add untracked files and scripts/checkpatch.pl format
[linux-2.6.34.14-moxart.git] / Makefile
blob37a90519bcc84b90fa037770ffd603680be183fd
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 34
4 EXTRAVERSION = .14
5 NAME = Sheep on Meth
7 # *DOCUMENTATION*
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
13 # Do not:
14 # o use make's built-in rules and variables
15 # (this increases performance and avoids hard-to-debug behaviour);
16 # o print "Entering directory ...";
17 MAKEFLAGS += -rR --no-print-directory
19 # Avoid funny character set dependencies
20 unexport LC_ALL
21 LC_COLLATE=C
22 LC_NUMERIC=C
23 export LC_COLLATE LC_NUMERIC
25 # We are using a recursive build, so we need to do a little thinking
26 # to get the ordering right.
28 # Most importantly: sub-Makefiles should only ever modify files in
29 # their own directory. If in some directory we have a dependency on
30 # a file in another dir (which doesn't happen often, but it's often
31 # unavoidable when linking the built-in.o targets which finally
32 # turn into vmlinux), we will call a sub make in that other dir, and
33 # after that we are sure that everything which is in that other dir
34 # is now up to date.
36 # The only cases where we need to modify files which have global
37 # effects are thus separated out and done before the recursive
38 # descending is started. They are now explicitly listed as the
39 # prepare rule.
41 # To put more focus on warnings, be less verbose as default
42 # Use 'make V=1' to see the full commands
44 ifeq ("$(origin V)", "command line")
45 KBUILD_VERBOSE = $(V)
46 endif
47 ifndef KBUILD_VERBOSE
48 KBUILD_VERBOSE = 0
49 endif
51 # Call a source code checker (by default, "sparse") as part of the
52 # C compilation.
54 # Use 'make C=1' to enable checking of only re-compiled files.
55 # Use 'make C=2' to enable checking of *all* source files, regardless
56 # of whether they are re-compiled or not.
58 # See the file "Documentation/sparse.txt" for more details, including
59 # where to get the "sparse" utility.
61 ifeq ("$(origin C)", "command line")
62 KBUILD_CHECKSRC = $(C)
63 endif
64 ifndef KBUILD_CHECKSRC
65 KBUILD_CHECKSRC = 0
66 endif
68 # Use make M=dir to specify directory of external module to build
69 # Old syntax make ... SUBDIRS=$PWD is still supported
70 # Setting the environment variable KBUILD_EXTMOD take precedence
71 ifdef SUBDIRS
72 KBUILD_EXTMOD ?= $(SUBDIRS)
73 endif
75 ifeq ("$(origin M)", "command line")
76 KBUILD_EXTMOD := $(M)
77 endif
79 # kbuild supports saving output files in a separate directory.
80 # To locate output files in a separate directory two syntaxes are supported.
81 # In both cases the working directory must be the root of the kernel src.
82 # 1) O=
83 # Use "make O=dir/to/store/output/files/"
85 # 2) Set KBUILD_OUTPUT
86 # Set the environment variable KBUILD_OUTPUT to point to the directory
87 # where the output files shall be placed.
88 # export KBUILD_OUTPUT=dir/to/store/output/files/
89 # make
91 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
92 # variable.
95 # KBUILD_SRC is set on invocation of make in OBJ directory
96 # KBUILD_SRC is not intended to be used by the regular user (for now)
97 ifeq ($(KBUILD_SRC),)
99 # OK, Make called in directory where kernel src resides
100 # Do we want to locate output files in a separate directory?
101 ifeq ("$(origin O)", "command line")
102 KBUILD_OUTPUT := $(O)
103 endif
105 ifeq ("$(origin W)", "command line")
106 export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
107 endif
109 # That's our default target when none is given on the command line
110 PHONY := _all
111 _all:
113 # Cancel implicit rules on top Makefile
114 $(CURDIR)/Makefile Makefile: ;
116 ifneq ($(KBUILD_OUTPUT),)
117 # Invoke a second make in the output directory, passing relevant variables
118 # check that the output directory actually exists
119 saved-output := $(KBUILD_OUTPUT)
120 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
121 $(if $(KBUILD_OUTPUT),, \
122 $(error output directory "$(saved-output)" does not exist))
124 PHONY += $(MAKECMDGOALS) sub-make
126 $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
127 $(Q)@:
129 sub-make: FORCE
130 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
131 KBUILD_SRC=$(CURDIR) \
132 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
133 $(filter-out _all sub-make,$(MAKECMDGOALS))
135 # Leave processing to above invocation of make
136 skip-makefile := 1
137 endif # ifneq ($(KBUILD_OUTPUT),)
138 endif # ifeq ($(KBUILD_SRC),)
140 # We process the rest of the Makefile if this is the final invocation of make
141 ifeq ($(skip-makefile),)
143 # If building an external module we do not care about the all: rule
144 # but instead _all depend on modules
145 PHONY += all
146 ifeq ($(KBUILD_EXTMOD),)
147 _all: all
148 else
149 _all: modules
150 endif
152 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
153 objtree := $(CURDIR)
154 src := $(srctree)
155 obj := $(objtree)
157 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
159 export srctree objtree VPATH
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[234].*/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
192 export KBUILD_BUILDHOST := $(SUBARCH)
193 ARCH ?= $(SUBARCH)
194 CROSS_COMPILE ?=
196 # Architecture as present in compile.h
197 UTS_MACHINE := $(ARCH)
198 SRCARCH := $(ARCH)
200 # Additional ARCH settings for x86
201 ifeq ($(ARCH),i386)
202 SRCARCH := x86
203 endif
204 ifeq ($(ARCH),x86_64)
205 SRCARCH := x86
206 endif
208 # Additional ARCH settings for sparc
209 ifeq ($(ARCH),sparc64)
210 SRCARCH := sparc
211 endif
213 # Additional ARCH settings for sh
214 ifeq ($(ARCH),sh64)
215 SRCARCH := sh
216 endif
218 # Where to locate arch specific headers
219 hdr-arch := $(SRCARCH)
221 ifeq ($(ARCH),m68knommu)
222 hdr-arch := m68k
223 endif
225 KCONFIG_CONFIG ?= .config
227 # SHELL used by kbuild
228 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
229 else if [ -x /bin/bash ]; then echo /bin/bash; \
230 else echo sh; fi ; fi)
232 HOSTCC = gcc
233 HOSTCXX = g++
234 HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer
235 HOSTCXXFLAGS = -O2
237 # Decide whether to build built-in, modular, or both.
