5 NAME=Affluent Albatross
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 # Add custom flags here to avoid conflict with updates
14 EXTRAVERSION := $(EXTRAVERSION)-omap2
16 # Do not print "Entering directory ..."
17 MAKEFLAGS += --no-print-directory
19 # We are using a recursive build, so we need to do a little thinking
20 # to get the ordering right.
22 # Most importantly: sub-Makefiles should only ever modify files in
23 # their own directory. If in some directory we have a dependency on
24 # a file in another dir (which doesn't happen often, but it's often
25 # unavoidable when linking the built-in.o targets which finally
26 # turn into vmlinux), we will call a sub make in that other dir, and
27 # after that we are sure that everything which is in that other dir
30 # The only cases where we need to modify files which have global
31 # effects are thus separated out and done before the recursive
32 # descending is started. They are now explicitly listed as the
35 # To put more focus on warnings, be less verbose as default
36 # Use 'make V=1' to see the full commands
39 ifeq ("$(origin V)", "command line")
47 # Call sparse as part of compilation of C files
48 # Use 'make C=1' to enable sparse checking
51 ifeq ("$(origin C)", "command line")
52 KBUILD_CHECKSRC = $(C)
55 ifndef KBUILD_CHECKSRC
59 # Use make M=dir to specify directory of external module to build
60 # Old syntax make ... SUBDIRS=$PWD is still supported
61 # Setting the environment variable KBUILD_EXTMOD take precedence
63 KBUILD_EXTMOD ?= $(SUBDIRS)
66 ifeq ("$(origin M)", "command line")
72 # kbuild supports saving output files in a separate directory.
73 # To locate output files in a separate directory two syntaxes are supported.
74 # In both cases the working directory must be the root of the kernel src.
76 # Use "make O=dir/to/store/output/files/"
78 # 2) Set KBUILD_OUTPUT
79 # Set the environment variable KBUILD_OUTPUT to point to the directory
80 # where the output files shall be placed.
81 # export KBUILD_OUTPUT=dir/to/store/output/files/
84 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
88 # KBUILD_SRC is set on invocation of make in OBJ directory
89 # KBUILD_SRC is not intended to be used by the regular user (for now)
92 # OK, Make called in directory where kernel src resides
93 # Do we want to locate output files in a separate directory?
95 ifeq ("$(origin O)", "command line")
100 # That's our default target when none is given on the command line
104 ifneq ($(KBUILD_OUTPUT),)
105 # Invoke a second make in the output directory, passing relevant variables
106 # check that the output directory actually exists
107 saved-output := $(KBUILD_OUTPUT)
108 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
109 $(if $(KBUILD_OUTPUT),, \
110 $(error output directory "$(saved-output)" does not exist))
112 .PHONY: $(MAKECMDGOALS)
114 $(filter-out _all,$(MAKECMDGOALS)) _all:
115 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
116 KBUILD_SRC=$(CURDIR) \
117 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
119 # Leave processing to above invocation of make
121 endif # ifneq ($(KBUILD_OUTPUT),)
122 endif # ifeq ($(KBUILD_SRC),)
124 # We process the rest of the Makefile if this is the final invocation of make
125 ifeq ($(skip-makefile),)
127 # If building an external module we do not care about the all: rule
128 # but instead _all depend on modules
130 ifeq ($(KBUILD_EXTMOD),)
136 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
138 # FIXME - TOPDIR is obsolete, use srctree/objtree
145 export srctree objtree VPATH TOPDIR
148 space := $(nullstring) # end of line
150 # Take the contents of any files called localversion* and the config
151 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be
152 # careful not to include files twice if building in the source
153 # directory. LOCALVERSION from the command line override all of this
155 localver := $(objtree)/localversion* $(srctree)/localversion*
156 localver := $(sort $(wildcard $(localver)))
157 # skip backup files (containing '~')
158 localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f)))
160 LOCALVERSION = $(subst $(space),, \
161 $(shell cat /dev/null $(localver)) \
162 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
164 KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION)
166 # SUBARCH tells the usermode build what the underlying arch is. That is set
167 # first, and if a usermode build is happening, the "ARCH=um" on the command
168 # line overrides the setting of ARCH below. If a native build is happening,
169 # then ARCH is assigned, getting whatever value it gets normally, and
170 # SUBARCH is subsequently ignored.
