ptrace: wait_task_zombie: s/->parent/->real_parent/
[linux-2.6/mini2440.git] / Makefile
blobea63667617f3543220eb4ffae6c915cfeb6aea3f
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 30
4 EXTRAVERSION =
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 TOPDIR := $(srctree)
144 # FIXME - TOPDIR is obsolete, use srctree/objtree
145 objtree := $(CURDIR)
146 src := $(srctree)
147 obj := $(objtree)
149 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
151 export srctree objtree VPATH TOPDIR
154 # SUBARCH tells the usermode build what the underlying arch is. That is set
155 # first, and if a usermode build is happening, the "ARCH=um" on the command
156 # line overrides the setting of ARCH below. If a native build is happening,
157 # then ARCH is assigned, getting whatever value it gets normally, and
158 # SUBARCH is subsequently ignored.
160 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
161 -e s/arm.*/arm/ -e s/sa110/arm/ \
162 -e s/s390x/s390/ -e s/parisc64/parisc/ \
163 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
164 -e s/sh[234].*/sh/ )
166 # Cross compiling and selecting different set of gcc/bin-utils
167 # ---------------------------------------------------------------------------
169 # When performing cross compilation for other architectures ARCH shall be set
170 # to the target architecture. (See arch/* for the possibilities).
171 # ARCH can be set during invocation of make:
172 # make ARCH=ia64
173 # Another way is to have ARCH set in the environment.
174 # The default ARCH is the host where make is executed.
176 # CROSS_COMPILE specify the prefix used for all executables used
177 # during compilation. Only gcc and related bin-utils executables
178 # are prefixed with $(CROSS_COMPILE).
179 # CROSS_COMPILE can be set on the command line
180 # make CROSS_COMPILE=ia64-linux-
181 # Alternatively CROSS_COMPILE can be set in the environment.
182 # Default value for CROSS_COMPILE is not to prefix executables
183 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
184 export KBUILD_BUILDHOST := $(SUBARCH)
185 ARCH ?= $(SUBARCH)
186 CROSS_COMPILE ?=
188 # Architecture as present in compile.h
189 UTS_MACHINE := $(ARCH)
190 SRCARCH := $(ARCH)
192 # Additional ARCH settings for x86
193 ifeq ($(ARCH),i386)
194 SRCARCH := x86
195 endif
196 ifeq ($(ARCH),x86_64)
197 SRCARCH := x86
198 endif
200 # Additional ARCH settings for sparc
201 ifeq ($(ARCH),sparc64)
202 SRCARCH := sparc
203 endif
205 # Additional ARCH settings for sh
206 ifeq ($(ARCH),sh64)
207 SRCARCH := sh
208 endif
210 # Where to locate arch specific headers
211 hdr-arch := $(SRCARCH)
213 ifeq ($(ARCH),m68knommu)
214 hdr-arch := m68k
215 endif
217 KCONFIG_CONFIG ?= .config
219 # SHELL used by kbuild
220 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
221 else if [ -x /bin/bash ]; then echo /bin/bash; \
222 else echo sh; fi ; fi)
224 HOSTCC = gcc
225 HOSTCXX = g++
226 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
227 HOSTCXXFLAGS = -O2
229 # Decide whether to build built-in, modular, or both.
230 # Normally, just do built-in.
232 KBUILD_MODULES :=
233 KBUILD_BUILTIN := 1
235 # If we have only "make modules", don't compile built-in objects.
236 # When we're building modules with modversions, we need to consider
237 # the built-in objects during the descend as well, in order to
238 # make sure the checksums are up to date before we record them.
240 ifeq ($(MAKECMDGOALS),modules)
241 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
242 endif
244 # If we have "make <whatever> modules", compile modules
245 # in addition to whatever we do anyway.
246 # Just "make" or "make all" shall build modules as well
248 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
249 KBUILD_MODULES := 1
250 endif
252 ifeq ($(MAKECMDGOALS),)
253 KBUILD_MODULES := 1
254 endif
256 export KBUILD_MODULES KBUILD_BUILTIN
257 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
259 # Beautify output
260 # ---------------------------------------------------------------------------
262 # Normally, we echo the whole command before executing it. By making
263 # that echo $($(quiet)$(cmd)), we now have the possibility to set
264 # $(quiet) to choose other forms of output instead, e.g.
266 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
267 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
269 # If $(quiet) is empty, the whole command will be printed.
270 # If it is set to "quiet_", only the short version will be printed.
271 # If it is set to "silent_", nothing will be printed at all, since
272 # the variable $(silent_cmd_cc_o_c) doesn't exist.
274 # A simple variant is to prefix commands with $(Q) - that's useful
275 # for commands that shall be hidden in non-verbose mode.
277 # $(Q)ln $@ :<
279 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
280 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
282 ifeq ($(KBUILD_VERBOSE),1)
283 quiet =
285 else
286 quiet=quiet_
287 Q = @
288 endif
290 # If the user is running make -s (silent mode), suppress echoing of
291 # commands
293 ifneq ($(findstring s,$(MAKEFLAGS)),)
294 quiet=silent_
295 endif
297 export quiet Q KBUILD_VERBOSE
300 # Look for make include files relative to root of kernel src
301 MAKEFLAGS += --include-dir=$(srctree)
303 # We need some generic definitions (do not try to remake the file).
304 $(srctree)/scripts/Kbuild.include: ;
305 include $(srctree)/scripts/Kbuild.include
307 # Make variables (CC, etc...)