238 # Normally, just do built-in.
240 KBUILD_MODULES :=
241 KBUILD_BUILTIN := 1
243 # If we have only "make modules", don't compile built-in objects.
244 # When we're building modules with modversions, we need to consider
245 # the built-in objects during the descend as well, in order to
246 # make sure the checksums are up to date before we record them.
248 ifeq ($(MAKECMDGOALS),modules)
249 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
250 endif
252 # If we have "make <whatever> modules", compile modules
253 # in addition to whatever we do anyway.
254 # Just "make" or "make all" shall build modules as well
256 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
257 KBUILD_MODULES := 1
258 endif
260 ifeq ($(MAKECMDGOALS),)
261 KBUILD_MODULES := 1
262 endif
264 export KBUILD_MODULES KBUILD_BUILTIN
265 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
267 # Beautify output
268 # ---------------------------------------------------------------------------
270 # Normally, we echo the whole command before executing it. By making
271 # that echo $($(quiet)$(cmd)), we now have the possibility to set
272 # $(quiet) to choose other forms of output instead, e.g.
274 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
275 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
277 # If $(quiet) is empty, the whole command will be printed.
278 # If it is set to "quiet_", only the short version will be printed.
279 # If it is set to "silent_", nothing will be printed at all, since
280 # the variable $(silent_cmd_cc_o_c) doesn't exist.
282 # A simple variant is to prefix commands with $(Q) - that's useful
283 # for commands that shall be hidden in non-verbose mode.
285 # $(Q)ln $@ :<
287 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
288 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
290 ifeq ($(KBUILD_VERBOSE),1)
291 quiet =
293 else
294 quiet=quiet_
295 Q = @
296 endif
298 # If the user is running make -s (silent mode), suppress echoing of
299 # commands
301 ifneq ($(findstring s,$(MAKEFLAGS)),)
302 quiet=silent_
303 endif
305 export quiet Q KBUILD_VERBOSE
308 # Look for make include files relative to root of kernel src
309 MAKEFLAGS += --include-dir=$(srctree)
311 # We need some generic definitions (do not try to remake the file).
312 $(srctree)/scripts/Kbuild.include: ;
313 include $(srctree)/scripts/Kbuild.include
315 # Make variables (CC, etc...)
317 AS = $(CROSS_COMPILE)as
318 LD = $(CROSS_COMPILE)ld
319 CC = $(CROSS_COMPILE)gcc
320 CPP = $(CC) -E
321 AR = $(CROSS_COMPILE)ar
322 NM = $(CROSS_COMPILE)nm
323 STRIP = $(CROSS_COMPILE)strip
324 OBJCOPY = $(CROSS_COMPILE)objcopy
325 OBJDUMP = $(CROSS_COMPILE)objdump
326 AWK = awk
327 GENKSYMS = scripts/genksyms/genksyms
328 INSTALLKERNEL := installkernel
329 DEPMOD = /sbin/depmod
330 KALLSYMS = scripts/kallsyms
331 PERL = perl
332 CHECK = sparse
334 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
335 -Wbitwise -Wno-return-void $(CF)
336 MODFLAGS = -DMODULE
337 CFLAGS_MODULE = $(MODFLAGS)
338 AFLAGS_MODULE = $(MODFLAGS)
339 LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
340 CFLAGS_KERNEL =
341 AFLAGS_KERNEL =
342 CFLAGS_GCOV = -fprofile-arcs -ftest-coverage
345 # Use LINUXINCLUDE when you must reference the include/ directory.
346 # Needed to be compatible with the O= option
347 LINUXINCLUDE := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
348 $(if $(KBUILD_SRC), -I$(srctree)/include) \
349 -include include/generated/autoconf.h
351 KBUILD_CPPFLAGS := -D__KERNEL__
353 KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
354 -fno-strict-aliasing -fno-common \
355 -Werror-implicit-function-declaration \
356 -Wno-format-security \
357 -fno-delete-null-pointer-checks
358 KBUILD_AFLAGS := -D__ASSEMBLY__
360 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
361 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
362 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
364 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
365 export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
366 export CPP AR NM STRIP OBJCOPY OBJDUMP
367 export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
368 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
370 export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
371 export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
372 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
374 # When compiling out-of-tree modules, put MODVERDIR in the module
375 # tree rather than in the kernel tree. The kernel tree might
376 # even be read-only.
377 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
379 # Files to ignore in find ... statements
381 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
382 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
384 # ===========================================================================
385 # Rules shared between *config targets and build targets
387 # Basic helpers built in scripts/
388 PHONY += scripts_basic
389 scripts_basic:
390 $(Q)$(MAKE) $(build)=scripts/basic
391 $(Q)rm -f .tmp_quiet_recordmcount
393 # To avoid any implicit rule to kick in, define an empty command.
394 scripts/basic/%: scripts_basic ;
396 PHONY += outputmakefile
397 # outputmakefile generates a Makefile in the output directory, if using a
398 # separate output directory. This allows convenient use of make in the
399 # output directory.
400 outputmakefile:
401 ifneq ($(KBUILD_SRC),)
402 $(Q)ln -fsn $(srctree) source
403 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
404 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
405 endif
407 # To make sure we do not include .config for any of the *config targets
408 # catch them early, and hand them over to scripts/kconfig/Makefile
409 # It is allowed to specify more targets when calling make, including
410 # mixing *config targets and build targets.
411 # For example 'make oldconfig all'.
412 # Detect when mixed targets is specified, and make a second invocation
413 # of make so .config is not included in this case either (for *config).