172 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
173 -e s/arm.*/arm/ -e s/sa110/arm/ \
174 -e s/s390x/s390/ -e s/parisc64/parisc/ )
177 # Cross compiling and selecting different set of gcc/bin-utils
178 # ---------------------------------------------------------------------------
180 # When performing cross compilation for other architectures ARCH shall be set
181 # to the target architecture. (See arch/* for the possibilities).
182 # ARCH can be set during invocation of make:
184 # Another way is to have ARCH set in the environment.
185 # The default ARCH is the host where make is executed.
187 # CROSS_COMPILE specify the prefix used for all executables used
188 # during compilation. Only gcc and related bin-utils executables
189 # are prefixed with $(CROSS_COMPILE).
190 # CROSS_COMPILE can be set on the command line
191 # make CROSS_COMPILE=ia64-linux-
192 # Alternatively CROSS_COMPILE can be set in the environment.
193 # Default value for CROSS_COMPILE is not to prefix executables
194 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
197 CROSS_COMPILE ?= arm-linux-
199 # Architecture as present in compile.h
200 UTS_MACHINE := $(ARCH)
202 # SHELL used by kbuild
203 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
204 else if [ -x /bin/bash ]; then echo /bin/bash; \
205 else echo sh; fi ; fi)
209 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
212 # Decide whether to build built-in, modular, or both.
213 # Normally, just do built-in.
218 # If we have only "make modules", don't compile built-in objects.
219 # When we're building modules with modversions, we need to consider
220 # the built-in objects during the descend as well, in order to
221 # make sure the checksums are uptodate before we record them.
223 ifeq ($(MAKECMDGOALS),modules)
224 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
227 # If we have "make <whatever> modules", compile modules
228 # in addition to whatever we do anyway.
229 # Just "make" or "make all" shall build modules as well
231 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
235 ifeq ($(MAKECMDGOALS),)
239 export KBUILD_MODULES KBUILD_BUILTIN
240 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
243 # ---------------------------------------------------------------------------
245 # Normally, we echo the whole command before executing it. By making
246 # that echo $($(quiet)$(cmd)), we now have the possibility to set
247 # $(quiet) to choose other forms of output instead, e.g.
249 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
250 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
252 # If $(quiet) is empty, the whole command will be printed.
253 # If it is set to "quiet_", only the short version will be printed.
254 # If it is set to "silent_", nothing wil be printed at all, since
255 # the variable $(silent_cmd_cc_o_c) doesn't exist.
257 # A simple variant is to prefix commands with $(Q) - that's usefull
258 # for commands that shall be hidden in non-verbose mode.
262 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
263 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
265 ifeq ($(KBUILD_VERBOSE),1)
273 # If the user is running make -s (silent mode), suppress echoing of
276 ifneq ($(findstring s,$(MAKEFLAGS)),)
280 export quiet Q KBUILD_VERBOSE
283 # cc support functions to be used (only) in arch/$(ARCH)/Makefile
284 # See documentation in Documentation/kbuild/makefiles.txt
287 # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
289 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
290 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
292 # For backward compatibility
293 check_gcc = $(warning check_gcc is deprecated - use cc-option) \
294 $(call cc-option, $(1),$(2))
297 # Usage: flag := $(call cc-option-yn, -march=winchip-c6)
298 cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
299 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
302 # Prefix align with either -falign or -malign
303 cc-option-align = $(subst -functions=0,,\
304 $(call cc-option,-falign-functions=0,-malign-functions=0))
307 # Usage gcc-ver := $(call cc-version $(CC))
308 cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
309 $(if $(1), $(1), $(CC)))
312 # Look for make include files relative to root of kernel src
313 MAKEFLAGS += --include-dir=$(srctree)
315 # We need some generic definitions
316 include $(srctree)/scripts/Kbuild.include
318 # For maximum performance (+ possibly random breakage, uncomment
323 # Make variables (CC, etc...)
