System.map \
1558 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1559 $(KERNELRELEASE); \
1562 # Create temporary dir for module support files
1563 # clean it up only when building all modules
1564 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1565 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1567 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1568 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1569 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1571 quiet_cmd_as_o_S = AS $@
1572 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1574 # read all saved command lines
1576 targets := $(wildcard $(sort $(targets)))
1577 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1579 ifneq ($(cmd_files),)
1580 $(cmd_files): ; # Do not try to update included dependency files
1581 include $(cmd_files)
1582 endif
1584 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1585 # Usage:
1586 # $(Q)$(MAKE) $(clean)=dir
1587 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1589 endif # skip-makefile
1591 PHONY += FORCE
1592 FORCE:
1594 # Declare the contents of the .PHONY variable as phony. We keep that
1595 # information in a variable so we can use it in if_changed and friends.
1596 .PHONY: $(PHONY)