309 AS = $(CROSS_COMPILE)as
310 LD = $(CROSS_COMPILE)ld
311 CC = $(CROSS_COMPILE)gcc
312 CPP = $(CC) -E
313 AR = $(CROSS_COMPILE)ar
314 NM = $(CROSS_COMPILE)nm
315 STRIP = $(CROSS_COMPILE)strip
316 OBJCOPY = $(CROSS_COMPILE)objcopy
317 OBJDUMP = $(CROSS_COMPILE)objdump
318 AWK = awk
319 GENKSYMS = scripts/genksyms/genksyms
320 DEPMOD = /sbin/depmod
321 KALLSYMS = scripts/kallsyms
322 PERL = perl
323 CHECK = sparse
325 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
326 -Wbitwise -Wno-return-void $(CF)
327 MODFLAGS = -DMODULE
328 CFLAGS_MODULE = $(MODFLAGS)
329 AFLAGS_MODULE = $(MODFLAGS)
330 LDFLAGS_MODULE =
331 CFLAGS_KERNEL =
332 AFLAGS_KERNEL =
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 KBUILD_AFLAGS := -D__ASSEMBLY__
349 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
350 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
351 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
353 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
354 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
355 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
356 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
358 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
359 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
360 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
362 # When compiling out-of-tree modules, put MODVERDIR in the module
363 # tree rather than in the kernel tree. The kernel tree might
364 # even be read-only.
365 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
367 # Files to ignore in find ... statements
369 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
370 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
372 # ===========================================================================
373 # Rules shared between *config targets and build targets
375 # Basic helpers built in scripts/
376 PHONY += scripts_basic
377 scripts_basic:
378 $(Q)$(MAKE) $(build)=scripts/basic
380 # To avoid any implicit rule to kick in, define an empty command.
381 scripts/basic/%: scripts_basic ;
383 PHONY += outputmakefile
384 # outputmakefile generates a Makefile in the output directory, if using a
385 # separate output directory. This allows convenient use of make in the
386 # output directory.
387 outputmakefile:
388 ifneq ($(KBUILD_SRC),)
389 $(Q)ln -fsn $(srctree) source
390 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
391 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
392 endif
394 # To make sure we do not include .config for any of the *config targets
395 # catch them early, and hand them over to scripts/kconfig/Makefile
396 # It is allowed to specify more targets when calling make, including
397 # mixing *config targets and build targets.
398 # For example 'make oldconfig all'.
399 # Detect when mixed targets is specified, and make a second invocation
400 # of make so .config is not included in this case either (for *config).
402 no-dot-config-targets := clean mrproper distclean \
403 cscope TAGS tags help %docs check% \
404 include/linux/version.h headers_% \
405 kernelrelease kernelversion
407 config-targets := 0
408 mixed-targets := 0
409 dot-config := 1
411 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
412 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
413 dot-config := 0
414 endif
415 endif
417 ifeq ($(KBUILD_EXTMOD),)
418 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
419 config-targets := 1
420 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
421 mixed-targets := 1
422 endif
423 endif
424 endif
426 ifeq ($(mixed-targets),1)
427 # ===========================================================================
428 # We're called with mixed targets (*config and build targets).
429 # Handle them one by one.
431 %:: FORCE
432 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
434 else
435 ifeq ($(config-targets),1)
436 # ===========================================================================
437 # *config targets only - make sure prerequisites are updated, and descend
438 # in scripts/kconfig to make the *config target
440 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
441 # KBUILD_DEFCONFIG may point out an alternative default configuration
442 # used for 'make defconfig'
443 include $(srctree)/arch/$(SRCARCH)/Makefile
444 export KBUILD_DEFCONFIG KBUILD_KCONFIG
446 config: scripts_basic outputmakefile FORCE
447 $(Q)mkdir -p include/linux include/config
448 $(Q)$(MAKE) $(build)=scripts/kconfig $@
450 %config: scripts_basic outputmakefile FORCE
451 $(Q)mkdir -p include/linux include/config
452 $(Q)$(MAKE) $(build)=scripts/kconfig $@
454 else
455 # ===========================================================================
456 # Build targets only - this includes vmlinux, arch specific targets, clean
457 # targets and others. In general all targets except *config targets.
459 ifeq ($(KBUILD_EXTMOD),)
460 # Additional helpers built in scripts/
461 # Carefully list dependencies so we do not try to build scripts twice
462 # in parallel
463 PHONY += scripts
464 scripts: scripts_basic include/config/auto.conf
465 $(Q)$(MAKE) $(build)=$(@)
467 # Objects we will link into vmlinux / subdirs we need to visit
468 init-y := init/
469 drivers-y := drivers/ sound/ firmware/
470 net-y := net/
471 libs-y := lib/
472 core-y := usr/
473 endif # KBUILD_EXTMOD
475 ifeq ($(dot-config),1)
476 # Read in config
477 -include include/config/auto.conf
479 ifeq ($(KBUILD_EXTMOD),)
480 # Read in dependencies to all Kconfig* files, make sure to run
481 # oldconfig if changes are detected.
482 -include include/config/auto.conf.cmd
484 # To avoid any implicit rule to kick in, define an empty command
485 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
487 # If .config is newer than include/config/auto.conf, someone tinkered
488 # with it and forgot to run make oldconfig.
489 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
490 # we execute the config step to be sure to catch updated Kconfig files
491 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
492 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
493 else
494 # external modules needs include/linux/autoconf.h and include/config/auto.conf
495 # but do not care if they are up-to-date. Use auto.conf to trigger the test
496 PHONY += include/config/auto.conf
498 include/config/auto.conf:
499 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
500 echo; \
501 echo " ERROR: Kernel configuration is invalid."; \
502 echo " include/linux/autoconf.h or $@ are missing."; \
503 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
504 echo; \
505 /bin/false)
507 endif # KBUILD_EXTMOD
509 else
510 # Dummy target needed, because used as prerequisite
511 include/config/auto.conf: ;
512 endif # $(dot-config)
514 # The all: target is the default when no target is given on the
515 # command line.
