Merge branch 'master' of ../linux-mips
[linux-2.6/linux-dm7025.git] / Makefile
blob9e8cfffbf1c24b5c161a147d9fbf7d00d53a1750
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 26
4 EXTRAVERSION = -rc1
5 NAME = Funky Weasel is Jiggy wit it
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 ifdef V
39 ifeq ("$(origin V)", "command line")
40 KBUILD_VERBOSE = $(V)
41 endif
42 endif
43 ifndef KBUILD_VERBOSE
44 KBUILD_VERBOSE = 0
45 endif
47 # Call a source code checker (by default, "sparse") as part of the
48 # C compilation.
50 # Use 'make C=1' to enable checking of only re-compiled files.
51 # Use 'make C=2' to enable checking of *all* source files, regardless
52 # of whether they are re-compiled or not.
54 # See the file "Documentation/sparse.txt" for more details, including
55 # where to get the "sparse" utility.
57 ifdef C
58 ifeq ("$(origin C)", "command line")
59 KBUILD_CHECKSRC = $(C)
60 endif
61 endif
62 ifndef KBUILD_CHECKSRC
63 KBUILD_CHECKSRC = 0
64 endif
66 # Use make M=dir to specify directory of external module to build
67 # Old syntax make ... SUBDIRS=$PWD is still supported
68 # Setting the environment variable KBUILD_EXTMOD take precedence
69 ifdef SUBDIRS
70 KBUILD_EXTMOD ?= $(SUBDIRS)
71 endif
72 ifdef M
73 ifeq ("$(origin M)", "command line")
74 KBUILD_EXTMOD := $(M)
75 endif
76 endif
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
82 # 1) O=
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
89 # make
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # variable.
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
97 ifeq ($(KBUILD_SRC),)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
101 ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105 endif
107 # That's our default target when none is given on the command line
108 PHONY := _all
109 _all:
111 # Cancel implicit rules on top Makefile
112 $(CURDIR)/Makefile Makefile: ;
114 ifneq ($(KBUILD_OUTPUT),)
115 # Invoke a second make in the output directory, passing relevant variables
116 # check that the output directory actually exists
117 saved-output := $(KBUILD_OUTPUT)
118 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
119 $(if $(KBUILD_OUTPUT),, \
120 $(error output directory "$(saved-output)" does not exist))
122 PHONY += $(MAKECMDGOALS) sub-make
124 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
125 $(Q)@:
127 sub-make: FORCE
128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
129 KBUILD_SRC=$(CURDIR) \
130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
131 $(filter-out _all sub-make,$(MAKECMDGOALS))
133 # Leave processing to above invocation of make
134 skip-makefile := 1
135 endif # ifneq ($(KBUILD_OUTPUT),)
136 endif # ifeq ($(KBUILD_SRC),)
138 # We process the rest of the Makefile if this is the final invocation of make
139 ifeq ($(skip-makefile),)
141 # If building an external module we do not care about the all: rule
142 # but instead _all depend on modules
143 PHONY += all
144 ifeq ($(KBUILD_EXTMOD),)
145 _all: all
146 else
147 _all: modules
148 endif
150 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
151 TOPDIR := $(srctree)
152 # FIXME - TOPDIR is obsolete, use srctree/objtree
153 objtree := $(CURDIR)
154 src := $(srctree)
155 obj := $(objtree)
157 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
159 export srctree objtree VPATH TOPDIR
162 # SUBARCH tells the usermode build what the underlying arch is. That is set
163 # first, and if a usermode build is happening, the "ARCH=um" on the command
164 # line overrides the setting of ARCH below. If a native build is happening,
165 # then ARCH is assigned, getting whatever value it gets normally, and
166 # SUBARCH is subsequently ignored.
168 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
169 -e s/arm.*/arm/ -e s/sa110/arm/ \
170 -e s/s390x/s390/ -e s/parisc64/parisc/ \
171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
172 -e s/sh.*/sh/ )
174 # Cross compiling and selecting different set of gcc/bin-utils
175 # ---------------------------------------------------------------------------
177 # When performing cross compilation for other architectures ARCH shall be set
178 # to the target architecture. (See arch/* for the possibilities).
179 # ARCH can be set during invocation of make:
180 # make ARCH=ia64
181 # Another way is to have ARCH set in the environment.
182 # The default ARCH is the host where make is executed.
184 # CROSS_COMPILE specify the prefix used for all executables used
185 # during compilation. Only gcc and related bin-utils executables
186 # are prefixed with $(CROSS_COMPILE).
187 # CROSS_COMPILE can be set on the command line
188 # make CROSS_COMPILE=ia64-linux-
189 # Alternatively CROSS_COMPILE can be set in the environment.
190 # Default value for CROSS_COMPILE is not to prefix executables
191 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
193 export KBUILD_BUILDHOST := $(SUBARCH)
194 ARCH ?= mips
195 CROSS_COMPILE ?=
197 # Architecture as present in compile.h
198 UTS_MACHINE := $(ARCH)
199 SRCARCH := $(ARCH)
201 # Additional ARCH settings for x86
202 ifeq ($(ARCH),i386)
203 SRCARCH := x86
204 endif
205 ifeq ($(ARCH),x86_64)
206 SRCARCH := x86
207 endif
209 KCONFIG_CONFIG ?= .config
211 # SHELL used by kbuild
212 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
213 else if [ -x /bin/bash ]; then echo /bin/bash; \
214 else echo sh; fi ; fi)
216 HOSTCC = gcc
217 HOSTCXX = g++
218 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
219 HOSTCXXFLAGS = -O2
221 # Decide whether to build built-in, modular, or both.
222 # Normally, just do built-in.
224 KBUILD_MODULES :=
225 KBUILD_BUILTIN := 1
227 # If we have only "make modules", don't compile built-in objects.
228 # When we're building modules with modversions, we need to consider
229 # the built-in objects during the descend as well, in order to
230 # make sure the checksums are up to date before we record them.
