1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 16 4EXTRAVERSION =-rc4 5NAME=Sliding Snow Leopard 6 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. 12 13# Do not print "Entering directory ..." 14MAKEFLAGS += --no-print-directory 15 16# We are using a recursive build, so we need to do a little thinking 17# to get the ordering right. 18# 19# Most importantly: sub-Makefiles should only ever modify files in 20# their own directory. If in some directory we have a dependency on 21# a file in another dir (which doesn't happen often, but it's often 22# unavoidable when linking the built-in.o targets which finally 23# turn into vmlinux), we will call a sub make in that other dir, and 24# after that we are sure that everything which is in that other dir 25# is now up to date. 26# 27# The only cases where we need to modify files which have global 28# effects are thus separated out and done before the recursive 29# descending is started. They are now explicitly listed as the 30# prepare rule. 31 32# To put more focus on warnings, be less verbose as default 33# Use 'make V=1' to see the full commands 34 35ifdef V 36 ifeq ("$(origin V)", "command line") 37 KBUILD_VERBOSE = $(V) 38 endif 39endif 40ifndef KBUILD_VERBOSE 41 KBUILD_VERBOSE = 0 42endif 43 44# Call sparse as part of compilation of C files 45# Use 'make C=1' to enable sparse checking 46 47ifdef C 48 ifeq ("$(origin C)", "command line") 49 KBUILD_CHECKSRC = $(C) 50 endif 51endif 52ifndef KBUILD_CHECKSRC 53 KBUILD_CHECKSRC = 0 54endif 55 56# Use make M=dir to specify directory of external module to build 57# Old syntax make ... SUBDIRS=$PWD is still supported 58# Setting the environment variable KBUILD_EXTMOD take precedence 59ifdef SUBDIRS 60 KBUILD_EXTMOD ?= $(SUBDIRS) 61endif 62ifdef M 63 ifeq ("$(origin M)", "command line") 64 KBUILD_EXTMOD := $(M) 65 endif 66endif 67 68 69# kbuild supports saving output files in a separate directory. 70# To locate output files in a separate directory two syntaxes are supported. 71# In both cases the working directory must be the root of the kernel src. 72# 1) O= 73# Use "make O=dir/to/store/output/files/" 74# 75# 2) Set KBUILD_OUTPUT 76# Set the environment variable KBUILD_OUTPUT to point to the directory 77# where the output files shall be placed. 78# export KBUILD_OUTPUT=dir/to/store/output/files/ 79# make 80# 81# The O= assignment takes precedence over the KBUILD_OUTPUT environment 82# variable. 83 84 85# KBUILD_SRC is set on invocation of make in OBJ directory 86# KBUILD_SRC is not intended to be used by the regular user (for now) 87ifeq ($(KBUILD_SRC),) 88 89# OK, Make called in directory where kernel src resides 90# Do we want to locate output files in a separate directory? 91ifdef O 92 ifeq ("$(origin O)", "command line") 93 KBUILD_OUTPUT := $(O) 94 endif 95endif 96 97# That's our default target when none is given on the command line 98PHONY := _all 99_all: 100 101ifneq ($(KBUILD_OUTPUT),) 102# Invoke a second make in the output directory, passing relevant variables 103# check that the output directory actually exists 104saved-output := $(KBUILD_OUTPUT) 105KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 106$(if $(KBUILD_OUTPUT),, \ 107 $(error output directory "$(saved-output)" does not exist)) 108 109PHONY += $(MAKECMDGOALS) 110 111$(filter-out _all,$(MAKECMDGOALS)) _all: 112 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 113 KBUILD_SRC=$(CURDIR) \ 114 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 115 116# Leave processing to above invocation of make 117skip-makefile := 1 118endif # ifneq ($(KBUILD_OUTPUT),) 119endif # ifeq ($(KBUILD_SRC),) 120 121# We process the rest of the Makefile if this is the final invocation of make 122ifeq ($(skip-makefile),) 123 124# If building an external module we do not care about the all: rule 125# but instead _all depend on modules 126PHONY += all 127ifeq ($(KBUILD_EXTMOD),) 128_all: all 129else 130_all: modules 131endif 132 133srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 134TOPDIR := $(srctree) 135# FIXME - TOPDIR is obsolete, use srctree/objtree 136objtree := $(CURDIR) 137src := $(srctree) 138obj := $(objtree) 139 140VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 141 142export srctree objtree VPATH TOPDIR 143 144 145# SUBARCH tells the usermode build what the underlying arch is. That is set 146# first, and if a usermode build is happening, the "ARCH=um" on the command 147# line overrides the setting of ARCH below. If a native build is happening, 148# then ARCH is assigned, getting whatever value it gets normally, and 149# SUBARCH is subsequently ignored. 150 151SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 152 -e s/arm.*/arm/ -e s/sa110/arm/ \ 153 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 154 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 155 156# Cross compiling and selecting different set of gcc/bin-utils 157# --------------------------------------------------------------------------- 158# 159# When performing cross compilation for other architectures ARCH shall be set 160# to the target architecture. (See arch/* for the possibilities). 161# ARCH can be set during invocation of make: 162# make ARCH=ia64 163# Another way is to have ARCH set in the environment. 164# The default ARCH is the host where make is executed. 165 166# CROSS_COMPILE specify the prefix used for all executables used 167# during compilation. Only gcc and related bin-utils executables 168# are prefixed with $(CROSS_COMPILE). 169# CROSS_COMPILE can be set on the command line 170# make CROSS_COMPILE=ia64-linux- 171# Alternatively CROSS_COMPILE can be set in the environment. 172# Default value for CROSS_COMPILE is not to prefix executables 173# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 174 175ARCH ?= $(SUBARCH) 176CROSS_COMPILE ?