325 AS = $(CROSS_COMPILE)as
326 LD = $(CROSS_COMPILE)ld
327 CC = $(CROSS_COMPILE)gcc
329 AR = $(CROSS_COMPILE)ar
330 NM = $(CROSS_COMPILE)nm
331 STRIP = $(CROSS_COMPILE)strip
332 OBJCOPY = $(CROSS_COMPILE)objcopy
333 OBJDUMP = $(CROSS_COMPILE)objdump
335 GENKSYMS = scripts/genksyms/genksyms
336 DEPMOD = /sbin/depmod
337 KALLSYMS = scripts/kallsyms
341 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
343 CFLAGS_MODULE = $(MODFLAGS)
344 AFLAGS_MODULE = $(MODFLAGS)
350 # Use LINUXINCLUDE when you must reference the include/ directory.
351 # Needed to be compatible with the O= option
352 LINUXINCLUDE := -Iinclude \
353 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
354 -imacros include/linux/autoconf.h
356 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
358 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
359 -fno-strict-aliasing -fno-common \
361 AFLAGS := -D__ASSEMBLY__
363 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \
364 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
365 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
366 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
368 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
369 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
370 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
372 # When compiling out-of-tree modules, put MODVERDIR in the module
373 # tree rather than in the kernel tree. The kernel tree might
375 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
377 # Files to ignore in find ... statements
379 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
380 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
382 # ===========================================================================
383 # Rules shared between *config targets and build targets
385 # Basic helpers built in scripts/
386 .PHONY: scripts_basic
388 $(Q)$(MAKE) $(build)=scripts/basic
390 # To avoid any implicit rule to kick in, define an empty command.
391 scripts/basic/%: scripts_basic ;
393 .PHONY: outputmakefile
394 # outputmakefile generate a Makefile to be placed in output directory, if
395 # using a seperate output directory. This allows convinient use
396 # of make in output directory
398 $(Q)if test ! $(srctree) -ef $(objtree); then \
399 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
400 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \
401 > $(objtree)/Makefile; \
402 echo ' GEN $(objtree)/Makefile'; \
405 # To make sure we do not include .config for any of the *config targets
406 # catch them early, and hand them over to scripts/kconfig/Makefile
407 # It is allowed to specify more targets when calling make, including
408 # mixing *config targets and build targets.
409 # For example 'make oldconfig all'.
410 # Detect when mixed targets is specified, and make a second invocation
411 # of make so .config is not included in this case either (for *config).
413 no-dot-config-targets := clean mrproper distclean \
414 cscope TAGS tags help %docs check%
420 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
421 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
426 ifeq ($(KBUILD_EXTMOD),)
427 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
429 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
435 ifeq ($(mixed-targets),1)
436 # ===========================================================================
437 # We're called with mixed targets (*config and build targets).
438 # Handle them one by one.
441 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
444 ifeq ($(config-targets),1)
445 # ===========================================================================
446 # *config targets only - make sure prerequisites are updated, and descend
447 # in scripts/kconfig to make the *config target
449 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
450 # KBUILD_DEFCONFIG may point out an alternative default configuration
451 # used for 'make defconfig'
452 include $(srctree)/arch/$(ARCH)/Makefile
453 export KBUILD_DEFCONFIG
455 config %config: scripts_basic outputmakefile FORCE
456 $(Q)mkdir -p include/linux
457 $(Q)$(MAKE) $(build)=scripts/kconfig $@
460 # ===========================================================================
461 # Build targets only - this includes vmlinux, arch specific targets, clean
462 # targets and others. In general all targets except *config targets.
464 ifeq ($(KBUILD_EXTMOD),)
465 # Additional helpers built in scripts/
466 # Carefully list dependencies so we do not try to build scripts twice
469 scripts: scripts_basic include/config/MARKER
470 $(Q)$(MAKE) $(build)=$(@)
472 scripts_basic: include/linux/autoconf.h
474 # Objects we will link into vmlinux / subdirs we need to visit
476 drivers-y := drivers/ sound/
480 endif # KBUILD_EXTMOD
482 ifeq ($(dot-config),1)
483 # In this section, we need .config
485 # Read in dependencies to all Kconfig* files, make sure to run
486 # oldconfig if changes are detected.
491 # If .config needs to be updated, it will be done via the dependency
492 # that autoconf has on .config.