516 # This allow a user to issue only 'make' to build a kernel including modules
517 # Defaults vmlinux but it is usually overridden in the arch makefile
518 all: vmlinux
520 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
521 KBUILD_CFLAGS += -Os
522 else
523 KBUILD_CFLAGS += -O2
524 endif
526 include $(srctree)/arch/$(SRCARCH)/Makefile
528 ifneq ($(CONFIG_FRAME_WARN),0)
529 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
530 endif
532 # Force gcc to behave correct even for buggy distributions
533 ifndef CONFIG_CC_STACKPROTECTOR
534 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
535 endif
537 ifdef CONFIG_FRAME_POINTER
538 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
539 else
540 KBUILD_CFLAGS += -fomit-frame-pointer
541 endif
543 ifdef CONFIG_DEBUG_INFO
544 KBUILD_CFLAGS += -g
545 KBUILD_AFLAGS += -gdwarf-2
546 endif
548 ifdef CONFIG_FUNCTION_TRACER
549 KBUILD_CFLAGS += -pg
550 endif
552 # We trigger additional mismatches with less inlining
553 ifdef CONFIG_DEBUG_SECTION_MISMATCH
554 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
555 endif
557 # arch Makefile may override CC so keep this after arch Makefile is included
558 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
559 CHECKFLAGS += $(NOSTDINC_FLAGS)
561 # warn about C99 declaration after statement
562 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
564 # disable pointer signed / unsigned warnings in gcc 4.0
565 KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
567 # disable invalid "can't wrap" optimizations for signed / pointers
568 KBUILD_CFLAGS += $(call cc-option,-fwrapv)
570 # revert to pre-gcc-4.4 behaviour of .eh_frame
571 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
573 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
574 # But warn user when we do so
575 warn-assign = \
576 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
578 ifneq ($(KCPPFLAGS),)
579 $(call warn-assign,CPPFLAGS)
580 KBUILD_CPPFLAGS += $(KCPPFLAGS)
581 endif
582 ifneq ($(KAFLAGS),)
583 $(call warn-assign,AFLAGS)
584 KBUILD_AFLAGS += $(KAFLAGS)
585 endif
586 ifneq ($(KCFLAGS),)
587 $(call warn-assign,CFLAGS)
588 KBUILD_CFLAGS += $(KCFLAGS)
589 endif
591 # Use --build-id when available.
592 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
593 $(call ld-option, -Wl$(comma)--build-id,))
594 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
595 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
597 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
598 LDFLAGS_vmlinux += -X
599 endif
601 # Default kernel image to build when no specific target is given.
602 # KBUILD_IMAGE may be overruled on the command line or
603 # set in the environment
604 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
605 # this default value
606 export KBUILD_IMAGE ?= vmlinux
609 # INSTALL_PATH specifies where to place the updated kernel and system map
610 # images. Default is /boot, but you can set it to other values
611 export INSTALL_PATH ?= /boot
614 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
615 # relocations required by build roots. This is not defined in the
616 # makefile but the argument can be passed to make if needed.
619 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
620 export MODLIB
623 # INSTALL_MOD_STRIP, if defined, will cause modules to be
624 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
625 # the default option --strip-debug will be used. Otherwise,
626 # INSTALL_MOD_STRIP will used as the options to the strip command.
628 ifdef INSTALL_MOD_STRIP
629 ifeq ($(INSTALL_MOD_STRIP),1)
630 mod_strip_cmd = $(STRIP) --strip-debug
631 else
632 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
633 endif # INSTALL_MOD_STRIP=1
634 else
635 mod_strip_cmd = true
636 endif # INSTALL_MOD_STRIP
637 export mod_strip_cmd
640 ifeq ($(KBUILD_EXTMOD),)
641 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
643 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
644 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
645 $(net-y) $(net-m) $(libs-y) $(libs-m)))
647 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
648 $(init-n) $(init-) \
649 $(core-n) $(core-) $(drivers-n) $(drivers-) \
650 $(net-n) $(net-) $(libs-n) $(libs-))))
652 init-y := $(patsubst %/, %/built-in.o, $(init-y))
653 core-y := $(patsubst %/, %/built-in.o, $(core-y))
654 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
655 net-y := $(patsubst %/, %/built-in.o, $(net-y))
656 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
657 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
658 libs-y := $(libs-y1) $(libs-y2)
660 # Build vmlinux
661 # ---------------------------------------------------------------------------
662 # vmlinux is built from the objects selected by $(vmlinux-init) and
663 # $(vmlinux-main). Most are built-in.o files from top-level directories
664 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
665 # Ordering when linking is important, and $(vmlinux-init) must be first.
667 # vmlinux
670 # +-< $(vmlinux-init)
671 # | +--< init/version.o + more
673 # +--< $(vmlinux-main)
674 # | +--< driver/built-in.o mm/built-in.o + more
676 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
678 # vmlinux version (uname -v) cannot be updated during normal
679 # descending-into-subdirs phase since we do not yet know if we need to
680 # update vmlinux.
681 # Therefore this step is delayed until just before final link of vmlinux -
682 # except in the kallsyms case where it is done just before adding the
683 # symbols to the kernel.