= 177 178# Architecture as present in compile.h 179UTS_MACHINE := $(ARCH) 180 181# SHELL used by kbuild 182CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 183 else if [ -x /bin/bash ]; then echo /bin/bash; \ 184 else echo sh; fi ; fi) 185 186HOSTCC = gcc 187HOSTCXX = g++ 188HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 189HOSTCXXFLAGS = -O2 190 191# Decide whether to build built-in, modular, or both. 192# Normally, just do built-in. 193 194KBUILD_MODULES := 195KBUILD_BUILTIN := 1 196 197# If we have only "make modules", don't compile built-in objects. 198# When we're building modules with modversions, we need to consider 199# the built-in objects during the descend as well, in order to 200# make sure the checksums are uptodate before we record them. 201 202ifeq ($(MAKECMDGOALS),modules) 203 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 204endif 205 206# If we have "make <whatever> modules", compile modules 207# in addition to whatever we do anyway. 208# Just "make" or "make all" shall build modules as well 209 210ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 211 KBUILD_MODULES := 1 212endif 213 214ifeq ($(MAKECMDGOALS),) 215 KBUILD_MODULES := 1 216endif 217 218export KBUILD_MODULES KBUILD_BUILTIN 219export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 220 221# Beautify output 222# --------------------------------------------------------------------------- 223# 224# Normally, we echo the whole command before executing it. By making 225# that echo $($(quiet)$(cmd)), we now have the possibility to set 226# $(quiet) to choose other forms of output instead, e.g. 227# 228# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 229# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 230# 231# If $(quiet) is empty, the whole command will be printed. 232# If it is set to "quiet_", only the short version will be printed. 233# If it is set to "silent_", nothing wil be printed at all, since 234# the variable $(silent_cmd_cc_o_c) doesn't exist. 235# 236# A simple variant is to prefix commands with $(Q) - that's useful 237# for commands that shall be hidden in non-verbose mode. 238# 239# $(Q)ln $@ :< 240# 241# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 242# If KBUILD_VERBOSE equals 1 then the above command is displayed. 243 244ifeq ($(KBUILD_VERBOSE),1) 245 quiet = 246 Q = 247else 248 quiet=quiet_ 249 Q = @ 250endif 251 252# If the user is running make -s (silent mode), suppress echoing of 253# commands 254 255ifneq ($(findstring s,$(MAKEFLAGS)),) 256 quiet=silent_ 257endif 258 259export quiet Q KBUILD_VERBOSE 260 261 262# Look for make include files relative to root of kernel src 263MAKEFLAGS += --include-dir=$(srctree) 264 265# We need some generic definitions 266include $(srctree)/scripts/Kbuild.include 267 268# For maximum performance (+ possibly random breakage, uncomment 269# the following) 270 271#MAKEFLAGS += -rR 272 273# Make variables (CC, etc...) 274 275AS = $(CROSS_COMPILE)as 276LD = $(CROSS_COMPILE)ld 277CC = $(CROSS_COMPILE)gcc 278CPP = $(CC) -E 279AR = $(CROSS_COMPILE)ar 280NM = $(CROSS_COMPILE)nm 281STRIP = $(CROSS_COMPILE)strip 282OBJCOPY = $(CROSS_COMPILE)objcopy 283OBJDUMP = $(CROSS_COMPILE)objdump 284AWK = awk 285GENKSYMS = scripts/genksyms/genksyms 286DEPMOD = /sbin/depmod 287KALLSYMS = scripts/kallsyms 288PERL = perl 289CHECK = sparse 290 291CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 292MODFLAGS = -DMODULE 293CFLAGS_MODULE = $(MODFLAGS) 294AFLAGS_MODULE = $(MODFLAGS) 295LDFLAGS_MODULE = -r 296CFLAGS_KERNEL = 297AFLAGS_KERNEL = 298 299 300# Use LINUXINCLUDE when you must reference the include/ directory. 301# Needed to be compatible with the O= option 302LINUXINCLUDE := -Iinclude \ 303 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 304 -include include/linux/autoconf.h 305 306CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 307 308CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 309 -fno-strict-aliasing -fno-common \ 310 -ffreestanding 311AFLAGS := -D__ASSEMBLY__ 312 313# Read KERNELRELEASE from .kernelrelease (if it exists) 314KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) 315KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 316 317export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ 318 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 319 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 320 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 321 322export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 323export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 324export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 325 326# When compiling out-of-tree modules, put MODVERDIR in the module 327# tree rather than in the kernel tree. The kernel tree might 328# even be read-only. 329export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 330 331# Files to ignore in find ... statements 332 333RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 334export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 335 336# =========================================================================== 337# Rules shared between *config targets and build targets 338 339# Basic helpers built in scripts/ 340PHONY += scripts_basic 341scripts_basic: 342 $(Q)$(MAKE) $(build)=scripts/basic 343 344# To avoid any implicit rule to kick in, define an empty command. 345scripts/basic/%: scripts_basic ; 346 347PHONY += outputmakefile 348# outputmakefile generate a Makefile to be placed in output directory, if 349# using a seperate output directory. This allows convinient use 350# of make in output directory 351outputmakefile: 352 $(Q)if test ! $(srctree) -ef $(objtree); then \ 353 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 354 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 355 > $(objtree)/Makefile; \ 356 echo ' GEN $(objtree)/Makefile'; \ 357 fi 358 359# To make sure we do not include .config for any of the *config targets 360# catch them early, and hand them over to scripts/kconfig/Makefile 361# It is allowed to specify more targets when calling make, including 362# mixing *config targets and build targets. 