415 no-dot-config-targets := clean mrproper distclean \
416 cscope TAGS tags help %docs check% \
417 include/linux/version.h headers_% \
418 kernelrelease kernelversion
420 config-targets := 0
421 mixed-targets := 0
422 dot-config := 1
424 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
425 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
426 dot-config := 0
427 endif
428 endif
430 ifeq ($(KBUILD_EXTMOD),)
431 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
432 config-targets := 1
433 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
434 mixed-targets := 1
435 endif
436 endif
437 endif
439 ifeq ($(mixed-targets),1)
440 # ===========================================================================
441 # We're called with mixed targets (*config and build targets).
442 # Handle them one by one.
444 %:: FORCE
445 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
447 else
448 ifeq ($(config-targets),1)
449 # ===========================================================================
450 # *config targets only - make sure prerequisites are updated, and descend
451 # in scripts/kconfig to make the *config target
453 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
454 # KBUILD_DEFCONFIG may point out an alternative default configuration
455 # used for 'make defconfig'
456 include $(srctree)/arch/$(SRCARCH)/Makefile
457 export KBUILD_DEFCONFIG KBUILD_KCONFIG
459 config: scripts_basic outputmakefile FORCE
460 $(Q)mkdir -p include/linux include/config
461 $(Q)$(MAKE) $(build)=scripts/kconfig $@
463 %config: scripts_basic outputmakefile FORCE
464 $(Q)mkdir -p include/linux include/config
465 $(Q)$(MAKE) $(build)=scripts/kconfig $@
467 else
468 # ===========================================================================
469 # Build targets only - this includes vmlinux, arch specific targets, clean
470 # targets and others. In general all targets except *config targets.
472 ifeq ($(KBUILD_EXTMOD),)
473 # Additional helpers built in scripts/
474 # Carefully list dependencies so we do not try to build scripts twice
475 # in parallel
476 PHONY += scripts
477 scripts: scripts_basic include/config/auto.conf include/config/tristate.conf
478 $(Q)$(MAKE) $(build)=$(@)
480 # Objects we will link into vmlinux / subdirs we need to visit
481 init-y := init/
482 drivers-y := drivers/ sound/ firmware/
483 net-y := net/
484 libs-y := lib/
485 core-y := usr/
486 endif # KBUILD_EXTMOD
488 ifeq ($(dot-config),1)
489 # Read in config
490 -include include/config/auto.conf
492 ifeq ($(KBUILD_EXTMOD),)
493 # Read in dependencies to all Kconfig* files, make sure to run
494 # oldconfig if changes are detected.
495 -include include/config/auto.conf.cmd
497 # To avoid any implicit rule to kick in, define an empty command
498 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
500 # If .config is newer than include/config/auto.conf, someone tinkered
501 # with it and forgot to run make oldconfig.
502 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
503 # we execute the config step to be sure to catch updated Kconfig files
504 include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
505 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
506 else
507 # external modules needs include/generated/autoconf.h and include/config/auto.conf
508 # but do not care if they are up-to-date. Use auto.conf to trigger the test
509 PHONY += include/config/auto.conf
511 include/config/auto.conf:
512 $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
513 echo; \
514 echo " ERROR: Kernel configuration is invalid."; \
515 echo " include/generated/autoconf.h or $@ are missing.";\
516 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
517 echo; \
518 /bin/false)
520 endif # KBUILD_EXTMOD
522 else
523 # Dummy target needed, because used as prerequisite
524 include/config/auto.conf: ;
525 endif # $(dot-config)
527 # The all: target is the default when no target is given on the
528 # command line.
529 # This allow a user to issue only 'make' to build a kernel including modules
530 # Defaults vmlinux but it is usually overridden in the arch makefile
531 all: vmlinux
533 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
534 KBUILD_CFLAGS += -Os
535 else
536 KBUILD_CFLAGS += -O2
537 endif
539 include $(srctree)/arch/$(SRCARCH)/Makefile
541 ifneq ($(CONFIG_FRAME_WARN),0)
542 KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
543 endif
545 # Force gcc to behave correct even for buggy distributions
546 ifndef CONFIG_CC_STACKPROTECTOR
547 KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
548 endif
550 # This warning generated too much noise in a regular build.
551 # Use make W=1 to enable this warning (see scripts/Makefile.build)
552 KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
554 ifdef CONFIG_FRAME_POINTER
555 KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
556 else
557 KBUILD_CFLAGS += -fomit-frame-pointer
558 endif
560 ifdef CONFIG_DEBUG_INFO
561 KBUILD_CFLAGS += -g
562 KBUILD_AFLAGS += -gdwarf-2
563 endif
565 ifdef CONFIG_FUNCTION_TRACER
566 KBUILD_CFLAGS += -pg
567 endif
569 # We trigger additional mismatches with less inlining
570 ifdef CONFIG_DEBUG_SECTION_MISMATCH
571 KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
572 endif
574 # arch Makefile may override CC so keep this after arch Makefile is included
575 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
576 CHECKFLAGS += $(NOSTDINC_FLAGS)
578 # warn about C99 declaration after statement
579 KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
581 # disable pointer signed / unsigned warnings in gcc 4.0
582 KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
584 # disable invalid "can't wrap" optimizations for signed / pointers
585 KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow)
587 # revert to pre-gcc-4.4 behaviour of .eh_frame
588 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
590 # conserve stack if available
591 KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
593 # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
594 # But warn user when we do so
595 warn-assign = \
596 $(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
598 ifneq ($(KCPPFLAGS),)
599 $(call warn-assign,CPPFLAGS)
600 KBUILD_CPPFLAGS += $(KCPPFLAGS)
601 endif
602 ifneq ($(KAFLAGS),)
603 $(call warn-assign,AFLAGS)
604 KBUILD_AFLAGS += $(KAFLAGS)
605 endif
606 ifneq ($(KCFLAGS),)
607 $(call warn-assign,CFLAGS)
608 KBUILD_CFLAGS += $(KCFLAGS)
609 endif
611 # Use --build-id when available.