685 # System.map is generated to document addresses of all kernel symbols
687 vmlinux-init := $(head-y) $(init-y)
688 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
689 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
690 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
691 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
693 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
694 # May be overridden by arch/$(ARCH)/Makefile
695 quiet_cmd_vmlinux__ ?= LD $@
696 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
697 -T $(vmlinux-lds) $(vmlinux-init) \
698 --start-group $(vmlinux-main) --end-group \
699 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
701 # Generate new vmlinux version
702 quiet_cmd_vmlinux_version = GEN .version
703 cmd_vmlinux_version = set -e; \
704 if [ ! -r .version ]; then \
705 rm -f .version; \
706 echo 1 >.version; \
707 else \
708 mv .version .old_version; \
709 expr 0$$(cat .old_version) + 1 >.version; \
710 fi; \
711 $(MAKE) $(build)=init
713 # Generate System.map
714 quiet_cmd_sysmap = SYSMAP
715 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
717 # Link of vmlinux
718 # If CONFIG_KALLSYMS is set .version is already updated
719 # Generate System.map and verify that the content is consistent
720 # Use + in front of the vmlinux_version rule to silent warning with make -j2
721 # First command is ':' to allow us to use + in front of the rule
722 define rule_vmlinux__
724 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
726 $(call cmd,vmlinux__)
727 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
729 $(Q)$(if $($(quiet)cmd_sysmap), \
730 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
731 $(cmd_sysmap) $@ System.map; \
732 if [ $$? -ne 0 ]; then \
733 rm -f $@; \
734 /bin/false; \
736 $(verify_kallsyms)
737 endef
740 ifdef CONFIG_KALLSYMS
741 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
742 # It's a three stage process:
743 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
744 # empty
745 # Running kallsyms on that gives us .tmp_kallsyms1.o with
746 # the right size - vmlinux version (uname -v) is updated during this step
747 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
748 # but due to the added section, some addresses have shifted.
749 # From here, we generate a correct .tmp_kallsyms2.o
750 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
751 # o Verify that the System.map from vmlinux matches the map from
752 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
753 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
754 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
755 # temporary bypass to allow the kernel to be built while the
756 # maintainers work out what went wrong with kallsyms.
758 ifdef CONFIG_KALLSYMS_EXTRA_PASS
759 last_kallsyms := 3
760 else
761 last_kallsyms := 2
762 endif
764 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
766 define verify_kallsyms
767 $(Q)$(if $($(quiet)cmd_sysmap), \
768 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
769 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
770 $(Q)cmp -s System.map .tmp_System.map || \
771 (echo Inconsistent kallsyms data; \
772 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
773 rm .tmp_kallsyms* ; /bin/false )
774 endef
776 # Update vmlinux version before link
777 # Use + in front of this rule to silent warning about make -j1
778 # First command is ':' to allow us to use + in front of this rule
779 cmd_ksym_ld = $(cmd_vmlinux__)
780 define rule_ksym_ld
782 +$(call cmd,vmlinux_version)
783 $(call cmd,vmlinux__)
784 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
785 endef
787 # Generate .S file with all kernel symbols
788 quiet_cmd_kallsyms = KSYM $@
789 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
790 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
792 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
793 $(call if_changed_dep,as_o_S)
795 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
796 $(call cmd,kallsyms)
798 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
799 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
800 $(call if_changed_rule,ksym_ld)
802 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
803 $(call if_changed,vmlinux__)
805 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
806 $(call if_changed,vmlinux__)
808 # Needs to visit scripts/ before $(KALLSYMS) can be used.
809 $(KALLSYMS): scripts ;
811 # Generate some data for debugging strange kallsyms problems
812 debug_kallsyms: .tmp_map$(last_kallsyms)
814 .tmp_map%: .tmp_vmlinux% FORCE
815 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
817 .tmp_map3: .tmp_map2
819 .tmp_map2: .tmp_map1
821 endif # ifdef CONFIG_KALLSYMS
823 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
824 # relevant sections renamed as per the linker script.
825 quiet_cmd_vmlinux-modpost = LD $@
826 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
827 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
828 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
829 define rule_vmlinux-modpost
831 +$(call cmd,vmlinux-modpost)
832 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
833 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
834 endef
836 # vmlinux image - including updated kernel symbols
837 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
838 ifdef CONFIG_HEADERS_CHECK
839 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
840 endif
841 ifdef CONFIG_SAMPLES
842 $(Q)$(MAKE) $(build)=samples
843 endif
844 ifdef CONFIG_BUILD_DOCSRC
845 $(Q)$(MAKE) $(build)=Documentation
846 endif
847 $(call vmlinux-modpost)
848 $(call if_changed_rule,vmlinux__)
849 $(Q)rm -f .old_version
851 # build vmlinux.o first to catch section mismatch errors early
852 ifdef CONFIG_KALLSYMS
853 .tmp_vmlinux1: vmlinux.o
854 endif
856 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
857 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
858 $(call if_changed_rule,vmlinux-modpost)
860 # The actual objects are generated when descending,
861 # make sure no implicit rule kicks in
862 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
864 # Handle descending into subdirectories listed in $(vmlinux-dirs)
865 # Preset locale variables to speed up the build process. Limit locale
866 # tweaks to this spot to avoid wrong language settings when running
867 # make menuconfig etc.
868 # Error messages still appears in the original language
870 PHONY += $(vmlinux-dirs)
871 $(vmlinux-dirs): prepare scripts
872 $(Q)$(MAKE) $(build)=$@
874 # Build the kernel release string
876 # The KERNELRELEASE value built here is stored in the file
877 # include/config/kernel.release, and is used when executing several
878 # make targets, such as "make install" or "make modules_install."