363# For example 'make oldconfig all'. 364# Detect when mixed targets is specified, and make a second invocation 365# of make so .config is not included in this case either (for *config). 366 367no-dot-config-targets := clean mrproper distclean \ 368 cscope TAGS tags help %docs check% 369 370config-targets := 0 371mixed-targets := 0 372dot-config := 1 373 374ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 375 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 376 dot-config := 0 377 endif 378endif 379 380ifeq ($(KBUILD_EXTMOD),) 381 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 382 config-targets := 1 383 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 384 mixed-targets := 1 385 endif 386 endif 387endif 388 389ifeq ($(mixed-targets),1) 390# =========================================================================== 391# We're called with mixed targets (*config and build targets). 392# Handle them one by one. 393 394%:: FORCE 395 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 396 397else 398ifeq ($(config-targets),1) 399# =========================================================================== 400# *config targets only - make sure prerequisites are updated, and descend 401# in scripts/kconfig to make the *config target 402 403# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 404# KBUILD_DEFCONFIG may point out an alternative default configuration 405# used for 'make defconfig' 406include $(srctree)/arch/$(ARCH)/Makefile 407export KBUILD_DEFCONFIG 408 409config %config: scripts_basic outputmakefile FORCE 410 $(Q)mkdir -p include/linux 411 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 412 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease 413 414else 415# =========================================================================== 416# Build targets only - this includes vmlinux, arch specific targets, clean 417# targets and others. In general all targets except *config targets. 418 419ifeq ($(KBUILD_EXTMOD),) 420# Additional helpers built in scripts/ 421# Carefully list dependencies so we do not try to build scripts twice 422# in parrallel 423PHONY += scripts 424scripts: scripts_basic include/config/MARKER 425 $(Q)$(MAKE) $(build)=$(@) 426 427scripts_basic: include/linux/autoconf.h 428 429# Objects we will link into vmlinux / subdirs we need to visit 430init-y := init/ 431drivers-y := drivers/ sound/ 432net-y := net/ 433libs-y := lib/ 434core-y := usr/ 435endif # KBUILD_EXTMOD 436 437ifeq ($(dot-config),1) 438# In this section, we need .config 439 440# Read in dependencies to all Kconfig* files, make sure to run 441# oldconfig if changes are detected. 442-include .kconfig.d 443 444include .config 445 446# If .config needs to be updated, it will be done via the dependency 447# that autoconf has on .config. 448# To avoid any implicit rule to kick in, define an empty command 449.config .kconfig.d: ; 450 451# If .config is newer than include/linux/autoconf.h, someone tinkered 452# with it and forgot to run make oldconfig. 453# If kconfig.d is missing then we are probarly in a cleaned tree so 454# we execute the config step to be sure to catch updated Kconfig files 455include/linux/autoconf.h: .kconfig.d .config 456 $(Q)mkdir -p include/linux 457 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 458else 459# Dummy target needed, because used as prerequisite 460include/linux/autoconf.h: ; 461endif 462 463# The all: target is the default when no target is given on the 464# command line. 465# This allow a user to issue only 'make' to build a kernel including modules 466# Defaults vmlinux but it is usually overriden in the arch makefile 467all: vmlinux 468 469ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 470CFLAGS += -Os 471else 472CFLAGS += -O2 473endif 474 475#Add align options if CONFIG_CC_* is not equal to 0 476add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) 477CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) 478CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) 479CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) 480CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) 481 482ifdef CONFIG_FRAME_POINTER 483CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 484else 485CFLAGS += -fomit-frame-pointer 486endif 487 488ifdef CONFIG_DEBUG_INFO 489CFLAGS += -g 490endif 491 492include $(srctree)/arch/$(ARCH)/Makefile 493 494# arch Makefile may override CC so keep this after arch Makefile is included 495NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 496CHECKFLAGS += $(NOSTDINC_FLAGS) 497 498# warn about C99 declaration after statement 499CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 500 501# disable pointer signedness warnings in gcc 4.0 502CFLAGS += $(call cc-option,-Wno-pointer-sign,) 503 504# Default kernel image to build when no specific target is given. 505# KBUILD_IMAGE may be overruled on the commandline or 506# set in the environment 507# Also any assignments in arch/$(ARCH)/Makefile take precedence over 508# this default value 509export KBUILD_IMAGE ?= vmlinux 510 511# 512# INSTALL_PATH specifies where to place the updated kernel and system map 513# images. Default is /boot, but you can set it to other values 514export INSTALL_PATH ?= /boot 515 516# 517# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 518# relocations required by build roots. This is not defined in the 519# makefile but the arguement can be passed to make if needed. 