232 ifeq ($(MAKECMDGOALS),modules)
233 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
234 endif
236 # If we have "make <whatever> modules", compile modules
237 # in addition to whatever we do anyway.
238 # Just "make" or "make all" shall build modules as well
240 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
241 KBUILD_MODULES := 1
242 endif
244 ifeq ($(MAKECMDGOALS),)
245 KBUILD_MODULES := 1
246 endif
248 export KBUILD_MODULES KBUILD_BUILTIN
249 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
251 # Beautify output
252 # ---------------------------------------------------------------------------
254 # Normally, we echo the whole command before executing it. By making
255 # that echo $($(quiet)$(cmd)), we now have the possibility to set
256 # $(quiet) to choose other forms of output instead, e.g.
258 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
259 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
261 # If $(quiet) is empty, the whole command will be printed.
262 # If it is set to "quiet_", only the short version will be printed.
263 # If it is set to "silent_", nothing will be printed at all, since
264 # the variable $(silent_cmd_cc_o_c) doesn't exist.
266 # A simple variant is to prefix commands with $(Q) - that's useful
267 # for commands that shall be hidden in non-verbose mode.
269 # $(Q)ln $@ :<
271 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
272 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
274 ifeq ($(KBUILD_VERBOSE),1)
275 quiet =
277 else
278 quiet=quiet_
279 Q = @
280 endif
282 # If the user is running make -s (silent mode), suppress echoing of
283 # commands
285 ifneq ($(findstring s,$(MAKEFLAGS)),)
286 quiet=silent_
287 endif
289 export quiet Q KBUILD_VERBOSE
292 # Look for make include files relative to root of kernel src
293 MAKEFLAGS += --include-dir=$(srctree)
295 # We need some generic definitions (do not try to remake the file).
296 $(srctree)/scripts/Kbuild.include: ;
297 include $(srctree)/scripts/Kbuild.include
299 # Make variables (CC, etc...)
301 AS = $(CROSS_COMPILE)as
302 LD = $(CROSS_COMPILE)ld
303 CC = $(CROSS_COMPILE)gcc
304 CPP = $(CC) -E
305 AR = $(CROSS_COMPILE)ar
306 NM = $(CROSS_COMPILE)nm
307 STRIP = $(CROSS_COMPILE)strip
308 OBJCOPY = $(CROSS_COMPILE)objcopy
309 OBJDUMP = $(CROSS_COMPILE)objdump
310 AWK = awk
311 GENKSYMS = scripts/genksyms/genksyms
312 DEPMOD = /sbin/depmod
313 KALLSYMS = scripts/kallsyms
314 PERL = perl
315 CHECK = sparse
317 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
318 MODFLAGS = -DMODULE
319 CFLAGS_MODULE = $(MODFLAGS)
320 AFLAGS_MODULE = $(MODFLAGS)
321 LDFLAGS_MODULE =
322 CFLAGS_KERNEL =
323 AFLAGS_KERNEL =
326 # Use LINUXINCLUDE when you must reference the include/ directory.
327 # Needed to be compatible with the O= option
328 LINUXINCLUDE := -Iinclude \
329 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
330 -include include/linux/autoconf.h
332 KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
334 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
335 -fno-strict-aliasing -fno-common \
336 -Werror-implicit-function-declaration
337 KBUILD_AFLAGS := -D__ASSEMBLY__
339 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
340 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
341 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
343 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
344 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
345 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
346 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
348 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
349 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
350 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
352 # When compiling out-of-tree modules, put MODVERDIR in the module
353 # tree rather than in the kernel tree. The kernel tree might
354 # even be read-only.
355 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
357 # Files to ignore in find ... statements
359 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
360 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
362 # ===========================================================================
363 # Rules shared between *config targets and build targets
365 # Basic helpers built in scripts/
366 PHONY += scripts_basic
367 scripts_basic:
368 $(Q)$(MAKE) $(build)=scripts/basic
370 # To avoid any implicit rule to kick in, define an empty command.
371 scripts/basic/%: scripts_basic ;
373 PHONY += outputmakefile
374 # outputmakefile generates a Makefile in the output directory, if using a
375 # separate output directory. This allows convenient use of make in the
376 # output directory.
377 outputmakefile:
378 ifneq ($(KBUILD_SRC),)
379 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
380 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
381 endif
383 # To make sure we do not include .config for any of the *config targets
384 # catch them early, and hand them over to scripts/kconfig/Makefile
385 # It is allowed to specify more targets when calling make, including
386 # mixing *config targets and build targets.
387 # For example 'make oldconfig all'.
388 # Detect when mixed targets is specified, and make a second invocation
389 # of make so .config is not included in this case either (for *config).
391 no-dot-config-targets := clean mrproper distclean \
392 cscope TAGS tags help %docs check% \
393 include/linux/version.h headers_% \
394 kernelrelease kernelversion
396 config-targets := 0
397 mixed-targets := 0
398 dot-config := 1
400 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
401 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
402 dot-config := 0
403 endif
404 endif
406 ifeq ($(KBUILD_EXTMOD),)
407 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
408 config-targets := 1
409 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
410 mixed-targets := 1
411 endif
412 endif
413 endif
415 ifeq ($(mixed-targets),1)
416 # ===========================================================================
417 # We're called with mixed targets (*config and build targets).
418 # Handle them one by one.
420 %:: FORCE
421 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
423 else
424 ifeq ($(config-targets),1)
425 # ===========================================================================
426 # *config targets only - make sure prerequisites are updated, and descend
427 # in scripts/kconfig to make the *config target
429 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
430 # KBUILD_DEFCONFIG may point out an alternative default configuration
431 # used for 'make defconfig'
432 include $(srctree)/arch/$(SRCARCH)/Makefile
433 export KBUILD_DEFCONFIG
435 config %config: scripts_basic outputmakefile FORCE
436 $(Q)mkdir -p include/linux include/config
437 $(Q)$(MAKE) $(build)=scripts/kconfig $@
439 else
440 # ===========================================================================
441 # Build targets only - this includes vmlinux, arch specific targets, clean
442 # targets and others. In general all targets except *config targets.