880 # The eventual kernel release string consists of the following fields,
881 # shown in a hierarchical format to show how smaller parts are concatenated
882 # to form the larger and final value, with values coming from places like
883 # the Makefile, kernel config options, make command line options and/or
884 # SCM tag information.
886 # $(KERNELVERSION)
887 # $(VERSION) eg, 2
888 # $(PATCHLEVEL) eg, 6
889 # $(SUBLEVEL) eg, 18
890 # $(EXTRAVERSION) eg, -rc6
891 # $(localver-full)
892 # $(localver)
893 # localversion* (files without backups, containing '~')
894 # $(CONFIG_LOCALVERSION) (from kernel config setting)
895 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
896 # ./scripts/setlocalversion (SCM tag, if one exists)
897 # $(LOCALVERSION) (from make command line if provided)
899 # Note how the final $(localver-auto) string is included *only* if the
900 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
901 # moment, only git is supported but other SCMs can edit the script
902 # scripts/setlocalversion and add the appropriate checks as needed.
904 pattern = ".*/localversion[^~]*"
905 string = $(shell cat /dev/null \
906 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
908 localver = $(subst $(space),, $(string) \
909 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
911 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
912 # and if the SCM is know a tag from the SCM is appended.
913 # The appended tag is determined by the SCM used.
915 # .scmversion is used when generating rpm packages so we do not loose
916 # the version information from the SCM when we do the build of the kernel
917 # from the copied source
918 ifdef CONFIG_LOCALVERSION_AUTO
920 ifeq ($(wildcard .scmversion),)
921 _localver-auto = $(shell $(CONFIG_SHELL) \
922 $(srctree)/scripts/setlocalversion $(srctree))
923 else
924 _localver-auto = $(shell cat .scmversion 2> /dev/null)
925 endif
927 localver-auto = $(LOCALVERSION)$(_localver-auto)
928 endif
930 localver-full = $(localver)$(localver-auto)
932 # Store (new) KERNELRELASE string in include/config/kernel.release
933 kernelrelease = $(KERNELVERSION)$(localver-full)
934 include/config/kernel.release: include/config/auto.conf FORCE
935 $(Q)rm -f $@
936 $(Q)echo $(kernelrelease) > $@
939 # Things we need to do before we recursively start building the kernel
940 # or the modules are listed in "prepare".
941 # A multi level approach is used. prepareN is processed before prepareN-1.
942 # archprepare is used in arch Makefiles and when processed asm symlink,
943 # version.h and scripts_basic is processed / created.
945 # Listed in dependency order
946 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
948 # prepare3 is used to check if we are building in a separate output directory,
949 # and if so do:
950 # 1) Check that make has not been executed in the kernel src $(srctree)
951 # 2) Create the include2 directory, used for the second asm symlink
952 prepare3: include/config/kernel.release
953 ifneq ($(KBUILD_SRC),)
954 @$(kecho) ' Using $(srctree) as source for kernel'
955 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
956 echo " $(srctree) is not clean, please run 'make mrproper'";\
957 echo " in the '$(srctree)' directory.";\
958 /bin/false; \
960 $(Q)if [ ! -d include2 ]; then \
961 mkdir -p include2; \
962 ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm; \
964 endif
966 # prepare2 creates a makefile if using a separate output directory
967 prepare2: prepare3 outputmakefile
969 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
970 include/asm include/config/auto.conf
971 $(cmd_crmodverdir)
973 archprepare: prepare1 scripts_basic
975 prepare0: archprepare FORCE
976 $(Q)$(MAKE) $(build)=.
977 $(Q)$(MAKE) $(build)=. missing-syscalls
979 # All the preparing..
980 prepare: prepare0
982 # Leave this as default for preprocessing vmlinux.lds.S, which is now
983 # done in arch/$(ARCH)/kernel/Makefile
985 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
987 # The asm symlink changes when $(ARCH) changes.
988 # Detect this and ask user to run make mrproper
989 # If asm is a stale symlink (point to dir that does not exist) remove it
990 define check-symlink
991 set -e; \
992 if [ -L include/asm ]; then \
993 asmlink=`readlink include/asm | cut -d '-' -f 2`; \
994 if [ "$$asmlink" != "$(SRCARCH)" ]; then \
995 echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
996 echo " set ARCH or save .config and run 'make mrproper' to fix it"; \
997 exit 1; \
998 fi; \
999 test -e $$asmlink || rm include/asm; \
1000 elif [ -d include/asm ]; then \
1001 echo "ERROR: $@ is a directory but a symlink was expected";\
1002 exit 1; \
1004 endef
1006 # We create the target directory of the symlink if it does
1007 # not exist so the test in check-symlink works and we have a
1008 # directory for generated filesas used by some architectures.
1009 define create-symlink
1010 if [ ! -L include/asm ]; then \
1011 $(kecho) ' SYMLINK $@ -> include/asm-$(SRCARCH)'; \
1012 if [ ! -d include/asm-$(SRCARCH) ]; then \
1013 mkdir -p include/asm-$(SRCARCH); \
1014 fi; \
1015 ln -fsn asm-$(SRCARCH) $@; \
1017 endef
1019 include/asm: FORCE
1020 $(Q)$(check-symlink)
1021 $(Q)$(create-symlink)
1023 # Generate some files
1024 # ---------------------------------------------------------------------------
1026 # KERNELRELEASE can change from a few different places, meaning version.h
1027 # needs to be updated, so this check is forced on all builds
1029 uts_len := 64
1030 define filechk_utsrelease.h
1031 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1032 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1033 exit 1; \
1034 fi; \
1035 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1036 endef
1038 define filechk_version.h
1039 (echo \#define LINUX_VERSION_CODE $(shell \
1040 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1041 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1042 endef
1044 include/linux/version.h: $(srctree)/Makefile FORCE
1045 $(call filechk,version.h)
1047 include/linux/utsrelease.h: include/config/kernel.release FORCE
1048 $(call filechk,utsrelease.h)
1050 PHONY += headerdep
1051 headerdep:
1052 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1054 # ---------------------------------------------------------------------------
1056 PHONY += depend dep
1057 depend dep:
1058 @echo '*** Warning: make $@ is unnecessary now.'