520# 521 522MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 523export MODLIB 524 525 526ifeq ($(KBUILD_EXTMOD),) 527core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 528 529vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 530 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 531 $(net-y) $(net-m) $(libs-y) $(libs-m))) 532 533vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 534 $(init-n) $(init-) \ 535 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 536 $(net-n) $(net-) $(libs-n) $(libs-)))) 537 538init-y := $(patsubst %/, %/built-in.o, $(init-y)) 539core-y := $(patsubst %/, %/built-in.o, $(core-y)) 540drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 541net-y := $(patsubst %/, %/built-in.o, $(net-y)) 542libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 543libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 544libs-y := $(libs-y1) $(libs-y2) 545 546# Build vmlinux 547# --------------------------------------------------------------------------- 548# vmlinux is build from the objects selected by $(vmlinux-init) and 549# $(vmlinux-main). Most are built-in.o files from top-level directories 550# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 551# Ordering when linking is important, and $(vmlinux-init) must be first. 552# 553# vmlinux 554# ^ 555# | 556# +-< $(vmlinux-init) 557# | +--< init/version.o + more 558# | 559# +--< $(vmlinux-main) 560# | +--< driver/built-in.o mm/built-in.o + more 561# | 562# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 563# 564# vmlinux version (uname -v) cannot be updated during normal 565# descending-into-subdirs phase since we do not yet know if we need to 566# update vmlinux. 567# Therefore this step is delayed until just before final link of vmlinux - 568# except in the kallsyms case where it is done just before adding the 569# symbols to the kernel. 570# 571# System.map is generated to document addresses of all kernel symbols 572 573vmlinux-init := $(head-y) $(init-y) 574vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 575vmlinux-all := $(vmlinux-init) $(vmlinux-main) 576vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 577 578# Rule to link vmlinux - also used during CONFIG_KALLSYMS 579# May be overridden by arch/$(ARCH)/Makefile 580quiet_cmd_vmlinux__ ?= LD $@ 581 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 582 -T $(vmlinux-lds) $(vmlinux-init) \ 583 --start-group $(vmlinux-main) --end-group \ 584 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 585 586# Generate new vmlinux version 587quiet_cmd_vmlinux_version = GEN .version 588 cmd_vmlinux_version = set -e; \ 589 if [ ! -r .version ]; then \ 590 rm -f .version; \ 591 echo 1 >.version; \ 592 else \ 593 mv .version .old_version; \ 594 expr 0$$(cat .old_version) + 1 >.version; \ 595 fi; \ 596 $(MAKE) $(build)=init 597 598# Generate System.map 599quiet_cmd_sysmap = SYSMAP 600 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 601 602# Link of vmlinux 603# If CONFIG_KALLSYMS is set .version is already updated 604# Generate System.map and verify that the content is consistent 605# Use + in front of the vmlinux_version rule to silent warning with make -j2 606# First command is ':' to allow us to use + in front of the rule 607define rule_vmlinux__ 608 : 609 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 610 611 $(call cmd,vmlinux__) 612 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 613 614 $(Q)$(if $($(quiet)cmd_sysmap), \ 615 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 616 $(cmd_sysmap) $@ System.map; \ 617 if [ $$? -ne 0 ]; then \ 618 rm -f $@; \ 619 /bin/false; \ 620 fi; 621 $(verify_kallsyms) 622endef 623 624 625ifdef CONFIG_KALLSYMS 626# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 627# It's a three stage process: 628# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 629# empty 630# Running kallsyms on that gives us .tmp_kallsyms1.o with 631# the right size - vmlinux version (uname -v) is updated during this step 632# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 633# but due to the added section, some addresses have shifted. 634# From here, we generate a correct .tmp_kallsyms2.o 635# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 636# o Verify that the System.map from vmlinux matches the map from 637# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 638# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 639# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 640# temporary bypass to allow the kernel to be built while the 641# maintainers work out what went wrong with kallsyms. 642 643ifdef CONFIG_KALLSYMS_EXTRA_PASS 644last_kallsyms := 3 645else 646last_kallsyms := 2 647endif 648 649kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 650 651define verify_kallsyms 652 $(Q)$(if $($(quiet)cmd_sysmap), \ 653 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 654 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 655 $(Q)cmp -s System.map .tmp_System.map || \ 656 (echo Inconsistent kallsyms data; \ 657 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 658 rm .tmp_kallsyms* ; /bin/false ) 659endef 660 661# Update vmlinux version before link 662# Use + in front of this rule to silent warning about make -j1 663# First command is ':' to allow us to use + in front of this rule 664cmd_ksym_ld = $(cmd_vmlinux__) 665define rule_ksym_ld 666 : 667 +$(call cmd,vmlinux_version) 668 $(call cmd,vmlinux__) 669 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 670endef 671 672# Generate .S file with all kernel symbols 673quiet_cmd_kallsyms = KSYM $@ 674 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 675 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 676 677.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 678 $(call if_changed_dep,as_o_S) 679 680.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 681 $(call cmd,kallsyms) 682 683# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 684.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 685 $(call if_changed_rule,ksym_ld) 686 687.