444 ifeq ($(KBUILD_EXTMOD),)
445 # Additional helpers built in scripts/
446 # Carefully list dependencies so we do not try to build scripts twice
447 # in parallel
448 PHONY += scripts
449 scripts: scripts_basic include/config/auto.conf
450 $(Q)$(MAKE) $(build)=$(@)
452 # Objects we will link into vmlinux / subdirs we need to visit
453 init-y := init/
454 drivers-y := drivers/ sound/
455 net-y := net/
456 libs-y := lib/
457 core-y := usr/
458 endif # KBUILD_EXTMOD
460 ifeq ($(dot-config),1)
461 # Read in config
462 -include include/config/auto.conf
464 ifeq ($(KBUILD_EXTMOD),)
465 # Read in dependencies to all Kconfig* files, make sure to run
466 # oldconfig if changes are detected.
467 -include include/config/auto.conf.cmd
469 # To avoid any implicit rule to kick in, define an empty command
470 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
472 # If .config is newer than include/config/auto.conf, someone tinkered
473 # with it and forgot to run make oldconfig.
474 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
475 # we execute the config step to be sure to catch updated Kconfig files
476 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
477 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
478 else
479 # external modules needs include/linux/autoconf.h and include/config/auto.conf
480 # but do not care if they are up-to-date. Use auto.conf to trigger the test
481 PHONY += include/config/auto.conf
483 include/config/auto.conf:
484 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
485 echo; \
486 echo " ERROR: Kernel configuration is invalid."; \
487 echo " include/linux/autoconf.h or $@ are missing."; \
488 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
489 echo; \
490 /bin/false)
492 endif # KBUILD_EXTMOD
494 else
495 # Dummy target needed, because used as prerequisite
496 include/config/auto.conf: ;
497 endif # $(dot-config)
499 # The all: target is the default when no target is given on the
500 # command line.
501 # This allow a user to issue only 'make' to build a kernel including modules
502 # Defaults vmlinux but it is usually overridden in the arch makefile
503 all: vmlinux
505 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
506 KBUILD_CFLAGS += -Os
507 else
508 KBUILD_CFLAGS += -O2
509 endif
511 ifneq (CONFIG_FRAME_WARN,0)
512 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
513 endif
515 # Force gcc to behave correct even for buggy distributions
516 # Arch Makefiles may override this setting
517 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
519 include $(srctree)/arch/$(SRCARCH)/Makefile
521 ifdef CONFIG_FRAME_POINTER
522 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
523 else
524 KBUILD_CFLAGS += -fomit-frame-pointer
525 endif
527 ifdef CONFIG_DEBUG_INFO
528 KBUILD_CFLAGS += -g
529 KBUILD_AFLAGS += -gdwarf-2
530 endif
532 # We trigger additional mismatches with less inlining
533 ifdef CONFIG_DEBUG_SECTION_MISMATCH
534 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
535 endif
537 # arch Makefile may override CC so keep this after arch Makefile is included
538 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
539 CHECKFLAGS += $(NOSTDINC_FLAGS)
541 # warn about C99 declaration after statement
542 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
544 # disable pointer signed / unsigned warnings in gcc 4.0
545 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
547 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
548 # But warn user when we do so
549 warn-assign = \
550 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
552 ifneq ($(KCPPFLAGS),)
553 $(call warn-assign,CPPFLAGS)
554 KBUILD_CPPFLAGS += $(KCPPFLAGS)
555 endif
556 ifneq ($(KAFLAGS),)
557 $(call warn-assign,AFLAGS)
558 KBUILD_AFLAGS += $(KAFLAGS)
559 endif
560 ifneq ($(KCFLAGS),)
561 $(call warn-assign,CFLAGS)
562 KBUILD_CFLAGS += $(KCFLAGS)
563 endif
565 # Use --build-id when available.
566 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
567 $(call ld-option, -Wl$(comma)--build-id,))
568 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
569 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
571 # Default kernel image to build when no specific target is given.
572 # KBUILD_IMAGE may be overruled on the command line or
573 # set in the environment
574 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
575 # this default value
576 export KBUILD_IMAGE ?= vmlinux
579 # INSTALL_PATH specifies where to place the updated kernel and system map
580 # images. Default is /boot, but you can set it to other values
581 export INSTALL_PATH ?= /boot
584 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
585 # relocations required by build roots. This is not defined in the
586 # makefile but the argument can be passed to make if needed.
589 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
590 export MODLIB
593 # INSTALL_MOD_STRIP, if defined, will cause modules to be
594 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
595 # the default option --strip-debug will be used. Otherwise,
596 # INSTALL_MOD_STRIP will used as the options to the strip command.
598 ifdef INSTALL_MOD_STRIP
599 ifeq ($(INSTALL_MOD_STRIP),1)
600 mod_strip_cmd = $(STRIP) --strip-debug
601 else
602 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
603 endif # INSTALL_MOD_STRIP=1
604 else
605 mod_strip_cmd = true
606 endif # INSTALL_MOD_STRIP
607 export mod_strip_cmd
610 ifeq ($(KBUILD_EXTMOD),)
611 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
613 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
614 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
615 $(net-y) $(net-m) $(libs-y) $(libs-m)))
617 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
618 $(init-n) $(init-) \
619 $(core-n) $(core-) $(drivers-n) $(drivers-) \
620 $(net-n) $(net-) $(libs-n) $(libs-))))
622 init-y := $(patsubst %/, %/built-in.o, $(init-y))
623 core-y := $(patsubst %/, %/built-in.o, $(core-y))
624 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
625 net-y := $(patsubst %/, %/built-in.o, $(net-y))
626 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
627 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
628 libs-y := $(libs-y1) $(libs-y2)
630 # Build vmlinux
631 # ---------------------------------------------------------------------------
632 # vmlinux is built from the objects selected by $(vmlinux-init) and
633 # $(vmlinux-main). Most are built-in.o files from top-level directories
634 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
635 # Ordering when linking is important, and $(vmlinux-init) must be first.