1060 # ---------------------------------------------------------------------------
1061 # Firmware install
1062 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1063 export INSTALL_FW_PATH
1065 PHONY += firmware_install
1066 firmware_install: FORCE
1067 @mkdir -p $(objtree)/firmware
1068 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1070 # ---------------------------------------------------------------------------
1071 # Kernel headers
1073 #Default location for installed headers
1074 export INSTALL_HDR_PATH = $(objtree)/usr
1076 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1077 # Find out where the Kbuild file is located to support
1078 # arch/$(ARCH)/include/asm
1079 hdr-dir = $(strip \
1080 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1081 arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1083 # If we do an all arch process set dst to asm-$(hdr-arch)
1084 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1086 PHONY += __headers
1087 __headers: include/linux/version.h scripts_basic FORCE
1088 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1090 PHONY += headers_install_all
1091 headers_install_all:
1092 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1094 PHONY += headers_install
1095 headers_install: __headers
1096 $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1097 $(error Headers not exportable for the $(SRCARCH) architecture))
1098 $(Q)$(MAKE) $(hdr-inst)=include
1099 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1101 PHONY += headers_check_all
1102 headers_check_all: headers_install_all
1103 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1105 PHONY += headers_check
1106 headers_check: headers_install
1107 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1108 $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1110 # ---------------------------------------------------------------------------
1111 # Modules
1113 ifdef CONFIG_MODULES
1115 # By default, build modules as well
1117 all: modules
1119 # Build modules
1121 # A module can be listed more than once in obj-m resulting in
1122 # duplicate lines in modules.order files. Those are removed
1123 # using awk while concatenating to the final file.
1125 PHONY += modules
1126 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1127 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1128 @$(kecho) ' Building modules, stage 2.';
1129 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1130 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1133 # Target to prepare building external modules
1134 PHONY += modules_prepare
1135 modules_prepare: prepare scripts
1137 # Target to install modules
1138 PHONY += modules_install
1139 modules_install: _modinst_ _modinst_post
1141 PHONY += _modinst_
1142 _modinst_:
1143 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1144 echo "Warning: you may need to install module-init-tools"; \
1145 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1146 sleep 1; \
1148 @rm -rf $(MODLIB)/kernel
1149 @rm -f $(MODLIB)/source
1150 @mkdir -p $(MODLIB)/kernel
1151 @ln -s $(srctree) $(MODLIB)/source
1152 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1153 rm -f $(MODLIB)/build ; \
1154 ln -s $(objtree) $(MODLIB)/build ; \
1156 @cp -f $(objtree)/modules.order $(MODLIB)/
1157 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1159 # This depmod is only for convenience to give the initial
1160 # boot a modules.dep even before / is mounted read-write. However the
1161 # boot script depmod is the master version.
1162 PHONY += _modinst_post
1163 _modinst_post: _modinst_
1164 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1165 $(call cmd,depmod)
1167 else # CONFIG_MODULES
1169 # Modules not configured
1170 # ---------------------------------------------------------------------------
1172 modules modules_install: FORCE
1173 @echo
1174 @echo "The present kernel configuration has modules disabled."
1175 @echo "Type 'make config' and enable loadable module support."
1176 @echo "Then build a kernel with module support enabled."
1177 @echo
1178 @exit 1
1180 endif # CONFIG_MODULES
1183 # Cleaning is done on three levels.