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 688 $(call if_changed,vmlinux__) 689 690.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 691 $(call if_changed,vmlinux__) 692 693# Needs to visit scripts/ before $(KALLSYMS) can be used. 694$(KALLSYMS): scripts ; 695 696# Generate some data for debugging strange kallsyms problems 697debug_kallsyms: .tmp_map$(last_kallsyms) 698 699.tmp_map%: .tmp_vmlinux% FORCE 700 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 701 702.tmp_map3: .tmp_map2 703 704.tmp_map2: .tmp_map1 705 706endif # ifdef CONFIG_KALLSYMS 707 708# vmlinux image - including updated kernel symbols 709vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 710 $(call if_changed_rule,vmlinux__) 711 $(Q)rm -f .old_version 712 713# The actual objects are generated when descending, 714# make sure no implicit rule kicks in 715$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 716 717# Handle descending into subdirectories listed in $(vmlinux-dirs) 718# Preset locale variables to speed up the build process. Limit locale 719# tweaks to this spot to avoid wrong language settings when running 720# make menuconfig etc. 721# Error messages still appears in the original language 722 723PHONY += $(vmlinux-dirs) 724$(vmlinux-dirs): prepare scripts 725 $(Q)$(MAKE) $(build)=$@ 726 727# Build the kernel release string 728# The KERNELRELEASE is stored in a file named .kernelrelease 729# to be used when executing for example make install or make modules_install 730# 731# Take the contents of any files called localversion* and the config 732# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 733# LOCALVERSION from the command line override all of this 734 735nullstring := 736space := $(nullstring) # end of line 737 738___localver = $(objtree)/localversion* $(srctree)/localversion* 739__localver = $(sort $(wildcard $(___localver))) 740# skip backup files (containing '~') 741_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 742 743localver = $(subst $(space),, \ 744 $(shell cat /dev/null $(_localver)) \ 745 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 746 747# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 748# and if the SCM is know a tag from the SCM is appended. 749# The appended tag is determinded by the SCM used. 750# 751# Currently, only git is supported. 752# Other SCMs can edit scripts/setlocalversion and add the appropriate 753# checks as needed. 754ifdef CONFIG_LOCALVERSION_AUTO 755 _localver-auto = $(shell $(CONFIG_SHELL) \ 756 $(srctree)/scripts/setlocalversion $(srctree)) 757 localver-auto = $(LOCALVERSION)$(_localver-auto) 758endif 759 760localver-full = $(localver)$(localver-auto) 761 762# Store (new) KERNELRELASE string in .kernelrelease 763kernelrelease = $(KERNELVERSION)$(localver-full) 764.kernelrelease: FORCE 765 $(Q)rm -f $@ 766 $(Q)echo $(kernelrelease) > $@ 767 768 769# Things we need to do before we recursively start building the kernel 770# or the modules are listed in "prepare". 771# A multi level approach is used. prepareN is processed before prepareN-1. 772# archprepare is used in arch Makefiles and when processed asm symlink, 773# version.h and scripts_basic is processed / created. 774 775# Listed in dependency order 776PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 777 778# prepare-all is deprecated, use prepare as valid replacement 779PHONY += prepare-all 780 781# prepare3 is used to check if we are building in a separate output directory, 782# and if so do: 783# 1) Check that make has not been executed in the kernel src $(srctree) 784# 2) Create the include2 directory, used for the second asm symlink 785prepare3: .kernelrelease 786ifneq ($(KBUILD_SRC),) 787 @echo ' Using $(srctree) as source for kernel' 788 $(Q)if [ -f $(srctree)/.config ]; then \ 789 echo " $(srctree) is not clean, please run 'make mrproper'";\ 790 echo " in the '$(srctree)' directory.";\ 791 /bin/false; \ 792 fi; 793 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 794 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 795endif 796 797# prepare2 creates a makefile if using a separate output directory 798prepare2: prepare3 outputmakefile 799 800prepare1: prepare2 include/linux/version.h include/asm \ 801 include/config/MARKER 802ifneq ($(KBUILD_MODULES),) 803 $(Q)rm -rf $(MODVERDIR) 804 $(Q)mkdir -p $(MODVERDIR) 805endif 806 807archprepare: prepare1 scripts_basic 808 809prepare0: archprepare FORCE 810 $(Q)$(MAKE) $(build)=. 811 812# All the preparing.. 813prepare prepare-all: prepare0 814 815# Leave this as default for preprocessing vmlinux.lds.S, which is now 816# done in arch/$(ARCH)/kernel/Makefile 817 818export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 819 820# FIXME: The asm symlink changes when $(ARCH) changes. That's 821# hard to detect, but I suppose "make mrproper" is a good idea 822# before switching between archs anyway. 823 824include/asm: 825 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 826 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 827 @ln -fsn asm-$(ARCH) $@ 828 829# Split autoconf.h into include/linux/config/* 830 831include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h 832 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 833 @scripts/basic/split-include include/linux/autoconf.h include/config 834 @touch $@ 835 836# Generate some files 837# --------------------------------------------------------------------------- 838 839# KERNELRELEASE can change from a few different places, meaning version.h 840# needs to be updated, so this check is forced on all builds 841 842uts_len := 64 843 844define filechk_version.h 845 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 846 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 847 exit 1; \ 848 fi; \ 849 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 850 