637 # vmlinux
640 # +-< $(vmlinux-init)
641 # | +--< init/version.o + more
643 # +--< $(vmlinux-main)
644 # | +--< driver/built-in.o mm/built-in.o + more
646 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
648 # vmlinux version (uname -v) cannot be updated during normal
649 # descending-into-subdirs phase since we do not yet know if we need to
650 # update vmlinux.
651 # Therefore this step is delayed until just before final link of vmlinux -
652 # except in the kallsyms case where it is done just before adding the
653 # symbols to the kernel.
655 # System.map is generated to document addresses of all kernel symbols
657 vmlinux-init := $(head-y) $(init-y)
658 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
659 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
660 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
661 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
663 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
664 # May be overridden by arch/$(ARCH)/Makefile
665 quiet_cmd_vmlinux__ ?= LD $@
666 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
667 -T $(vmlinux-lds) $(vmlinux-init) \
668 --start-group $(vmlinux-main) --end-group \
669 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
671 # Generate new vmlinux version
672 quiet_cmd_vmlinux_version = GEN .version
673 cmd_vmlinux_version = set -e; \
674 if [ ! -r .version ]; then \
675 rm -f .version; \
676 echo 1 >.version; \
677 else \
678 mv .version .old_version; \
679 expr 0$$(cat .old_version) + 1 >.version; \
680 fi; \
681 $(MAKE) $(build)=init
683 # Generate System.map
684 quiet_cmd_sysmap = SYSMAP
685 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
687 # Link of vmlinux
688 # If CONFIG_KALLSYMS is set .version is already updated
689 # Generate System.map and verify that the content is consistent
690 # Use + in front of the vmlinux_version rule to silent warning with make -j2
691 # First command is ':' to allow us to use + in front of the rule
692 define rule_vmlinux__
694 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
696 $(call cmd,vmlinux__)
697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
699 $(Q)$(if $($(quiet)cmd_sysmap), \
700 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
701 $(cmd_sysmap) $@ System.map; \
702 if [ $$? -ne 0 ]; then \
703 rm -f $@; \
704 /bin/false; \
706 $(verify_kallsyms)
707 endef
710 ifdef CONFIG_KALLSYMS
711 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
712 # It's a three stage process:
713 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
714 # empty
715 # Running kallsyms on that gives us .tmp_kallsyms1.o with
716 # the right size - vmlinux version (uname -v) is updated during this step
717 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
718 # but due to the added section, some addresses have shifted.
719 # From here, we generate a correct .tmp_kallsyms2.o
720 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
721 # o Verify that the System.map from vmlinux matches the map from
722 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
723 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
724 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
725 # temporary bypass to allow the kernel to be built while the
726 # maintainers work out what went wrong with kallsyms.
728 ifdef CONFIG_KALLSYMS_EXTRA_PASS
729 last_kallsyms := 3
730 else
731 last_kallsyms := 2
732 endif
734 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
736 define verify_kallsyms
737 $(Q)$(if $($(quiet)cmd_sysmap), \
738 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
739 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
740 $(Q)cmp -s System.map .tmp_System.map || \
741 (echo Inconsistent kallsyms data; \
742 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
743 rm .tmp_kallsyms* ; /bin/false )
744 endef
746 # Update vmlinux version before link
747 # Use + in front of this rule to silent warning about make -j1
748 # First command is ':' to allow us to use + in front of this rule
749 cmd_ksym_ld = $(cmd_vmlinux__)
750 define rule_ksym_ld
752 +$(call cmd,vmlinux_version)
753 $(call cmd,vmlinux__)
754 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
755 endef
757 # Generate .S file with all kernel symbols
758 quiet_cmd_kallsyms = KSYM $@
759 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
760 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
762 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
763 $(call if_changed_dep,as_o_S)
765 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
766 $(call cmd,kallsyms)
768 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
769 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
770 $(call if_changed_rule,ksym_ld)
772 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
773 $(call if_changed,vmlinux__)
775 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
776 $(call if_changed,vmlinux__)
778 # Needs to visit scripts/ before $(KALLSYMS) can be used.
779 $(KALLSYMS): scripts ;
781 # Generate some data for debugging strange kallsyms problems
782 debug_kallsyms: .tmp_map$(last_kallsyms)
784 .tmp_map%: .tmp_vmlinux% FORCE
785 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
787 .tmp_map3: .tmp_map2
789 .tmp_map2: .tmp_map1
791 endif # ifdef CONFIG_KALLSYMS
793 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
794 # relevant sections renamed as per the linker script.
795 quiet_cmd_vmlinux-modpost = LD $@
796 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
797 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
798 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
799 define rule_vmlinux-modpost
801 +$(call cmd,vmlinux-modpost)
802 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
803 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
804 endef
806 # vmlinux image - including updated kernel symbols
807 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
808 ifdef CONFIG_HEADERS_CHECK
809 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
810 endif
811 ifdef CONFIG_SAMPLES
812 $(Q)$(MAKE) $(build)=samples
813 endif
814 $(call vmlinux-modpost)
815 $(call if_changed_rule,vmlinux__)
816 $(Q)rm -f .old_version
818 # build vmlinux.o first to catch section mismatch errors early
819 ifdef CONFIG_KALLSYMS
820 .tmp_vmlinux1: vmlinux.o
821 endif
823 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
824 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
825 $(call if_changed_rule,vmlinux-modpost)
827 # The actual objects are generated when descending,
828 # make sure no implicit rule kicks in
829 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
831 # Handle descending into subdirectories listed in $(vmlinux-dirs)
832 # Preset locale variables to speed up the build process. Limit locale
833 # tweaks to this spot to avoid wrong language settings when running
834 # make menuconfig etc.