612 LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
613 $(call cc-ldoption, -Wl$(comma)--build-id,))
614 LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
615 LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
617 ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
618 LDFLAGS_vmlinux += $(call ld-option, -X,)
619 endif
621 # Default kernel image to build when no specific target is given.
622 # KBUILD_IMAGE may be overruled on the command line or
623 # set in the environment
624 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
625 # this default value
626 export KBUILD_IMAGE ?= vmlinux
629 # INSTALL_PATH specifies where to place the updated kernel and system map
630 # images. Default is /boot, but you can set it to other values
631 export INSTALL_PATH ?= /boot
634 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
635 # relocations required by build roots. This is not defined in the
636 # makefile but the argument can be passed to make if needed.
639 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
640 export MODLIB
643 # INSTALL_MOD_STRIP, if defined, will cause modules to be
644 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
645 # the default option --strip-debug will be used. Otherwise,
646 # INSTALL_MOD_STRIP will used as the options to the strip command.
648 ifdef INSTALL_MOD_STRIP
649 ifeq ($(INSTALL_MOD_STRIP),1)
650 mod_strip_cmd = $(STRIP) --strip-debug
651 else
652 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
653 endif # INSTALL_MOD_STRIP=1
654 else
655 mod_strip_cmd = true
656 endif # INSTALL_MOD_STRIP
657 export mod_strip_cmd
660 ifeq ($(KBUILD_EXTMOD),)
661 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
663 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
664 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
665 $(net-y) $(net-m) $(libs-y) $(libs-m)))
667 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
668 $(init-n) $(init-) \
669 $(core-n) $(core-) $(drivers-n) $(drivers-) \
670 $(net-n) $(net-) $(libs-n) $(libs-))))
672 init-y := $(patsubst %/, %/built-in.o, $(init-y))
673 core-y := $(patsubst %/, %/built-in.o, $(core-y))
674 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
675 net-y := $(patsubst %/, %/built-in.o, $(net-y))
676 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
677 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
678 libs-y := $(libs-y1) $(libs-y2)
680 # Build vmlinux
681 # ---------------------------------------------------------------------------
682 # vmlinux is built from the objects selected by $(vmlinux-init) and
683 # $(vmlinux-main). Most are built-in.o files from top-level directories
684 # in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
685 # Ordering when linking is important, and $(vmlinux-init) must be first.
687 # vmlinux
690 # +-< $(vmlinux-init)
691 # | +--< init/version.o + more
693 # +--< $(vmlinux-main)
694 # | +--< driver/built-in.o mm/built-in.o + more
696 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
698 # vmlinux version (uname -v) cannot be updated during normal
699 # descending-into-subdirs phase since we do not yet know if we need to
700 # update vmlinux.
701 # Therefore this step is delayed until just before final link of vmlinux -
702 # except in the kallsyms case where it is done just before adding the
703 # symbols to the kernel.
705 # System.map is generated to document addresses of all kernel symbols
707 vmlinux-init := $(head-y) $(init-y)
708 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
709 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
710 vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds
711 export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
713 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
714 # May be overridden by arch/$(ARCH)/Makefile
715 quiet_cmd_vmlinux__ ?= LD $@
716 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
717 -T $(vmlinux-lds) $(vmlinux-init) \
718 --start-group $(vmlinux-main) --end-group \
719 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
721 # Generate new vmlinux version
722 quiet_cmd_vmlinux_version = GEN .version
723 cmd_vmlinux_version = set -e; \
724 if [ ! -r .version ]; then \
725 rm -f .version; \
726 echo 1 >.version; \
727 else \
728 mv .version .old_version; \
729 expr 0$$(cat .old_version) + 1 >.version; \
730 fi; \
731 $(MAKE) $(build)=init
733 # Generate System.map
734 quiet_cmd_sysmap = SYSMAP
735 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
737 # Link of vmlinux
738 # If CONFIG_KALLSYMS is set .version is already updated
739 # Generate System.map and verify that the content is consistent
740 # Use + in front of the vmlinux_version rule to silent warning with make -j2
741 # First command is ':' to allow us to use + in front of the rule
742 define rule_vmlinux__
744 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
746 $(call cmd,vmlinux__)
747 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
749 $(Q)$(if $($(quiet)cmd_sysmap), \
750 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
751 $(cmd_sysmap) $@ System.map; \
752 if [ $$? -ne 0 ]; then \
753 rm -f $@; \
754 /bin/false; \
756 $(verify_kallsyms)
757 endef
760 ifdef CONFIG_KALLSYMS
761 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
762 # It's a three stage process:
763 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
764 # empty
765 # Running kallsyms on that gives us .tmp_kallsyms1.o with
766 # the right size - vmlinux version (uname -v) is updated during this step
767 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
768 # but due to the added section, some addresses have shifted.
769 # From here, we generate a correct .tmp_kallsyms2.o
770 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
771 # o Verify that the System.map from vmlinux matches the map from
772 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
773 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
774 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
775 # temporary bypass to allow the kernel to be built while the
776 # maintainers work out what went wrong with kallsyms.
778 ifdef CONFIG_KALLSYMS_EXTRA_PASS
779 last_kallsyms := 3
780 else
781 last_kallsyms := 2
782 endif
784 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
786 define verify_kallsyms
787 $(Q)$(if $($(quiet)cmd_sysmap), \
788 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
789 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
790 $(Q)cmp -s System.map .tmp_System.map || \
791 (echo Inconsistent kallsyms data; \
792 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
793 rm .tmp_kallsyms* ; /bin/false )
794 endef
796 # Update vmlinux version before link
797 # Use + in front of this rule to silent warning about make -j1
798 # First command is ':' to allow us to use + in front of this rule
799 cmd_ksym_ld = $(cmd_vmlinux__)
800 define rule_ksym_ld
802 +$(call cmd,vmlinux_version)
803 $(call cmd,vmlinux__)
804 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
805 endef
807 # Generate .S file with all kernel symbols
808 quiet_cmd_kallsyms = KSYM $@
809 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
810 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
812 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
813 $(call if_changed_dep,as_o_S)
815 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
816 $(call cmd,kallsyms)
818 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
819 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
820 $(call if_changed_rule,ksym_ld)
822 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
823 $(call if_changed,vmlinux__)
825 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
826 $(call if_changed,vmlinux__)
828 # Needs to visit scripts/ before $(KALLSYMS) can be used.