493 # To avoid any implicit rule to kick in, define an empty command
496 # If .config is newer than include/linux/autoconf.h, someone tinkered
497 # with it and forgot to run make oldconfig
498 include/linux/autoconf.h: .config
499 $(Q)mkdir -p include/linux
500 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
502 # Dummy target needed, because used as prerequisite
503 include/linux/autoconf.h: ;
506 # The all: target is the default when no target is given on the
508 # This allow a user to issue only 'make' to build a kernel including modules
509 # Defaults vmlinux but it is usually overriden in the arch makefile
512 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
518 #Add align options if CONFIG_CC_* is not equal to 0
519 add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1)))
520 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions)
521 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels)
522 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops)
523 CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps)
525 ifdef CONFIG_FRAME_POINTER
526 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
528 CFLAGS += -fomit-frame-pointer
531 ifdef CONFIG_DEBUG_INFO
535 include $(srctree)/arch/$(ARCH)/Makefile
537 # arch Makefile may override CC so keep this after arch Makefile is included
538 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
539 CHECKFLAGS += $(NOSTDINC_FLAGS)
541 # warn about C99 declaration after statement
542 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
544 # disable pointer signedness warnings in gcc 4.0
545 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
547 # Default kernel image to build when no specific target is given.
548 # KBUILD_IMAGE may be overruled on the commandline or
549 # set in the environment
550 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
552 export KBUILD_IMAGE ?= vmlinux
555 # INSTALL_PATH specifies where to place the updated kernel and system map
556 # images. Default is /boot, but you can set it to other values
557 export INSTALL_PATH ?= /boot
559 # If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests
560 # and try to determine if the current source tree is a release tree, of any sort,
561 # or if is a pure development tree.
563 # A 'release tree' is any tree with a git TAG associated
564 # with it. The primary goal of this is to make it safe for a native
565 # git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to
566 # continue developing against the current Linus tree, without having the Linus
567 # tree overwrite the 2.6.9 tree when installed.
569 # Currently, only git is supported.
570 # Other SCMs can edit scripts/setlocalversion and add the appropriate
574 ifdef CONFIG_LOCALVERSION_AUTO
575 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree))
576 LOCALVERSION := $(LOCALVERSION)$(localversion-auto)
580 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
581 # relocations required by build roots. This is not defined in the
582 # makefile but the arguement can be passed to make if needed.
585 MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
589 ifeq ($(KBUILD_EXTMOD),)
590 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
592 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
593 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
594 $(net-y) $(net-m) $(libs-y) $(libs-m)))
596 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
598 $(core-n) $(core-) $(drivers-n) $(drivers-) \
599 $(net-n) $(net-) $(libs-n) $(libs-))))
601 init-y := $(patsubst %/, %/built-in.o, $(init-y))
602 core-y := $(patsubst %/, %/built-in.o, $(core-y))
603 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
604 net-y := $(patsubst %/, %/built-in.o, $(net-y))
605 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
606 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
607 libs-y := $(libs-y1) $(libs-y2)
610 # ---------------------------------------------------------------------------
611 # vmlinux is build from the objects selected by $(vmlinux-init) and
612 # $(vmlinux-main). Most are built-in.o files from top-level directories
613 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
614 # Ordering when linking is important, and $(vmlinux-init) must be first.
619 # +-< $(vmlinux-init)
620 # | +--< init/version.o + more
622 # +--< $(vmlinux-main)
623 # | +--< driver/built-in.o mm/built-in.o + more
625 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
627 # vmlinux version (uname -v) cannot be updated during normal
628 # descending-into-subdirs phase since we do not yet know if we need to
630 # Therefore this step is delayed until just before final link of vmlinux -
631 # except in the kallsyms case where it is done just before adding the
632 # symbols to the kernel.