835 # Error messages still appears in the original language
837 PHONY += $(vmlinux-dirs)
838 $(vmlinux-dirs): prepare scripts
839 $(Q)$(MAKE) $(build)=$@
841 # Build the kernel release string
843 # The KERNELRELEASE value built here is stored in the file
844 # include/config/kernel.release, and is used when executing several
845 # make targets, such as "make install" or "make modules_install."
847 # The eventual kernel release string consists of the following fields,
848 # shown in a hierarchical format to show how smaller parts are concatenated
849 # to form the larger and final value, with values coming from places like
850 # the Makefile, kernel config options, make command line options and/or
851 # SCM tag information.
853 # $(KERNELVERSION)
854 # $(VERSION) eg, 2
855 # $(PATCHLEVEL) eg, 6
856 # $(SUBLEVEL) eg, 18
857 # $(EXTRAVERSION) eg, -rc6
858 # $(localver-full)
859 # $(localver)
860 # localversion* (files without backups, containing '~')
861 # $(CONFIG_LOCALVERSION) (from kernel config setting)
862 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
863 # ./scripts/setlocalversion (SCM tag, if one exists)
864 # $(LOCALVERSION) (from make command line if provided)
866 # Note how the final $(localver-auto) string is included *only* if the
867 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
868 # moment, only git is supported but other SCMs can edit the script
869 # scripts/setlocalversion and add the appropriate checks as needed.
871 pattern = ".*/localversion[^~]*"
872 string = $(shell cat /dev/null \
873 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
875 localver = $(subst $(space),, $(string) \
876 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
878 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
879 # and if the SCM is know a tag from the SCM is appended.
880 # The appended tag is determined by the SCM used.
882 # Currently, only git is supported.
883 # Other SCMs can edit scripts/setlocalversion and add the appropriate
884 # checks as needed.
885 ifdef CONFIG_LOCALVERSION_AUTO
886 _localver-auto = $(shell $(CONFIG_SHELL) \
887 $(srctree)/scripts/setlocalversion $(srctree))
888 localver-auto = $(LOCALVERSION)$(_localver-auto)
889 endif
891 localver-full = $(localver)$(localver-auto)
893 # Store (new) KERNELRELASE string in include/config/kernel.release
894 kernelrelease = $(KERNELVERSION)$(localver-full)
895 include/config/kernel.release: include/config/auto.conf FORCE
896 $(Q)rm -f $@
897 $(Q)echo $(kernelrelease) > $@
900 # Things we need to do before we recursively start building the kernel
901 # or the modules are listed in "prepare".
902 # A multi level approach is used. prepareN is processed before prepareN-1.
903 # archprepare is used in arch Makefiles and when processed asm symlink,
904 # version.h and scripts_basic is processed / created.
906 # Listed in dependency order
907 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
909 # prepare3 is used to check if we are building in a separate output directory,
910 # and if so do:
911 # 1) Check that make has not been executed in the kernel src $(srctree)
912 # 2) Create the include2 directory, used for the second asm symlink
913 prepare3: include/config/kernel.release
914 ifneq ($(KBUILD_SRC),)
915 @echo ' Using $(srctree) as source for kernel'
916 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
917 echo " $(srctree) is not clean, please run 'make mrproper'";\
918 echo " in the '$(srctree)' directory.";\
919 /bin/false; \
921 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
922 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
923 endif
925 # prepare2 creates a makefile if using a separate output directory
926 prepare2: prepare3 outputmakefile
928 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
929 include/asm include/config/auto.conf
930 $(cmd_crmodverdir)
932 archprepare: prepare1 scripts_basic
934 prepare0: archprepare FORCE
935 $(Q)$(MAKE) $(build)=.
936 $(Q)$(MAKE) $(build)=. missing-syscalls
938 # All the preparing..
939 prepare: prepare0
941 # Leave this as default for preprocessing vmlinux.lds.S, which is now
942 # done in arch/$(ARCH)/kernel/Makefile
944 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
946 # The asm symlink changes when $(ARCH) changes.
947 # Detect this and ask user to run make mrproper
949 include/asm: FORCE
950 $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`; \
951 if [ -L include/asm ]; then \
952 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
953 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
954 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
955 exit 1; \
956 fi; \
957 else \
958 echo ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
959 if [ ! -d include ]; then \
960 mkdir -p include; \
961 fi; \
962 ln -fsn asm-$(SRCARCH) $@; \
965 # Generate some files
966 # ---------------------------------------------------------------------------
968 # KERNELRELEASE can change from a few different places, meaning version.h
969 # needs to be updated, so this check is forced on all builds
971 uts_len := 64
972 define filechk_utsrelease.h
973 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
974 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
975 exit 1; \
976 fi; \
977 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
978 endef
980 define filechk_version.h
981 (echo \#define LINUX_VERSION_CODE $(shell \
982 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
983 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
984 endef
986 include/linux/version.h: $(srctree)/Makefile FORCE
987 $(call filechk,version.h)
989 include/linux/utsrelease.h: include/config/kernel.release FORCE
990 $(call filechk,utsrelease.h)
992 # ---------------------------------------------------------------------------
994 PHONY += depend dep
995 depend dep:
996 @echo '*** Warning: make $@ is unnecessary now.'