1184 # make clean Delete most generated files
1185 # Leave enough to build external modules
1186 # make mrproper Delete the current configuration, and all generated files
1187 # make distclean Remove editor backup files, patch leftover files and the like
1189 # Directories & files removed with 'make clean'
1190 CLEAN_DIRS += $(MODVERDIR)
1191 CLEAN_FILES += vmlinux System.map \
1192 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1194 # Directories & files removed with 'make mrproper'
1195 MRPROPER_DIRS += include/config include2 usr/include include/generated
1196 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1197 include/linux/autoconf.h include/linux/version.h \
1198 include/linux/utsrelease.h \
1199 include/linux/bounds.h include/asm*/asm-offsets.h \
1200 Module.symvers Module.markers tags TAGS cscope*
1202 # clean - Delete most, but leave enough to build external modules
1204 clean: rm-dirs := $(CLEAN_DIRS)
1205 clean: rm-files := $(CLEAN_FILES)
1206 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1208 PHONY += $(clean-dirs) clean archclean
1209 $(clean-dirs):
1210 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1212 clean: archclean $(clean-dirs)
1213 $(call cmd,rmdirs)
1214 $(call cmd,rmfiles)
1215 @find . $(RCS_FIND_IGNORE) \
1216 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1217 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1218 -o -name '*.symtypes' -o -name 'modules.order' \
1219 -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1220 -type f -print | xargs rm -f
1222 # mrproper - Delete all generated files, including .config
1224 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1225 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1226 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1228 PHONY += $(mrproper-dirs) mrproper archmrproper
1229 $(mrproper-dirs):
1230 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1232 mrproper: clean archmrproper $(mrproper-dirs)
1233 $(call cmd,rmdirs)
1234 $(call cmd,rmfiles)
1236 # distclean
1238 PHONY += distclean
1240 distclean: mrproper
1241 @find $(srctree) $(RCS_FIND_IGNORE) \
1242 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1243 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1244 -o -name '.*.rej' -o -size 0 \
1245 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1246 -type f -print | xargs rm -f
1249 # Packaging of the kernel to various formats
1250 # ---------------------------------------------------------------------------
1251 # rpm target kept for backward compatibility
1252 package-dir := $(srctree)/scripts/package
1254 %pkg: include/config/kernel.release FORCE
1255 $(Q)$(MAKE) $(build)=$(package-dir) $@
1256 rpm: include/config/kernel.release FORCE
1257 $(Q)$(MAKE) $(build)=$(package-dir) $@
1260 # Brief documentation of the typical targets used
1261 # ---------------------------------------------------------------------------
1263 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1264 boards := $(notdir $(boards))
1265 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1266 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1268 help:
1269 @echo 'Cleaning targets:'
1270 @echo ' clean - Remove most generated files but keep the config and'
1271 @echo ' enough build support to build external modules'
1272 @echo ' mrproper - Remove all generated files + config + various backup files'
1273 @echo ' distclean - mrproper + remove editor backup and patch files'
1274 @echo ''
1275 @echo 'Configuration targets:'
1276 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1277 @echo ''
1278 @echo 'Other generic targets:'
1279 @echo ' all - Build all targets marked with [*]'
1280 @echo '* vmlinux - Build the bare kernel'
1281 @echo '* modules - Build all modules'
1282 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1283 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1284 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1285 @echo ' dir/ - Build all files in dir and below'
1286 @echo ' dir/file.[ois] - Build specified target only'
1287 @echo ' dir/file.ko - Build module including final link'
1288 @echo ' modules_prepare - Set up for building external modules'
1289 @echo ' tags/TAGS - Generate tags file for editors'
1290 @echo ' cscope - Generate cscope index'
1291 @echo ' kernelrelease - Output the release version string'
1292 @echo ' kernelversion - Output the version stored in Makefile'
1293 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1294 echo ' (default: $(INSTALL_HDR_PATH))'; \
1295 echo ''
1296 @echo 'Static analysers'
1297 @echo ' checkstack - Generate a list of stack hogs'
1298 @echo ' namespacecheck - Name space analysis on compiled kernel'
1299 @echo ' versioncheck - Sanity check on version.h usage'
1300 @echo ' includecheck - Check for duplicate included header files'
1301 @echo ' export_report - List the usages of all exported symbols'
1302 @echo ' headers_check - Sanity check on exported headers'
1303 @echo ' headerdep - Detect inclusion cycles in headers'; \
1304 echo ''
1305 @echo 'Kernel packaging:'
1306 @$(MAKE) $(build)=$(package-dir) help
1307 @echo ''
1308 @echo 'Documentation targets:'
1309 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1310 @echo ''
1311 @echo 'Architecture specific targets ($(SRCARCH)):'
1312 @$(if $(archhelp),$(archhelp),\
1313 echo ' No architecture specific help defined for $(SRCARCH)')
1314 @echo ''
1315 @$(if $(boards), \
1316 $(foreach b, $(boards), \
1317 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1318 echo '')
1319 @$(if $(board-dirs), \
1320 $(foreach b, $(board-dirs), \
1321 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1322 printf " %-16s - Show all of the above\\n" help-boards; \
1323 echo '')
1325 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1326 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1327 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1328 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1329 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1330 @echo ''
1331 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1332 @echo 'For further info see the ./README file'
1335 help-board-dirs := $(addprefix help-,$(board-dirs))
1337 help-boards: $(help-board-dirs)
1339 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1341 $(help-board-dirs): help-%:
1342 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1343 @$(if $(boards-per-dir), \
1344 $(foreach b, $(boards-per-dir), \
1345 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1346 echo '')
1349 # Documentation targets
1350 # ---------------------------------------------------------------------------
1351 %docs: scripts_basic FORCE
1352 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1354 else # KBUILD_EXTMOD
1357 # External module support.
1358 # When building external modules the kernel used as basis is considered
1359 # read-only, and no consistency checks are made and the make
1360 # system is not used on the basis kernel. If updates are required
1361 # in the basis kernel ordinary make commands (without M=...) must
1362 # be used.
1364 # The following are the only valid targets when building external
1365 # modules.
1366 # make M=dir clean Delete all automatically generated files
1367 # make M=dir modules Make all modules in specified dir
1368 # make M=dir Same as 'make M=dir modules'
1369 # make M=dir modules_install
1370 # Install the modules built in the module directory
1371 # Assumes install directory is already created
1373 # We are always building modules
1374 KBUILD_MODULES := 1
1375 PHONY += crmodverdir
1376 crmodverdir:
1377 $(cmd_crmodverdir)
1379 PHONY += $(objtree)/Module.symvers
1380 $(objtree)/Module.symvers:
1381 @test -e $(objtree)/Module.symvers || ( \
1382 echo; \
1383 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1384 echo " is missing; modules will have no dependencies and modversions."; \
1385 echo )
1387 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1388 PHONY += $(module-dirs) modules
1389 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1390 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1392 modules: $(module-dirs)
1393 @$(kecho) ' Building modules, stage 2.';
1394 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1396 PHONY += modules_install
1397 modules_install: _emodinst_ _emodinst_post
1399 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1400 PHONY += _emodinst_
1401 _emodinst_:
1402 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1403 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1405 PHONY += _emodinst_post
1406 _emodinst_post: _emodinst_
1407 $(call cmd,depmod)
1409 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1411 PHONY += $(clean-dirs) clean
1412 $(clean-dirs):
1413 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1415 clean: rm-dirs := $(MODVERDIR)
1416 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1417 $(KBUILD_EXTMOD)/Module.markers \
1418 $(KBUILD_EXTMOD)/modules.order
1419 clean: $(clean-dirs)
1420 $(call cmd,rmdirs)
1421 $(call cmd,rmfiles)
1422 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1423 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1424 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1425 -type f -print | xargs rm -f
1427 help:
1428 @echo ' Building external modules.'