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 851 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 852 ) 853endef 854 855include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE 856 $(call filechk,version.h) 857 858# --------------------------------------------------------------------------- 859 860PHONY += depend dep 861depend dep: 862 @echo '*** Warning: make $@ is unnecessary now.' 863 864# --------------------------------------------------------------------------- 865# Modules 866 867ifdef CONFIG_MODULES 868 869# By default, build modules as well 870 871all: modules 872 873# Build modules 874 875PHONY += modules 876modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 877 @echo ' Building modules, stage 2.'; 878 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 879 880 881# Target to prepare building external modules 882PHONY += modules_prepare 883modules_prepare: prepare scripts 884 885# Target to install modules 886PHONY += modules_install 887modules_install: _modinst_ _modinst_post 888 889PHONY += _modinst_ 890_modinst_: 891 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 892 echo "Warning: you may need to install module-init-tools"; \ 893 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 894 sleep 1; \ 895 fi 896 @rm -rf $(MODLIB)/kernel 897 @rm -f $(MODLIB)/source 898 @mkdir -p $(MODLIB)/kernel 899 @ln -s $(srctree) $(MODLIB)/source 900 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 901 rm -f $(MODLIB)/build ; \ 902 ln -s $(objtree) $(MODLIB)/build ; \ 903 fi 904 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 905 906# If System.map exists, run depmod. This deliberately does not have a 907# dependency on System.map since that would run the dependency tree on 908# vmlinux. This depmod is only for convenience to give the initial 909# boot a modules.dep even before / is mounted read-write. However the 910# boot script depmod is the master version. 911ifeq "$(strip $(INSTALL_MOD_PATH))" "" 912depmod_opts := 913else 914depmod_opts := -b $(INSTALL_MOD_PATH) -r 915endif 916PHONY += _modinst_post 917_modinst_post: _modinst_ 918 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 919 920else # CONFIG_MODULES 921 922# Modules not configured 923# --------------------------------------------------------------------------- 924 925modules modules_install: FORCE 926 @echo 927 @echo "The present kernel configuration has modules disabled." 928 @echo "Type 'make config' and enable loadable module support." 929 @echo "Then build a kernel with module support enabled." 930 @echo 931 @exit 1 932 933endif # CONFIG_MODULES 934 935### 936# Cleaning is done on three levels. 937# make clean Delete most generated files 938# Leave enough to build external modules 939# make mrproper Delete the current configuration, and all generated files 940# make distclean Remove editor backup files, patch leftover files and the like 941 942# Directories & files removed with 'make clean' 943CLEAN_DIRS += $(MODVERDIR) 944CLEAN_FILES += vmlinux System.map \ 945 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 946 947# Directories & files removed with 'make mrproper' 948MRPROPER_DIRS += include/config include2 949MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 950 include/linux/autoconf.h include/linux/version.h \ 951 .kernelrelease Module.symvers tags TAGS cscope* 952 953# clean - Delete most, but leave enough to build external modules 954# 955clean: rm-dirs := $(CLEAN_DIRS) 956clean: rm-files := $(CLEAN_FILES) 957clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 958 959PHONY += $(clean-dirs) clean archclean 960$(clean-dirs): 961 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 962 963clean: archclean $(clean-dirs) 964 $(call cmd,rmdirs) 965 $(call cmd,rmfiles) 966 @find . $(RCS_FIND_IGNORE) \ 967 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 968 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 969 -type f -print | xargs rm -f 970 971# mrproper - Delete all generated files, including .config 972# 973mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 974mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 975mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 976 977PHONY += $(mrproper-dirs) mrproper archmrproper 978$(mrproper-dirs): 979 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 980 981mrproper: clean archmrproper $(mrproper-dirs) 982 $(call cmd,rmdirs) 983 $(call cmd,rmfiles) 984 985# distclean 986# 987PHONY += distclean 988 989distclean: mrproper 990 @find $(srctree) $(RCS_FIND_IGNORE) \ 991 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 992 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 993 -o -name '.*.rej' -o -size 0 \ 994 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 995 -type f -print | xargs rm -f 996 997 998# Packaging of the kernel to various formats 999# --------------------------------------------------------------------------- 1000# rpm target kept for backward compatibility 1001package-dir := $(srctree)/scripts/package 1002 1003PHONY += %-pkg rpm 1004 1005%pkg: FORCE 1006 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1007rpm: FORCE 1008 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1009 1010 1011# Brief documentation of the typical targets used 1012# --------------------------------------------------------------------------- 1013 1014boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1015boards := $(notdir $(boards)) 1016 1017help: 1018 @echo 'Cleaning targets:' 1019 @echo ' clean - remove most generated files but keep the config' 1020 @echo ' mrproper - remove all generated files + config + various backup files' 1021 @echo '' 1022 @echo 'Configuration targets:' 1023 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1024 @echo '' 1025 @echo 'Other generic targets:' 1026 @echo ' all - Build all targets marked with [*]' 1027 @echo '* vmlinux - Build the bare kernel' 1028 @echo '* modules - Build all modules' 1029 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1030 @echo ' dir/ - Build all files in dir and below' 1031 @echo ' dir/file.