634 # System.map is generated to document addresses of all kernel symbols
636 vmlinux-init := $(head-y) $(init-y)
637 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
638 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
639 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
641 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
642 # May be overridden by arch/$(ARCH)/Makefile
643 quiet_cmd_vmlinux__ ?= LD $@
644 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
645 -T $(vmlinux-lds) $(vmlinux-init) \
646 --start-group $(vmlinux-main) --end-group \
647 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
649 # Generate new vmlinux version
650 quiet_cmd_vmlinux_version = GEN .version
651 cmd_vmlinux_version = set -e; \
652 if [ ! -r .version ]; then \
656 mv .version .old_version; \
657 expr 0$$(cat .old_version) + 1 >.version; \
659 $(MAKE) $(build)=init
661 # Generate System.map
662 quiet_cmd_sysmap = SYSMAP
663 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
666 # If CONFIG_KALLSYMS is set .version is already updated
667 # Generate System.map and verify that the content is consistent
668 # Use + in front of the vmlinux_version rule to silent warning with make -j2
669 # First command is ':' to allow us to use + in front of the rule
670 define rule_vmlinux__
672 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
674 $(call cmd,vmlinux__)
675 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
677 $(Q)$(if $($(quiet)cmd_sysmap), \
678 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
679 $(cmd_sysmap) $@ System.map; \
680 if [ $$? -ne 0 ]; then \
688 ifdef CONFIG_KALLSYMS
689 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
690 # It's a three stage process:
691 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
693 # Running kallsyms on that gives us .tmp_kallsyms1.o with
694 # the right size - vmlinux version (uname -v) is updated during this step
695 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
696 # but due to the added section, some addresses have shifted.
697 # From here, we generate a correct .tmp_kallsyms2.o
698 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
699 # o Verify that the System.map from vmlinux matches the map from
700 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
701 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
702 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
703 # temporary bypass to allow the kernel to be built while the
704 # maintainers work out what went wrong with kallsyms.
706 ifdef CONFIG_KALLSYMS_EXTRA_PASS
712 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
714 define verify_kallsyms
715 $(Q)$(if $($(quiet)cmd_sysmap), \
716 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
717 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
718 $(Q)cmp -s System.map .tmp_System.map || \
719 (echo Inconsistent kallsyms data; \
720 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
721 rm .tmp_kallsyms* ; /bin/false )
724 # Update vmlinux version before link
725 # Use + in front of this rule to silent warning about make -j1
726 # First command is ':' to allow us to use + in front of this rule
727 cmd_ksym_ld = $(cmd_vmlinux__)
730 +$(call cmd,vmlinux_version)
731 $(call cmd,vmlinux__)
732 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
735 # Generate .S file with all kernel symbols
736 quiet_cmd_kallsyms = KSYM $@
737 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
738 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
740 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
741 $(call if_changed_dep,as_o_S)
743 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
746 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
747 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
748 $(call if_changed_rule,ksym_ld)
750 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
751 $(call if_changed,vmlinux__)
753 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
754 $(call if_changed,vmlinux__)
756 # Needs to visit scripts/ before $(KALLSYMS) can be used.
757 $(KALLSYMS): scripts ;
759 # Generate some data for debugging strange kallsyms problems
760 debug_kallsyms: .tmp_map$(last_kallsyms)
762 .tmp_map%: .tmp_vmlinux% FORCE
763 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
769 endif # ifdef CONFIG_KALLSYMS
771 # vmlinux image - including updated kernel symbols
772 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
773 $(call if_changed_rule,vmlinux__)
774 $(Q)rm -f .old_version
776 # The actual objects are generated when descending,
777 # make sure no implicit rule kicks in
778 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
780 # Handle descending into subdirectories listed in $(vmlinux-dirs)
781 # Preset locale variables to speed up the build process. Limit locale
782 # tweaks to this spot to avoid wrong language settings when running
783 # make menuconfig etc.
784 # Error messages still appears in the original language
786 .PHONY: $(vmlinux-dirs)
787 $(vmlinux-dirs): prepare scripts
788 $(Q)$(MAKE) $(build)=$@
790 # Things we need to do before we recursively start building the kernel
791 # or the modules are listed in "prepare".
792 # A multi level approach is used. prepareN is processed before prepareN-1.
793 # archprepare is used in arch Makefiles and when processed asm symlink,
794 # version.h and scripts_basic is processed / created.