829 $(KALLSYMS): scripts ;
831 # Generate some data for debugging strange kallsyms problems
832 debug_kallsyms: .tmp_map$(last_kallsyms)
834 .tmp_map%: .tmp_vmlinux% FORCE
835 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
837 .tmp_map3: .tmp_map2
839 .tmp_map2: .tmp_map1
841 endif # ifdef CONFIG_KALLSYMS
843 # Do modpost on a prelinked vmlinux. The finally linked vmlinux has
844 # relevant sections renamed as per the linker script.
845 quiet_cmd_vmlinux-modpost = LD $@
846 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \
847 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \
848 $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
849 define rule_vmlinux-modpost
851 +$(call cmd,vmlinux-modpost)
852 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
853 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
854 endef
856 # vmlinux image - including updated kernel symbols
857 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
858 ifdef CONFIG_HEADERS_CHECK
859 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
860 endif
861 ifdef CONFIG_SAMPLES
862 $(Q)$(MAKE) $(build)=samples
863 endif
864 ifdef CONFIG_BUILD_DOCSRC
865 $(Q)$(MAKE) $(build)=Documentation
866 endif
867 $(call vmlinux-modpost)
868 $(call if_changed_rule,vmlinux__)
869 $(Q)rm -f .old_version
871 # build vmlinux.o first to catch section mismatch errors early
872 ifdef CONFIG_KALLSYMS
873 .tmp_vmlinux1: vmlinux.o
874 endif
876 modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
877 vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
878 $(call if_changed_rule,vmlinux-modpost)
880 # The actual objects are generated when descending,
881 # make sure no implicit rule kicks in
882 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
884 # Handle descending into subdirectories listed in $(vmlinux-dirs)
885 # Preset locale variables to speed up the build process. Limit locale
886 # tweaks to this spot to avoid wrong language settings when running
887 # make menuconfig etc.
888 # Error messages still appears in the original language
890 PHONY += $(vmlinux-dirs)
891 $(vmlinux-dirs): prepare scripts
892 $(Q)$(MAKE) $(build)=$@
893 ifdef CONFIG_MODULES
894 $(Q)$(MAKE) $(modbuiltin)=$@
895 endif
897 # Build the kernel release string
899 # The KERNELRELEASE value built here is stored in the file
900 # include/config/kernel.release, and is used when executing several
901 # make targets, such as "make install" or "make modules_install."
903 # The eventual kernel release string consists of the following fields,
904 # shown in a hierarchical format to show how smaller parts are concatenated
905 # to form the larger and final value, with values coming from places like
906 # the Makefile, kernel config options, make command line options and/or
907 # SCM tag information.
909 # $(KERNELVERSION)
910 # $(VERSION) eg, 2
911 # $(PATCHLEVEL) eg, 6
912 # $(SUBLEVEL) eg, 18
913 # $(EXTRAVERSION) eg, -rc6
914 # $(localver-full)
915 # $(localver)
916 # localversion* (files without backups, containing '~')
917 # $(CONFIG_LOCALVERSION) (from kernel config setting)
918 # $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set)
919 # ./scripts/setlocalversion (SCM tag, if one exists)
920 # $(LOCALVERSION) (from make command line if provided)
922 # Note how the final $(localver-auto) string is included *only* if the
923 # kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the
924 # moment, only git is supported but other SCMs can edit the script
925 # scripts/setlocalversion and add the appropriate checks as needed.
927 pattern = ".*/localversion[^~]*"
928 string = $(shell cat /dev/null \
929 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
931 localver = $(subst $(space),, $(string) \
932 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
934 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
935 # and if the SCM is know a tag from the SCM is appended.
936 # The appended tag is determined by the SCM used.
938 # .scmversion is used when generating rpm packages so we do not loose
939 # the version information from the SCM when we do the build of the kernel
940 # from the copied source
941 ifdef CONFIG_LOCALVERSION_AUTO
943 ifeq ($(wildcard .scmversion),)
944 _localver-auto = $(shell $(CONFIG_SHELL) \
945 $(srctree)/scripts/setlocalversion $(srctree))
946 else
947 _localver-auto = $(shell cat .scmversion 2> /dev/null)
948 endif
950 localver-auto = $(LOCALVERSION)$(_localver-auto)
951 endif
953 localver-full = $(localver)$(localver-auto)
955 # Store (new) KERNELRELASE string in include/config/kernel.release
956 kernelrelease = $(KERNELVERSION)$(localver-full)
957 include/config/kernel.release: include/config/auto.conf FORCE
958 $(Q)rm -f $@
959 $(Q)echo $(kernelrelease) > $@
962 # Things we need to do before we recursively start building the kernel
963 # or the modules are listed in "prepare".
964 # A multi level approach is used. prepareN is processed before prepareN-1.
965 # archprepare is used in arch Makefiles and when processed asm symlink,
966 # version.h and scripts_basic is processed / created.
968 # Listed in dependency order
969 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
971 # prepare3 is used to check if we are building in a separate output directory,
972 # and if so do:
973 # 1) Check that make has not been executed in the kernel src $(srctree)
974 prepare3: include/config/kernel.release
975 ifneq ($(KBUILD_SRC),)
976 @$(kecho) ' Using $(srctree) as source for kernel'
977 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
978 echo " $(srctree) is not clean, please run 'make mrproper'";\
979 echo " in the '$(srctree)' directory.";\
980 /bin/false; \
982 endif
984 # prepare2 creates a makefile if using a separate output directory
985 prepare2: prepare3 outputmakefile
987 prepare1: prepare2 include/linux/version.h include/generated/utsrelease.h \
988 include/config/auto.conf
989 $(cmd_crmodverdir)
991 archprepare: prepare1 scripts_basic
993 prepare0: archprepare FORCE
994 $(Q)$(MAKE) $(build)=.