998 # ---------------------------------------------------------------------------
999 # Kernel headers
1000 INSTALL_HDR_PATH=$(objtree)/usr
1001 export INSTALL_HDR_PATH
1003 HDRFILTER=generic i386 x86_64
1004 HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
1006 PHONY += headers_install_all
1007 headers_install_all: include/linux/version.h scripts_basic FORCE
1008 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1009 $(Q)for arch in $(HDRARCHES); do \
1010 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
1011 done
1013 PHONY += headers_install
1014 headers_install: include/linux/version.h scripts_basic FORCE
1015 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1016 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
1017 exit 1 ; fi
1018 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1019 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
1021 PHONY += headers_check_all
1022 headers_check_all: headers_install_all
1023 $(Q)for arch in $(HDRARCHES); do \
1024 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
1025 done
1027 PHONY += headers_check
1028 headers_check: headers_install
1029 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
1031 # ---------------------------------------------------------------------------
1032 # Modules
1034 ifdef CONFIG_MODULES
1036 # By default, build modules as well
1038 all: modules
1040 # Build modules
1042 # A module can be listed more than once in obj-m resulting in
1043 # duplicate lines in modules.order files. Those are removed
1044 # using awk while concatenating to the final file.
1046 PHONY += modules
1047 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1048 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1049 @echo ' Building modules, stage 2.';
1050 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1053 # Target to prepare building external modules
1054 PHONY += modules_prepare
1055 modules_prepare: prepare scripts
1057 # Target to install modules
1058 PHONY += modules_install
1059 modules_install: _modinst_ _modinst_post
1061 PHONY += _modinst_
1062 _modinst_:
1063 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1064 echo "Warning: you may need to install module-init-tools"; \
1065 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1066 sleep 1; \
1068 @rm -rf $(MODLIB)/kernel
1069 @rm -f $(MODLIB)/source
1070 @mkdir -p $(MODLIB)/kernel
1071 @ln -s $(srctree) $(MODLIB)/source
1072 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1073 rm -f $(MODLIB)/build ; \
1074 ln -s $(objtree) $(MODLIB)/build ; \
1076 @cp -f $(objtree)/modules.order $(MODLIB)/
1077 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1079 # This depmod is only for convenience to give the initial
1080 # boot a modules.dep even before / is mounted read-write. However the
1081 # boot script depmod is the master version.
1082 PHONY += _modinst_post
1083 _modinst_post: _modinst_
1084 $(call cmd,depmod)
1086 else # CONFIG_MODULES
1088 # Modules not configured
1089 # ---------------------------------------------------------------------------
1091 modules modules_install: FORCE
1092 @echo
1093 @echo "The present kernel configuration has modules disabled."
1094 @echo "Type 'make config' and enable loadable module support."
1095 @echo "Then build a kernel with module support enabled."
1096 @echo
1097 @exit 1
1099 endif # CONFIG_MODULES
1102 # Cleaning is done on three levels.
1103 # make clean Delete most generated files
1104 # Leave enough to build external modules
1105 # make mrproper Delete the current configuration, and all generated files
1106 # make distclean Remove editor backup files, patch leftover files and the like
1108 # Directories & files removed with 'make clean'
1109 CLEAN_DIRS += $(MODVERDIR)
1110 CLEAN_FILES += vmlinux System.map \
1111 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1113 # Directories & files removed with 'make mrproper'
1114 MRPROPER_DIRS += include/config include2 usr/include
1115 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1116 include/linux/autoconf.h include/linux/version.h \
1117 include/linux/utsrelease.h \
1118 Module.symvers tags TAGS cscope*
1120 # clean - Delete most, but leave enough to build external modules
1122 clean: rm-dirs := $(CLEAN_DIRS)
1123 clean: rm-files := $(CLEAN_FILES)
1124 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1126 PHONY += $(clean-dirs) clean archclean
1127 $(clean-dirs):
1128 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1130 clean: archclean $(clean-dirs)
1131 $(call cmd,rmdirs)
1132 $(call cmd,rmfiles)
1133 @find . $(RCS_FIND_IGNORE) \
1134 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1135 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1136 -o -name '*.symtypes' -o -name 'modules.order' \) \
1137 -type f -print | xargs rm -f
1139 # mrproper - Delete all generated files, including .config
1141 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1142 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1143 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1145 PHONY += $(mrproper-dirs) mrproper archmrproper
1146 $(mrproper-dirs):
1147 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1149 mrproper: clean archmrproper $(mrproper-dirs)
1150 $(call cmd,rmdirs)
1151 $(call cmd,rmfiles)
1153 # distclean
1155 PHONY += distclean
1157 distclean: mrproper
1158 @find $(srctree) $(RCS_FIND_IGNORE) \
1159 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1160 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1161 -o -name '.*.rej' -o -size 0 \
1162 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1163 -type f -print | xargs rm -f
1166 # Packaging of the kernel to various formats
1167 # ---------------------------------------------------------------------------
1168 # rpm target kept for backward compatibility
1169 package-dir := $(srctree)/scripts/package
1171 %pkg: include/config/kernel.release FORCE
1172 $(Q)$(MAKE) $(build)=$(package-dir) $@
1173 rpm: include/config/kernel.release FORCE
1174 $(Q)$(MAKE) $(build)=$(package-dir) $@
1177 # Brief documentation of the typical targets used
1178 # ---------------------------------------------------------------------------
1180 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1181 boards := $(notdir $(boards))
1182 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1183 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1185 help:
1186 @echo 'Cleaning targets:'
1187 @echo ' clean - Remove most generated files but keep the config and'
1188 @echo ' enough build support to build external modules'
1189 @echo ' mrproper - Remove all generated files + config + various backup files'
1190 @echo ' distclean - mrproper + remove editor backup and patch files'
1191 @echo ''
1192 @echo 'Configuration targets:'
1193 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1194 @echo ''
1195 @echo 'Other generic targets:'
1196 @echo ' all - Build all targets marked with [*]'
1197 @echo '* vmlinux - Build the bare kernel'
1198 @echo '* modules - Build all modules'
1199 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1200 @echo ' dir/ - Build all files in dir and below'
1201 @echo ' dir/file.[ois] - Build specified target only'
1202 @echo ' dir/file.ko - Build module including final link'
1203 @echo ' prepare - Set up for building external modules'
1204 @echo ' tags/TAGS - Generate tags file for editors'
1205 @echo ' cscope - Generate cscope index'
1206 @echo ' kernelrelease - Output the release version string'
1207 @echo ' kernelversion - Output the version stored in Makefile'
1208 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1209 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1210 echo ' (default: $(INSTALL_HDR_PATH))'; \
1212 @echo ''
1213 @echo 'Static analysers'
1214 @echo ' checkstack - Generate a list of stack hogs'
1215 @echo ' namespacecheck - Name space analysis on compiled kernel'
1216 @echo ' versioncheck - Sanity check on version.h usage'
1217 @echo ' includecheck - Check for duplicate included header files'
1218 @echo ' export_report - List the usages of all exported symbols'
1219 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
1220 echo ' headers_check - Sanity check on exported headers'; \
1222 @echo ''
1223 @echo 'Kernel packaging:'
1224 @$(MAKE) $(build)=$(package-dir) help
1225 @echo ''
1226 @echo 'Documentation targets:'
1227 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1228 @echo ''
1229 @echo 'Architecture specific targets ($(SRCARCH)):'
1230 @$(if $(archhelp),$(archhelp),\
1231 echo ' No architecture specific help defined for $(SRCARCH)')
1232 @echo ''
1233 @$(if $(boards), \
1234 $(foreach b, $(boards), \
1235 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1236 echo '')
1237 @$(if $(board-dirs), \
1238 $(foreach b, $(board-dirs), \
1239 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1240 printf " %-16s - Show all of the above\\n" help-boards; \
1241 echo '')
1243 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1244 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1245 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1246 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1247 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1248 @echo ''
1249 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1250 @echo 'For further info see the ./README file'
1253 help-board-dirs := $(addprefix help-,$(board-dirs))
1255 help-boards: $(help-board-dirs)
1257 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1259 $(help-board-dirs): help-%:
1260 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1261 @$(if $(boards-per-dir), \
1262 $(foreach b, $(boards-per-dir), \
1263 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1264 echo '')
1267 # Documentation targets
1268 # ---------------------------------------------------------------------------
1269 %docs: scripts_basic FORCE
1270 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1272 else # KBUILD_EXTMOD
1275 # External module support.
1276 # When building external modules the kernel used as basis is considered
1277 # read-only, and no consistency checks are made and the make
1278 # system is not used on the basis kernel. If updates are required
1279 # in the basis kernel ordinary make commands (without M=...) must
1280 # be used.
1282 # The following are the only valid targets when building external
1283 # modules.
1284 # make M=dir clean Delete all automatically generated files
1285 # make M=dir modules Make all modules in specified dir
1286 # make M=dir Same as 'make M=dir modules'
1287 # make M=dir modules_install
1288 # Install the modules built in the module directory
1289 # Assumes install directory is already created
1291 # We are always building modules
1292 KBUILD_MODULES := 1
1293 PHONY += crmodverdir
1294 crmodverdir:
1295 $(cmd_crmodverdir)
1297 PHONY += $(objtree)/Module.symvers
1298 $(objtree)/Module.symvers:
1299 @test -e $(objtree)/Module.symvers || ( \
1300 echo; \
1301 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1302 echo " is missing; modules will have no dependencies and modversions."; \
1303 echo )
1305 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1306 PHONY += $(module-dirs) modules
1307 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1308 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1310 modules: $(module-dirs)
1311 @echo ' Building modules, stage 2.';
1312 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1314 PHONY += modules_install
1315 modules_install: _emodinst_ _emodinst_post
1317 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1318 PHONY += _emodinst_
1319 _emodinst_:
1320 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1321 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1323 PHONY += _emodinst_post
1324 _emodinst_post: _emodinst_
1325 $(call cmd,depmod)
1327 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1329 PHONY += $(clean-dirs) clean
1330 $(clean-dirs):
1331 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1333 clean: rm-dirs := $(MODVERDIR)
1334 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1335 clean: $(clean-dirs)
1336 $(call cmd,rmdirs)
1337 $(call cmd,rmfiles)
1338 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1339 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1340 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1341 -type f -print | xargs rm -f
1343 help:
1344 @echo ' Building external modules.'
1345 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1346 @echo ''
1347 @echo ' modules - default target, build the module(s)'
1348 @echo ' modules_install - install the module'
1349 @echo ' clean - remove generated files in module directory only'
1350 @echo ''
1352 # Dummies...