796 # Listed in dependency order
797 .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3
799 # prepare-all is deprecated, use prepare as valid replacement
802 # prepare3 is used to check if we are building in a separate output directory,
804 # 1) Check that make has not been executed in the kernel src $(srctree)
805 # 2) Create the include2 directory, used for the second asm symlink
808 ifneq ($(KBUILD_SRC),)
809 @echo ' Using $(srctree) as source for kernel'
810 $(Q)if [ -f $(srctree)/.config ]; then \
811 echo " $(srctree) is not clean, please run 'make mrproper'";\
812 echo " in the '$(srctree)' directory.";\
815 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
816 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
819 # prepare2 creates a makefile if using a separate output directory
820 prepare2: prepare3 outputmakefile
822 prepare1: prepare2 include/linux/version.h include/asm \
823 include/config/MARKER
824 ifneq ($(KBUILD_MODULES),)
825 $(Q)rm -rf $(MODVERDIR)
826 $(Q)mkdir -p $(MODVERDIR)
829 archprepare: prepare1 scripts_basic
831 prepare0: archprepare FORCE
832 $(Q)$(MAKE) $(build)=.
834 # All the preparing..
835 prepare prepare-all: prepare0
837 # Leave this as default for preprocessing vmlinux.lds.S, which is now
838 # done in arch/$(ARCH)/kernel/Makefile
840 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
843 # ---------------------------------------------------------------------------
845 %.s: %.c scripts FORCE
846 $(Q)$(MAKE) $(build)=$(@D) $@
847 %.i: %.c scripts FORCE
848 $(Q)$(MAKE) $(build)=$(@D) $@
849 %.o: %.c scripts FORCE
850 $(Q)$(MAKE) $(build)=$(@D) $@
852 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o)
853 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
854 %/: scripts prepare FORCE
855 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D)
856 %.lst: %.c scripts FORCE
857 $(Q)$(MAKE) $(build)=$(@D) $@
858 %.s: %.S scripts FORCE
859 $(Q)$(MAKE) $(build)=$(@D) $@
860 %.o: %.S scripts FORCE
861 $(Q)$(MAKE) $(build)=$(@D) $@
863 # FIXME: The asm symlink changes when $(ARCH) changes. That's
864 # hard to detect, but I suppose "make mrproper" is a good idea
865 # before switching between archs anyway.
868 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
869 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
870 @ln -fsn asm-$(ARCH) $@
872 # Split autoconf.h into include/linux/config/*
874 include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h
875 @echo ' SPLIT include/linux/autoconf.h -> include/config/*'
876 @scripts/basic/split-include include/linux/autoconf.h include/config
879 # Generate some files
880 # ---------------------------------------------------------------------------
882 # KERNELRELEASE can change from a few different places, meaning version.h
883 # needs to be updated, so this check is forced on all builds
887 define filechk_version.h
888 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
889 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
892 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \
893 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \
894 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \
898 include/linux/version.h: $(srctree)/Makefile FORCE
899 $(call filechk,version.h)
901 # ---------------------------------------------------------------------------
905 @echo '*** Warning: make $@ is unnecessary now.'
907 # ---------------------------------------------------------------------------
912 # By default, build modules as well
919 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
920 @echo ' Building modules, stage 2.';
921 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
924 # Target to prepare building external modules
925 .PHONY: modules_prepare
926 modules_prepare: prepare scripts
928 # Target to install modules
929 .PHONY: modules_install
930 modules_install: _modinst_ _modinst_post
934 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
935 echo "Warning: you may need to install module-init-tools"; \
936 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
939 @rm -rf $(MODLIB)/kernel
940 @rm -f $(MODLIB)/source
941 @mkdir -p $(MODLIB)/kernel
942 @ln -s $(srctree) $(MODLIB)/source
943 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
944 rm -f $(MODLIB)/build ; \
945 ln -s $(objtree) $(MODLIB)/build ; \
947 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
949 # If System.map exists, run depmod. This deliberately does not have a
950 # dependency on System.map since that would run the dependency tree on
951 # vmlinux. This depmod is only for convenience to give the initial
952 # boot a modules.dep even before / is mounted read-write. However the
953 # boot script depmod is the master version.
954 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
957 depmod_opts := -b $(INSTALL_MOD_PATH) -r
959 .PHONY: _modinst_post
960 _modinst_post: _modinst_
961 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
963 else # CONFIG_MODULES
965 # Modules not configured
966 # ---------------------------------------------------------------------------
968 modules modules_install: FORCE
970 @echo "The present kernel configuration has modules disabled."
971 @echo "Type 'make config' and enable loadable module support."
972 @echo "Then build a kernel with module support enabled."