[ois] - Build specified target only' 1032 @echo ' dir/file.ko - Build module including final link' 1033 @echo ' rpm - Build a kernel as an RPM package' 1034 @echo ' tags/TAGS - Generate tags file for editors' 1035 @echo ' cscope - Generate cscope index' 1036 @echo ' kernelrelease - Output the release version string' 1037 @echo ' kernelversion - Output the version stored in Makefile' 1038 @echo '' 1039 @echo 'Static analysers' 1040 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1041 @echo ' and init sections from non-init sections' 1042 @echo ' checkstack - Generate a list of stack hogs' 1043 @echo ' namespacecheck - Name space analysis on compiled kernel' 1044 @echo '' 1045 @echo 'Kernel packaging:' 1046 @$(MAKE) -f $(package-dir)/Makefile help 1047 @echo '' 1048 @echo 'Documentation targets:' 1049 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1050 @echo '' 1051 @echo 'Architecture specific targets ($(ARCH)):' 1052 @$(if $(archhelp),$(archhelp),\ 1053 echo ' No architecture specific help defined for $(ARCH)') 1054 @echo '' 1055 @$(if $(boards), \ 1056 $(foreach b, $(boards), \ 1057 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1058 echo '') 1059 1060 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1061 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1062 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1063 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1064 @echo '' 1065 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1066 @echo 'For further info see the ./README file' 1067 1068 1069# Documentation targets 1070# --------------------------------------------------------------------------- 1071%docs: scripts_basic FORCE 1072 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1073 1074else # KBUILD_EXTMOD 1075 1076### 1077# External module support. 1078# When building external modules the kernel used as basis is considered 1079# read-only, and no consistency checks are made and the make 1080# system is not used on the basis kernel. If updates are required 1081# in the basis kernel ordinary make commands (without M=...) must 1082# be used. 1083# 1084# The following are the only valid targets when building external 1085# modules. 1086# make M=dir clean Delete all automatically generated files 1087# make M=dir modules Make all modules in specified dir 1088# make M=dir Same as 'make M=dir modules' 1089# make M=dir modules_install 1090# Install the modules build in the module directory 1091# Assumes install directory is already created 1092 1093# We are always building modules 1094KBUILD_MODULES := 1 1095PHONY += crmodverdir 1096crmodverdir: 1097 $(Q)rm -rf $(MODVERDIR) 1098 $(Q)mkdir -p $(MODVERDIR) 1099 1100PHONY += $(objtree)/Module.symvers 1101$(objtree)/Module.symvers: 1102 @test -e $(objtree)/Module.symvers || ( \ 1103 echo; \ 1104 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1105 echo " is missing; modules will have no dependencies and modversions."; \ 1106 echo ) 1107 1108module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1109PHONY += $(module-dirs) modules 1110$(module-dirs): crmodverdir $(objtree)/Module.symvers 1111 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1112 1113modules: $(module-dirs) 1114 @echo ' Building modules, stage 2.'; 1115 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1116 1117PHONY += modules_install 1118modules_install: _emodinst_ _emodinst_post 1119 1120install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1121PHONY += _emodinst_ 1122_emodinst_: 1123 $(Q)rm -rf $(MODLIB)/$(install-dir) 1124 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1125 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1126 1127# Run depmod only is we have System.map and depmod is executable 1128quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1129 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1130 $(DEPMOD) -ae -F System.map \ 1131 $(if $(strip $(INSTALL_MOD_PATH)), \ 1132 -b $(INSTALL_MOD_PATH) -r) \ 1133 $(KERNELRELEASE); \ 1134 fi 1135 1136PHONY += _emodinst_post 1137_emodinst_post: _emodinst_ 1138 $(call cmd,depmod) 1139 1140clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1141 1142PHONY += $(clean-dirs) clean 1143$(clean-dirs): 1144 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1145 1146clean: rm-dirs := $(MODVERDIR) 1147clean: $(clean-dirs) 1148 $(call cmd,rmdirs) 1149 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1150 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1151 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1152 -type f -print | xargs rm -f 1153 1154help: 1155 @echo ' Building external modules.' 1156 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1157 @echo '' 1158 @echo ' modules - default target, build the module(s)' 1159 @echo ' modules_install - install the module' 1160 @echo ' clean - remove generated files in module directory only' 1161 @echo '' 1162 1163# Dummies... 1164PHONY += prepare scripts 1165prepare: ; 1166scripts: ; 1167endif # KBUILD_EXTMOD 1168 1169# Generate tags for editors 1170# --------------------------------------------------------------------------- 1171 1172#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1173#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1174#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1175 1176ifeq ($(src),$(obj)) 1177__srctree = 1178else 1179__srctree = $(srctree)/ 1180endif 1181 1182ifeq ($(ALLSOURCE_ARCHS),) 1183ifeq ($(ARCH),um) 1184ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1185else 1186ALLINCLUDE_ARCHS := $(ARCH) 1187endif 1188else 1189#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. 