1353 PHONY += prepare scripts
1354 prepare: ;
1355 scripts: ;
1356 endif # KBUILD_EXTMOD
1358 # Generate tags for editors
1359 # ---------------------------------------------------------------------------
1361 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1362 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1363 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1365 ifeq ($(src),$(obj))
1366 __srctree =
1367 else
1368 __srctree = $(srctree)/
1369 endif
1371 ifeq ($(ALLSOURCE_ARCHS),)
1372 ifeq ($(ARCH),um)
1373 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1374 else
1375 ALLINCLUDE_ARCHS := $(SRCARCH)
1376 endif
1377 else
1378 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1379 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1380 endif
1382 ALLSOURCE_ARCHS := $(SRCARCH)
1384 define find-sources
1385 ( for arch in $(ALLSOURCE_ARCHS) ; do \
1386 find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1387 -name $1 -print; \
1388 done ; \
1389 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1390 -name $1 -print; \
1391 find $(__srctree)include $(RCS_FIND_IGNORE) \
1392 \( -name config -o -name 'asm-*' \) -prune \
1393 -o -name $1 -print; \
1394 for arch in $(ALLINCLUDE_ARCHS) ; do \
1395 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1396 -name $1 -print; \
1397 done ; \
1398 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1399 -name $1 -print; \
1400 find $(__srctree) $(RCS_FIND_IGNORE) \
1401 \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1402 -name $1 -print; \
1404 endef
1406 define all-sources
1407 $(call find-sources,'*.[chS]')
1408 endef
1409 define all-kconfigs
1410 $(call find-sources,'Kconfig*')
1411 endef
1412 define all-defconfigs
1413 $(call find-sources,'defconfig')
1414 endef
1416 define xtags
1417 if $1 --version 2>&1 | grep -iq exuberant; then \
1418 $(all-sources) | xargs $1 -a \
1419 -I __initdata,__exitdata,__acquires,__releases \
1420 -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1421 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1422 --extra=+f --c-kinds=+px \
1423 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1424 $(all-kconfigs) | xargs $1 -a \
1425 --langdef=kconfig \
1426 --language-force=kconfig \
1427 --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1428 $(all-defconfigs) | xargs -r $1 -a \
1429 --langdef=dotconfig \
1430 --language-force=dotconfig \
1431 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1432 elif $1 --version 2>&1 | grep -iq emacs; then \
1433 $(all-sources) | xargs $1 -a; \
1434 $(all-kconfigs) | xargs $1 -a \
1435 --regex='/^[ \t]*(menu|)config[ \t]+\([a-zA-Z0-9_]+\)/\2/'; \
1436 $(all-defconfigs) | xargs -r $1 -a \
1437 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1438 else \
1439 $(all-sources) | xargs $1 -a; \
1441 endef
1443 quiet_cmd_cscope-file = FILELST cscope.files
1444 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1446 quiet_cmd_cscope = MAKE cscope.out
1447 cmd_cscope = cscope -b
1449 cscope: FORCE
1450 $(call cmd,cscope-file)
1451 $(call cmd,cscope)
1453 quiet_cmd_TAGS = MAKE $@
1454 define cmd_TAGS
1455 rm -f $@; \
1456 $(call xtags,etags)
1457 endef
1459 TAGS: FORCE
1460 $(call cmd,TAGS)
1462 quiet_cmd_tags = MAKE $@
1463 define cmd_tags
1464 rm -f $@; \
1465 $(call xtags,ctags)
1466 endef
1468 tags: FORCE
1469 $(call cmd,tags)
1472 # Scripts to check various things for consistency
1473 # ---------------------------------------------------------------------------
1475 includecheck:
1476 find * $(RCS_FIND_IGNORE) \
1477 -name '*.[hcS]' -type f -print | sort \
1478 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1480 versioncheck:
1481 find * $(RCS_FIND_IGNORE) \
1482 -name '*.[hcS]' -type f -print | sort \
1483 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1485 namespacecheck:
1486 $(PERL) $(srctree)/scripts/namespace.pl
1488 export_report:
1489 $(PERL) $(srctree)/scripts/export_report.pl
1491 endif #ifeq ($(config-targets),1)
1492 endif #ifeq ($(mixed-targets),1)
1494 PHONY += checkstack kernelrelease kernelversion
1496 # UML needs a little special treatment here. It wants to use the host
1497 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1498 # else wants $(ARCH), including people doing cross-builds, which means
1499 # that $(SUBARCH) doesn't work here.
1500 ifeq ($(ARCH), um)
1501 CHECKSTACK_ARCH := $(SUBARCH)
1502 else
1503 CHECKSTACK_ARCH := $(ARCH)
1504 endif
1505 checkstack:
1506 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1507 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1509 kernelrelease:
1510 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1511 $(error kernelrelease not valid - run 'make prepare' to update it))
1512 kernelversion:
1513 @echo $(KERNELVERSION)
1515 # Single targets
1516 # ---------------------------------------------------------------------------
1517 # Single targets are compatible with:
1518 # - build with mixed source and output
1519 # - build with separate output dir 'make O=...'
1520 # - external modules
1522 # target-dir => where to store outputfile
1523 # build-dir => directory in kernel source tree to use
1525 ifeq ($(KBUILD_EXTMOD),)
1526 build-dir = $(patsubst %/,%,$(dir $@))
1527 target-dir = $(dir $@)
1528 else
1529 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1530 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1531 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1532 endif
1534 %.s: %.c prepare scripts FORCE
1535 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1536 %.i: %.c prepare scripts FORCE
1537 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1538 %.o: %.c prepare scripts FORCE
1539 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1540 %.lst: %.c prepare scripts FORCE
1541 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1542 %.s: %.S prepare scripts FORCE
1543 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1544 %.o: %.S prepare scripts FORCE
1545 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1546 %.symtypes: %.c prepare scripts FORCE
1547 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1549 # Modules
1550 / %/: prepare scripts FORCE
1551 $(cmd_crmodverdir)
1552 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1553 $(build)=$(build-dir)
1554 %.ko: prepare scripts FORCE
1555 $(cmd_crmodverdir)
1556 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1557 $(build)=$(build-dir) $(@:.ko=.o)
1558 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1560 # FIXME Should go into a make.lib or something
1561 # ===========================================================================
1563 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1564 cmd_rmdirs = rm -rf $(rm-dirs)
1566 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1567 cmd_rmfiles = rm -f $(rm-files)
1569 # Run depmod only if we have System.map and depmod is executable
1570 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1571 cmd_depmod = \
1572 if [ -r System.map -a -x $(DEPMOD) ]; then \
1573 $(DEPMOD) -ae -F System.map \
1574 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r) \
1575 $(KERNELRELEASE); \
1578 # Create temporary dir for module support files
1579 # clean it up only when building all modules
1580 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1581 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1583 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1584 $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1585 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1587 quiet_cmd_as_o_S = AS $@
1588 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1590 # read all saved command lines
1592 targets := $(wildcard $(sort $(targets)))
1593 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1595 ifneq ($(cmd_files),)
1596 $(cmd_files): ; # Do not try to update included dependency files
1597 include $(cmd_files)
1598 endif
1600 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1601 # Usage:
1602 # $(Q)$(MAKE) $(clean)=dir
1603 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1605 endif # skip-makefile
1607 PHONY += FORCE
1608 FORCE:
1610 # Declare the contents of the .PHONY variable as phony. We keep that
1611 # information in a variable se we can use it in if_changed and friends.
1612 .PHONY: $(PHONY)