995 $(Q)$(MAKE) $(build)=. missing-syscalls
997 # All the preparing..
998 prepare: prepare0
1000 # Generate some files
1001 # ---------------------------------------------------------------------------
1003 # KERNELRELEASE can change from a few different places, meaning version.h
1004 # needs to be updated, so this check is forced on all builds
1006 uts_len := 64
1007 define filechk_utsrelease.h
1008 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1009 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
1010 exit 1; \
1011 fi; \
1012 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1013 endef
1015 define filechk_version.h
1016 (echo \#define LINUX_VERSION_CODE $(shell \
1017 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
1018 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1019 endef
1021 include/linux/version.h: $(srctree)/Makefile FORCE
1022 $(call filechk,version.h)
1024 include/generated/utsrelease.h: include/config/kernel.release FORCE
1025 $(call filechk,utsrelease.h)
1027 PHONY += headerdep
1028 headerdep:
1029 $(Q)find include/ -name '*.h' | xargs --max-args 1 scripts/headerdep.pl
1031 # ---------------------------------------------------------------------------
1033 PHONY += depend dep
1034 depend dep:
1035 @echo '*** Warning: make $@ is unnecessary now.'
1037 # ---------------------------------------------------------------------------
1038 # Firmware install
1039 INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1040 export INSTALL_FW_PATH
1042 PHONY += firmware_install
1043 firmware_install: FORCE
1044 @mkdir -p $(objtree)/firmware
1045 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1047 # ---------------------------------------------------------------------------
1048 # Kernel headers
1050 #Default location for installed headers
1051 export INSTALL_HDR_PATH = $(objtree)/usr
1053 hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1055 # If we do an all arch process set dst to asm-$(hdr-arch)
1056 hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1058 PHONY += __headers
1059 __headers: include/linux/version.h scripts_basic FORCE
1060 $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1062 PHONY += headers_install_all
1063 headers_install_all:
1064 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1066 PHONY += headers_install
1067 headers_install: __headers
1068 $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild),, \
1069 $(error Headers not exportable for the $(SRCARCH) architecture))
1070 $(Q)$(MAKE) $(hdr-inst)=include
1071 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst)
1073 PHONY += headers_check_all
1074 headers_check_all: headers_install_all
1075 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1077 PHONY += headers_check
1078 headers_check: headers_install
1079 $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1080 $(Q)$(MAKE) $(hdr-inst)=arch/$(hdr-arch)/include/asm $(hdr-dst) HDRCHECK=1
1082 # ---------------------------------------------------------------------------
1083 # Modules
1085 ifdef CONFIG_MODULES
1087 # By default, build modules as well
1089 all: modules
1091 # Build modules
1093 # A module can be listed more than once in obj-m resulting in
1094 # duplicate lines in modules.order files. Those are removed
1095 # using awk while concatenating to the final file.
1097 PHONY += modules
1098 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1099 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1100 $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.builtin) > $(objtree)/modules.builtin
1101 @$(kecho) ' Building modules, stage 2.';
1102 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1103 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1106 # Target to prepare building external modules
1107 PHONY += modules_prepare
1108 modules_prepare: prepare scripts
1110 # Target to install modules
1111 PHONY += modules_install
1112 modules_install: _modinst_ _modinst_post
1114 PHONY += _modinst_
1115 _modinst_:
1116 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1117 echo "Warning: you may need to install module-init-tools"; \
1118 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1119 sleep 1; \
1121 @rm -rf $(MODLIB)/kernel
1122 @rm -f $(MODLIB)/source
1123 @mkdir -p $(MODLIB)/kernel
1124 @ln -s $(srctree) $(MODLIB)/source
1125 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
1126 rm -f $(MODLIB)/build ; \
1127 ln -s $(objtree) $(MODLIB)/build ; \
1129 @cp -f $(objtree)/modules.order $(MODLIB)/
1130 @cp -f $(objtree)/modules.builtin $(MODLIB)/
1131 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1133 # This depmod is only for convenience to give the initial
1134 # boot a modules.dep even before / is mounted read-write. However the
1135 # boot script depmod is the master version.
1136 PHONY += _modinst_post
1137 _modinst_post: _modinst_
1138 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1139 $(call cmd,depmod)
1141 else # CONFIG_MODULES
1143 # Modules not configured
1144 # ---------------------------------------------------------------------------
1146 modules modules_install: FORCE
1147 @echo
1148 @echo "The present kernel configuration has modules disabled."
1149 @echo "Type 'make config' and enable loadable module support."
1150 @echo "Then build a kernel with module support enabled."
1151 @echo
1152 @exit 1
1154 endif # CONFIG_MODULES
1157 # Cleaning is done on three levels.