976 endif # CONFIG_MODULES
979 # Cleaning is done on three levels.
980 # make clean Delete most generated files
981 # Leave enough to build external modules
982 # make mrproper Delete the current configuration, and all generated files
983 # make distclean Remove editor backup files, patch leftover files and the like
985 # Directories & files removed with 'make clean'
986 CLEAN_DIRS += $(MODVERDIR)
987 CLEAN_FILES += vmlinux System.map \
988 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
990 # Directories & files removed with 'make mrproper'
991 MRPROPER_DIRS += include/config include2
992 MRPROPER_FILES += .config .config.old include/asm .version \
993 include/linux/autoconf.h include/linux/version.h \
994 Module.symvers tags TAGS cscope*
996 # clean - Delete most, but leave enough to build external modules
998 clean: rm-dirs := $(CLEAN_DIRS)
999 clean: rm-files := $(CLEAN_FILES)
1000 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1002 .PHONY: $(clean-dirs) clean archclean
1004 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1006 clean: archclean $(clean-dirs)
1009 @find . $(RCS_FIND_IGNORE) \
1010 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1011 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1012 -type f -print | xargs rm -f
1014 # mrproper - Delete all generated files, including .config
1016 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1017 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1018 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1020 .PHONY: $(mrproper-dirs) mrproper archmrproper
1022 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1024 mrproper: clean archmrproper $(mrproper-dirs)
1033 @find $(srctree) $(RCS_FIND_IGNORE) \
1034 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1035 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1036 -o -name '.*.rej' -o -size 0 \
1037 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1038 -type f -print | xargs rm -f
1041 # Packaging of the kernel to various formats
1042 # ---------------------------------------------------------------------------
1043 # rpm target kept for backward compatibility
1044 package-dir := $(srctree)/scripts/package
1049 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1051 $(Q)$(MAKE) -f $(package-dir)/Makefile $@
1054 # Brief documentation of the typical targets used
1055 # ---------------------------------------------------------------------------
1057 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1058 boards := $(notdir $(boards))
1061 @echo 'Cleaning targets:'
1062 @echo ' clean - remove most generated files but keep the config'
1063 @echo ' mrproper - remove all generated files + config + various backup files'
1065 @echo 'Configuration targets:'
1066 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1068 @echo 'Other generic targets:'
1069 @echo ' all - Build all targets marked with [*]'
1070 @echo '* vmlinux - Build the bare kernel'
1071 @echo '* modules - Build all modules'
1072 @echo ' modules_install - Install all modules'
1073 @echo ' dir/ - Build all files in dir and below'
1074 @echo ' dir/file.[ois] - Build specified target only'
1075 @echo ' dir/file.ko - Build module including final link'
1076 @echo ' rpm - Build a kernel as an RPM package'
1077 @echo ' tags/TAGS - Generate tags file for editors'
1078 @echo ' cscope - Generate cscope index'
1079 @echo ' kernelrelease - Output the release version string'
1081 @echo 'Static analysers'
1082 @echo ' buildcheck - List dangling references to vmlinux discarded sections'
1083 @echo ' and init sections from non-init sections'
1084 @echo ' checkstack - Generate a list of stack hogs'
1085 @echo ' namespacecheck - Name space analysis on compiled kernel'
1087 @echo 'Kernel packaging:'
1088 @$(MAKE) -f $(package-dir)/Makefile help
1090 @echo 'Documentation targets:'
1091 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1093 @echo 'Architecture specific targets ($(ARCH)):'
1094 @$(if $(archhelp),$(archhelp),\
1095 echo ' No architecture specific help defined for $(ARCH)')
1098 $(foreach b, $(boards), \
1099 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1102 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1103 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1104 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)'
1105 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)'
1107 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1108 @echo 'For further info see the ./README file'
1111 # Documentation targets
1112 # ---------------------------------------------------------------------------
1113 %docs: scripts_basic FORCE
1114 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1116 else # KBUILD_EXTMOD
1119 # External module support.