1190ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1191endif 1192 1193ALLSOURCE_ARCHS := $(ARCH) 1194 1195define all-sources 1196 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1197 \( -name include -o -name arch \) -prune -o \ 1198 -name '*.[chS]' -print; \ 1199 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1200 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1201 -name '*.[chS]' -print; \ 1202 done ; \ 1203 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1204 -name '*.[chS]' -print; \ 1205 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1206 \( -name config -o -name 'asm-*' \) -prune \ 1207 -o -name '*.[chS]' -print; \ 1208 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1209 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1210 -name '*.[chS]' -print; \ 1211 done ; \ 1212 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1213 -name '*.[chS]' -print ) 1214endef 1215 1216quiet_cmd_cscope-file = FILELST cscope.files 1217 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1218 1219quiet_cmd_cscope = MAKE cscope.out 1220 cmd_cscope = cscope -b 1221 1222cscope: FORCE 1223 $(call cmd,cscope-file) 1224 $(call cmd,cscope) 1225 1226quiet_cmd_TAGS = MAKE $@ 1227define cmd_TAGS 1228 rm -f $@; \ 1229 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1230 echo "-I __initdata,__exitdata,__acquires,__releases \ 1231 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1232 --extra=+f --c-kinds=+px"`; \ 1233 $(all-sources) | xargs etags $$ETAGSF -a 1234endef 1235 1236TAGS: FORCE 1237 $(call cmd,TAGS) 1238 1239 1240quiet_cmd_tags = MAKE $@ 1241define cmd_tags 1242 rm -f $@; \ 1243 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1244 echo "-I __initdata,__exitdata,__acquires,__releases \ 1245 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1246 --extra=+f --c-kinds=+px"`; \ 1247 $(all-sources) | xargs ctags $$CTAGSF -a 1248endef 1249 1250tags: FORCE 1251 $(call cmd,tags) 1252 1253 1254# Scripts to check various things for consistency 1255# --------------------------------------------------------------------------- 1256 1257includecheck: 1258 find * $(RCS_FIND_IGNORE) \ 1259 -name '*.[hcS]' -type f -print | sort \ 1260 | xargs $(PERL) -w scripts/checkincludes.pl 1261 1262versioncheck: 1263 find * $(RCS_FIND_IGNORE) \ 1264 -name '*.[hcS]' -type f -print | sort \ 1265 | xargs $(PERL) -w scripts/checkversion.pl 1266 1267buildcheck: 1268 $(PERL) $(srctree)/scripts/reference_discarded.pl 1269 $(PERL) $(srctree)/scripts/reference_init.pl 1270 1271namespacecheck: 1272 $(PERL) $(srctree)/scripts/namespace.pl 1273 1274endif #ifeq ($(config-targets),1) 1275endif #ifeq ($(mixed-targets),1) 1276 1277PHONY += checkstack 1278checkstack: 1279 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1280 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1281 1282kernelrelease: 1283 $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ 1284 $(error kernelrelease not valid - run 'make *config' to update it)) 1285kernelversion: 1286 @echo $(KERNELVERSION) 1287 1288# Single targets 1289# --------------------------------------------------------------------------- 1290# The directory part is taken from first prerequisite, so this 1291# works even with external modules 1292%.s: %.c prepare scripts FORCE 1293 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1294%.i: %.c prepare scripts FORCE 1295 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1296%.o: %.c prepare scripts FORCE 1297 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1298%.lst: %.c prepare scripts FORCE 1299 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1300%.s: %.S prepare scripts FORCE 1301 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1302%.o: %.S prepare scripts FORCE 1303 $(Q)$(MAKE) $(build)=$(dir $<) $(dir $<)$(notdir $@) 1304 1305# For external modules we shall include any directory of the target, 1306# but usual case there is no directory part. 1307# make M=`pwd` module.o => $(dir $@)=./ 1308# make M=`pwd` foo/module.o => $(dir $@)=foo/ 1309# make M=`pwd` / => $(dir $@)=/ 1310 1311ifeq ($(KBUILD_EXTMOD),) 1312 target-dir = $(@D) 1313else 1314 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1315 target-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1316endif 1317 1318/ %/: scripts prepare FORCE 1319 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1320 $(build)=$(target-dir) 1321%.ko: scripts FORCE 1322 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1323 $(build)=$(target-dir) $(@:.ko=.o) 1324 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1325 1326# FIXME Should go into a make.lib or something 1327# =========================================================================== 1328 1329quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1330 cmd_rmdirs = rm -rf $(rm-dirs) 1331 1332quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1333 cmd_rmfiles = rm -f $(rm-files) 1334 1335 1336a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1337 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1338 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1339 1340quiet_cmd_as_o_S = AS $@ 1341cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1342 1343# read all saved command lines 1344 1345targets := $(wildcard $(sort $(targets))) 1346cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1347 1348ifneq ($(cmd_files),) 1349 $(cmd_files): ; # Do not try to update included dependency files 1350 include $(cmd_files) 1351endif 1352 1353# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1354# Usage: 1355# $(Q)$(MAKE) $(clean)=dir 1356clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1357 1358endif # skip-makefile 1359 1360PHONY += FORCE 1361FORCE: 1362 1363 1364# Declare the contents of the .PHONY variable as phony. We keep that 1365# information in a variable se we can use it in if_changed and friends. 1366.PHONY: $(PHONY) 1367