1158 # make clean Delete most generated files
1159 # Leave enough to build external modules
1160 # make mrproper Delete the current configuration, and all generated files
1161 # make distclean Remove editor backup files, patch leftover files and the like
1163 # Directories & files removed with 'make clean'
1164 CLEAN_DIRS += $(MODVERDIR)
1165 CLEAN_FILES += vmlinux System.map \
1166 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1168 # Directories & files removed with 'make mrproper'
1169 MRPROPER_DIRS += include/config usr/include include/generated
1170 MRPROPER_FILES += .config .config.old .version .old_version \
1171 include/linux/version.h \
1172 Module.symvers tags TAGS cscope*
1174 # clean - Delete most, but leave enough to build external modules
1176 clean: rm-dirs := $(CLEAN_DIRS)
1177 clean: rm-files := $(CLEAN_FILES)
1178 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1180 PHONY += $(clean-dirs) clean archclean
1181 $(clean-dirs):
1182 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1184 clean: archclean $(clean-dirs)
1185 $(call cmd,rmdirs)
1186 $(call cmd,rmfiles)
1187 @find . $(RCS_FIND_IGNORE) \
1188 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1189 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1190 -o -name '*.symtypes' -o -name 'modules.order' \
1191 -o -name modules.builtin -o -name '.tmp_*.o.*' \
1192 -o -name '*.gcno' \) -type f -print | xargs rm -f
1194 # mrproper - Delete all generated files, including .config
1196 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1197 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1198 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1200 PHONY += $(mrproper-dirs) mrproper archmrproper
1201 $(mrproper-dirs):
1202 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1204 mrproper: clean archmrproper $(mrproper-dirs)
1205 $(call cmd,rmdirs)
1206 $(call cmd,rmfiles)
1208 # distclean
1210 PHONY += distclean
1212 distclean: mrproper
1213 @find $(srctree) $(RCS_FIND_IGNORE) \
1214 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1215 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1216 -o -name '.*.rej' -o -size 0 \
1217 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1218 -type f -print | xargs rm -f
1221 # Packaging of the kernel to various formats
1222 # ---------------------------------------------------------------------------
1223 # rpm target kept for backward compatibility
1224 package-dir := $(srctree)/scripts/package
1226 %pkg: include/config/kernel.release FORCE
1227 $(Q)$(MAKE) $(build)=$(package-dir) $@
1228 rpm: include/config/kernel.release FORCE
1229 $(Q)$(MAKE) $(build)=$(package-dir) $@
1232 # Brief documentation of the typical targets used
1233 # ---------------------------------------------------------------------------
1235 boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1236 boards := $(notdir $(boards))
1237 board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1238 board-dirs := $(sort $(notdir $(board-dirs:/=)))
1240 help:
1241 @echo 'Cleaning targets:'
1242 @echo ' clean - Remove most generated files but keep the config and'
1243 @echo ' enough build support to build external modules'
1244 @echo ' mrproper - Remove all generated files + config + various backup files'
1245 @echo ' distclean - mrproper + remove editor backup and patch files'
1246 @echo ''
1247 @echo 'Configuration targets:'
1248 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1249 @echo ''
1250 @echo 'Other generic targets:'
1251 @echo ' all - Build all targets marked with [*]'
1252 @echo '* vmlinux - Build the bare kernel'
1253 @echo '* modules - Build all modules'
1254 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1255 @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH'
1256 @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1257 @echo ' dir/ - Build all files in dir and below'
1258 @echo ' dir/file.[ois] - Build specified target only'
1259 @echo ' dir/file.ko - Build module including final link'
1260 @echo ' modules_prepare - Set up for building external modules'
1261 @echo ' tags/TAGS - Generate tags file for editors'
1262 @echo ' cscope - Generate cscope index'
1263 @echo ' kernelrelease - Output the release version string'
1264 @echo ' kernelversion - Output the version stored in Makefile'
1265 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1266 echo ' (default: $(INSTALL_HDR_PATH))'; \
1267 echo ''
1268 @echo 'Static analysers'
1269 @echo ' checkstack - Generate a list of stack hogs'
1270 @echo ' namespacecheck - Name space analysis on compiled kernel'
1271 @echo ' versioncheck - Sanity check on version.h usage'
1272 @echo ' includecheck - Check for duplicate included header files'
1273 @echo ' export_report - List the usages of all exported symbols'
1274 @echo ' headers_check - Sanity check on exported headers'
1275 @echo ' headerdep - Detect inclusion cycles in headers'; \
1276 echo ''
1277 @echo 'Kernel packaging:'
1278 @$(MAKE) $(build)=$(package-dir) help
1279 @echo ''
1280 @echo 'Documentation targets:'
1281 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1282 @echo ''
1283 @echo 'Architecture specific targets ($(SRCARCH)):'
1284 @$(if $(archhelp),$(archhelp),\
1285 echo ' No architecture specific help defined for $(SRCARCH)')
1286 @echo ''
1287 @$(if $(boards), \
1288 $(foreach b, $(boards), \
1289 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1290 echo '')
1291 @$(if $(board-dirs), \
1292 $(foreach b, $(board-dirs), \
1293 printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1294 printf " %-16s - Show all of the above\\n" help-boards; \
1295 echo '')
1297 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1298 @echo ' make V=2 [targets] 2 => give reason for rebuild of target'
1299 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1300 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1301 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1302 @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
1303 @echo ' 1: warnings which may be relevant and do not occur too often'
1304 @echo ' 2: warnings which occur quite often but may still be relevant'
1305 @echo ' 3: more obscure warnings, can most likely be ignored'
1307 @echo ''
1308 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1309 @echo 'For further info see the ./README file'
1312 help-board-dirs := $(addprefix help-,$(board-dirs))
1314 help-boards: $(help-board-dirs)
1316 boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1318 $(help-board-dirs): help-%:
1319 @echo 'Architecture specific targets ($(SRCARCH) $*):'
1320 @$(if $(boards-per-dir), \
1321 $(foreach b, $(boards-per-dir), \
1322 printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1323 echo '')
1326 # Documentation targets
1327 # ---------------------------------------------------------------------------
1328 %docs: scripts_basic FORCE
1329 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1331 else # KBUILD_EXTMOD
1334 # External module support.
1335 # When building external modules the kernel used as basis is considered
1336 # read-only, and no consistency checks are made and the make
1337 # system is not used on the basis kernel. If updates are required
1338 # in the basis kernel ordinary make commands (without M=...) must
1339 # be used.
1341 # The following are the only valid targets when building external
1342 # modules.