1120 # When building external modules the kernel used as basis is considered
1121 # read-only, and no consistency checks are made and the make
1122 # system is not used on the basis kernel. If updates are required
1123 # in the basis kernel ordinary make commands (without M=...) must
1126 # The following are the only valid targets when building external
1128 # make M=dir clean Delete all automatically generated files
1129 # make M=dir modules Make all modules in specified dir
1130 # make M=dir Same as 'make M=dir modules'
1131 # make M=dir modules_install
1132 # Install the modules build in the module directory
1133 # Assumes install directory is already created
1135 # We are always building modules
1139 $(Q)mkdir -p $(MODVERDIR)
1141 .PHONY: $(objtree)/Module.symvers
1142 $(objtree)/Module.symvers:
1143 @test -e $(objtree)/Module.symvers || ( \
1145 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1146 echo " is missing; modules will have no dependencies and modversions."; \
1149 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1150 .PHONY: $(module-dirs) modules
1151 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1152 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1154 modules: $(module-dirs)
1155 @echo ' Building modules, stage 2.';
1156 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1158 .PHONY: modules_install
1160 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1162 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1164 .PHONY: $(clean-dirs) clean
1166 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1168 clean: rm-dirs := $(MODVERDIR)
1169 clean: $(clean-dirs)
1171 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1172 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1173 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1174 -type f -print | xargs rm -f
1177 @echo ' Building external modules.'
1178 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1180 @echo ' modules - default target, build the module(s)'
1181 @echo ' modules_install - install the module'
1182 @echo ' clean - remove generated files in module directory only'
1184 endif # KBUILD_EXTMOD
1186 # Generate tags for editors
1187 # ---------------------------------------------------------------------------
1189 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1190 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1191 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1193 ifeq ($(src),$(obj))
1196 __srctree = $(srctree)/
1199 ALLSOURCE_ARCHS := $(ARCH)
1202 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1203 \( -name include -o -name arch \) -prune -o \
1204 -name '*.[chS]' -print; \
1205 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1206 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1207 -name '*.[chS]' -print; \
1209 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1210 -name '*.[chS]' -print; \
1211 find $(__srctree)include $(RCS_FIND_IGNORE) \
1212 \( -name config -o -name 'asm-*' \) -prune \
1213 -o -name '*.[chS]' -print; \
1214 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1215 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1216 -name '*.[chS]' -print; \
1218 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1219 -name '*.[chS]' -print )
1222 quiet_cmd_cscope-file = FILELST cscope.files
1223 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1225 quiet_cmd_cscope = MAKE cscope.out
1226 cmd_cscope = cscope -b
1229 $(call cmd,cscope-file)
1232 quiet_cmd_TAGS = MAKE $@
1235 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1236 $(all-sources) | xargs etags $$ETAGSF -a
1243 quiet_cmd_tags = MAKE $@
1246 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \
1247 $(all-sources) | xargs ctags $$CTAGSF -a
1254 # Scripts to check various things for consistency
1255 # ---------------------------------------------------------------------------
1258 find * $(RCS_FIND_IGNORE) \
1259 -name '*.[hcS]' -type f -print | sort \
1260 | xargs $(PERL) -w scripts/checkincludes.pl
1263 find * $(RCS_FIND_IGNORE) \
1264 -name '*.[hcS]' -type f -print | sort \
1265 | xargs $(PERL) -w scripts/checkversion.pl
1268 $(PERL) $(srctree)/scripts/reference_discarded.pl
1269 $(PERL) $(srctree)/scripts/reference_init.pl
1272 $(PERL) $(srctree)/scripts/namespace.pl
1274 endif #ifeq ($(config-targets),1)
1275 endif #ifeq ($(mixed-targets),1)
1279 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1280 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1283 @echo $(KERNELRELEASE)
1285 # FIXME Should go into a make.lib or something
1286 # ===========================================================================
1288 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1289 cmd_rmdirs = rm -rf $(rm-dirs)
1291 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1292 cmd_rmfiles = rm -f $(rm-files)
1295 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1296 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1297 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o)
1299 quiet_cmd_as_o_S = AS $@
1300 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1302 # read all saved command lines
1304 targets := $(wildcard $(sort $(targets)))
1305 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1307 ifneq ($(cmd_files),)
1308 $(cmd_files): ; # Do not try to update included dependency files
1309 include $(cmd_files)
1312 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1314 # $(Q)$(MAKE) $(clean)=dir
1315 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1317 endif # skip-makefile