1429 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1430 @echo ''
1431 @echo ' modules - default target, build the module(s)'
1432 @echo ' modules_install - install the module'
1433 @echo ' clean - remove generated files in module directory only'
1434 @echo ''
1436 # Dummies...
1437 PHONY += prepare scripts
1438 prepare: ;
1439 scripts: ;
1440 endif # KBUILD_EXTMOD
1442 # Generate tags for editors
1443 # ---------------------------------------------------------------------------
1444 quiet_cmd_tags = GEN $@
1445 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1447 tags TAGS cscope: FORCE
1448 $(call cmd,tags)
1450 # Scripts to check various things for consistency
1451 # ---------------------------------------------------------------------------
1453 includecheck:
1454 find * $(RCS_FIND_IGNORE) \
1455 -name '*.[hcS]' -type f -print | sort \
1456 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1458 versioncheck:
1459 find * $(RCS_FIND_IGNORE) \
1460 -name '*.[hcS]' -type f -print | sort \
1461 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1463 namespacecheck:
1464 $(PERL) $(srctree)/scripts/namespace.pl
1466 export_report:
1467 $(PERL) $(srctree)/scripts/export_report.pl
1469 endif #ifeq ($(config-targets),1)
1470 endif #ifeq ($(mixed-targets),1)
1472 PHONY += checkstack kernelrelease kernelversion
1474 # UML needs a little special treatment here. It wants to use the host
1475 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1476 # else wants $(ARCH), including people doing cross-builds, which means
1477 # that $(SUBARCH) doesn't work here.
1478 ifeq ($(ARCH), um)
1479 CHECKSTACK_ARCH := $(SUBARCH)
1480 else
1481 CHECKSTACK_ARCH := $(ARCH)
1482 endif
1483 checkstack:
1484 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1485 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1487 kernelrelease:
1488 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1489 $(error kernelrelease not valid - run 'make prepare' to update it))
1490 kernelversion:
1491 @echo $(KERNELVERSION)
1493 # Single targets
1494 # ---------------------------------------------------------------------------
1495 # Single targets are compatible with:
1496 # - build with mixed source and output
1497 # - build with separate output dir 'make O=...'
1498 # - external modules
1500 # target-dir => where to store outputfile
1501 # build-dir => directory in kernel source tree to use
1503 ifeq ($(KBUILD_EXTMOD),)
1504 build-dir = $(patsubst %/,%,$(dir $@))
1505 target-dir = $(dir $@)
1506 else
1507 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1508 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1509 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1510 endif
1512 %.s: %.c prepare scripts FORCE
1513 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1514 %.i: %.c prepare scripts FORCE
1515 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1516 %.o: %.c prepare scripts FORCE
1517 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1518 %.lst: %.c prepare scripts FORCE
1519 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1520 %.s: %.S prepare scripts FORCE
1521 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1522 %.o: %.S prepare scripts FORCE
1523 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1524 %.symtypes: %.c prepare scripts FORCE
1525 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1527 # Modules
1528 /: prepare scripts FORCE
1529 $(cmd_crmodverdir)
1530 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1531 $(build)=$(build-dir)
1532 %/: prepare scripts FORCE
1533 $(cmd_crmodverdir)
1534 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1535 $(build)=$(build-dir)
1536 %.ko: prepare scripts FORCE
1537 $(cmd_crmodverdir)
1538 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1539 $(build)=$(build-dir) $(@:.ko=.o)
1540 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1542 # FIXME Should go into a make.lib or something
1543 # ===========================================================================
1545 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1546 cmd_rmdirs = rm -rf $(rm-dirs)
1548 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1549 cmd_rmfiles = rm -f $(rm-files)
1551 # Run depmod only if we have System.map and depmod is executable
1552 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1553 cmd_depmod = \
1554 if [ -r System.map -a -x $(DEPMOD) ]; then \
1555 $(DEPMOD) -ae -F System.map \
1556 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1557 $(KERNELRELEASE); \
1560 # Create temporary dir for module support files
1561 # clean it up only when building all modules
1562 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1563 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1565 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1566 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1567 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1569 quiet_cmd_as_o_S = AS $@
1570 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1572 # read all saved command lines
1574 targets := $(wildcard $(sort $(targets)))
1575 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1577 ifneq ($(cmd_files),)
1578 $(cmd_files): ; # Do not try to update included dependency files
1579 include $(cmd_files)
1580 endif
1582 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1583 # Usage:
1584 # $(Q)$(MAKE) $(clean)=dir
1585 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1587 endif # skip-makefile
1589 PHONY += FORCE
1590 FORCE:
1592 # Declare the contents of the .PHONY variable as phony. We keep that
1593 # information in a variable so we can use it in if_changed and friends.
1594 .PHONY: $(PHONY)