1343 # make M=dir clean Delete all automatically generated files
1344 # make M=dir modules Make all modules in specified dir
1345 # make M=dir Same as 'make M=dir modules'
1346 # make M=dir modules_install
1347 # Install the modules built in the module directory
1348 # Assumes install directory is already created
1350 # We are always building modules
1351 KBUILD_MODULES := 1
1352 PHONY += crmodverdir
1353 crmodverdir:
1354 $(cmd_crmodverdir)
1356 PHONY += $(objtree)/Module.symvers
1357 $(objtree)/Module.symvers:
1358 @test -e $(objtree)/Module.symvers || ( \
1359 echo; \
1360 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1361 echo " is missing; modules will have no dependencies and modversions."; \
1362 echo )
1364 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1365 PHONY += $(module-dirs) modules
1366 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1367 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1369 modules: $(module-dirs)
1370 @$(kecho) ' Building modules, stage 2.';
1371 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1373 PHONY += modules_install
1374 modules_install: _emodinst_ _emodinst_post
1376 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1377 PHONY += _emodinst_
1378 _emodinst_:
1379 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1380 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1382 PHONY += _emodinst_post
1383 _emodinst_post: _emodinst_
1384 $(call cmd,depmod)
1386 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1388 PHONY += $(clean-dirs) clean
1389 $(clean-dirs):
1390 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1392 clean: rm-dirs := $(MODVERDIR)
1393 clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers \
1394 $(KBUILD_EXTMOD)/modules.order \
1395 $(KBUILD_EXTMOD)/modules.builtin
1396 clean: $(clean-dirs)
1397 $(call cmd,rmdirs)
1398 $(call cmd,rmfiles)
1399 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1400 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1401 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1402 -o -name '*.gcno' \) -type f -print | xargs rm -f
1404 help:
1405 @echo ' Building external modules.'
1406 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1407 @echo ''
1408 @echo ' modules - default target, build the module(s)'
1409 @echo ' modules_install - install the module'
1410 @echo ' clean - remove generated files in module directory only'
1411 @echo ''
1413 # Dummies...
1414 PHONY += prepare scripts
1415 prepare: ;
1416 scripts: ;
1417 endif # KBUILD_EXTMOD
1419 # Generate tags for editors
1420 # ---------------------------------------------------------------------------
1421 quiet_cmd_tags = GEN $@
1422 cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
1424 tags TAGS cscope: FORCE
1425 $(call cmd,tags)
1427 # Scripts to check various things for consistency
1428 # ---------------------------------------------------------------------------
1430 includecheck:
1431 find * $(RCS_FIND_IGNORE) \
1432 -name '*.[hcS]' -type f -print | sort \
1433 | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1435 versioncheck:
1436 find * $(RCS_FIND_IGNORE) \
1437 -name '*.[hcS]' -type f -print | sort \
1438 | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1440 namespacecheck:
1441 $(PERL) $(srctree)/scripts/namespace.pl
1443 export_report:
1444 $(PERL) $(srctree)/scripts/export_report.pl
1446 endif #ifeq ($(config-targets),1)
1447 endif #ifeq ($(mixed-targets),1)
1449 PHONY += checkstack kernelrelease kernelversion
1451 # UML needs a little special treatment here. It wants to use the host
1452 # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone
1453 # else wants $(ARCH), including people doing cross-builds, which means
1454 # that $(SUBARCH) doesn't work here.
1455 ifeq ($(ARCH), um)
1456 CHECKSTACK_ARCH := $(SUBARCH)
1457 else
1458 CHECKSTACK_ARCH := $(ARCH)
1459 endif
1460 checkstack:
1461 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1462 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1464 kernelrelease:
1465 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1466 $(error kernelrelease not valid - run 'make prepare' to update it))
1467 kernelversion:
1468 @echo $(KERNELVERSION)
1470 # Single targets
1471 # ---------------------------------------------------------------------------
1472 # Single targets are compatible with:
1473 # - build with mixed source and output
1474 # - build with separate output dir 'make O=...'
1475 # - external modules
1477 # target-dir => where to store outputfile
1478 # build-dir => directory in kernel source tree to use
1480 ifeq ($(KBUILD_EXTMOD),)
1481 build-dir = $(patsubst %/,%,$(dir $@))
1482 target-dir = $(dir $@)
1483 else
1484 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1485 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1486 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1487 endif
1489 %.s: %.c prepare scripts FORCE
1490 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1491 %.i: %.c prepare scripts FORCE
1492 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1493 %.o: %.c prepare scripts FORCE
1494 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1495 %.lst: %.c prepare scripts FORCE
1496 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1497 %.s: %.S prepare scripts FORCE
1498 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1499 %.o: %.S prepare scripts FORCE
1500 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1501 %.symtypes: %.c prepare scripts FORCE
1502 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1504 # Modules
1505 /: prepare scripts FORCE
1506 $(cmd_crmodverdir)
1507 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1508 $(build)=$(build-dir)
1509 %/: prepare scripts FORCE
1510 $(cmd_crmodverdir)
1511 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1512 $(build)=$(build-dir)
1513 %.ko: prepare scripts FORCE
1514 $(cmd_crmodverdir)
1515 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1516 $(build)=$(build-dir) $(@:.ko=.o)
1517 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1519 # FIXME Should go into a make.lib or something
1520 # ===========================================================================
1522 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1523 cmd_rmdirs = rm -rf $(rm-dirs)
1525 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1526 cmd_rmfiles = rm -f $(rm-files)
1528 # Run depmod only if we have System.map and depmod is executable
1529 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1530 cmd_depmod = \
1531 if [ -r System.map -a -x $(DEPMOD) ]; then \
1532 $(DEPMOD) -ae -F System.map \
1533 $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) ) \
1534 $(KERNELRELEASE); \
1537 # Create temporary dir for module support files
1538 # clean it up only when building all modules
1539 cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1540 $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1542 a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1543 $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(KBUILD_CPPFLAGS) \
1544 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1546 quiet_cmd_as_o_S = AS $@
1547 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1549 # read all saved command lines
1551 targets := $(wildcard $(sort $(targets)))
1552 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1554 ifneq ($(cmd_files),)
1555 $(cmd_files): ; # Do not try to update included dependency files
1556 include $(cmd_files)
1557 endif
1559 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1560 # Usage:
1561 # $(Q)$(MAKE) $(clean)=dir
1562 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1564 endif # skip-makefile
1566 PHONY += FORCE
1567 FORCE:
1569 # Declare the contents of the .PHONY variable as phony. We keep that
1570 # information in a variable so we can use it in if_changed and friends.
1571 .PHONY: $(PHONY)