1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 14 4EXTRAVERSION = 5NAME=Affluent Albatross 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 := $(O) 94 endif 95endif 96 97# That's our default target when none is given on the command line 98.PHONY: _all 99_all: 100 101ifneq ($(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)) 108 109.PHONY: $(MAKECMDGOALS) 110 111$(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 126.PHONY: 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) 141 142export srctree objtree VPATH TOPDIR 143 144nullstring := 145space := $(nullstring) # end of line 146 147# Take the contents of any files called localversion* and the config 148# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. Be 149# careful not to include files twice if building in the source 150# directory. LOCALVERSION from the command line override all of this 151 152localver := $(objtree)/localversion* $(srctree)/localversion* 153localver := $(sort $(wildcard $(localver))) 154# skip backup files (containing '~') 155localver := $(foreach f, $(localver), $(if $(findstring ~, $(f)),,$(f))) 156 157LOCALVERSION = $(subst $(space),, \ 158 $(shell cat /dev/null $(localver)) \ 159 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 160 161KERNELRELEASE=$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)$(LOCALVERSION) 162 163# SUBARCH tells the usermode build what the underlying arch is. That is set 164# first, and if a usermode build is happening, the "ARCH=um" on the command 165# line overrides the setting of ARCH below. If a native build is happening, 166# then ARCH is assigned, getting whatever value it gets normally, and 167# SUBARCH is subsequently ignored. 168 169SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 170 -e s/arm.*/arm/ -e s/sa110/arm/ \ 171 -e s/s390x/s390/ -e s/parisc64/parisc/ ) 172 173# Cross compiling and selecting different set of gcc/bin-utils 174# --------------------------------------------------------------------------- 175# 176# When performing cross compilation for other architectures ARCH shall be set 177# to the target architecture. (See arch/* for the possibilities). 178# ARCH can be set during invocation of make: 179# make ARCH=ia64 180# Another way is to have ARCH set in the environment. 181# The default ARCH is the host where make is executed. 182 183# CROSS_COMPILE specify the prefix used for all executables used 184# during compilation. Only gcc and related bin-utils executables 185# are prefixed with $(CROSS_COMPILE). 186# CROSS_COMPILE can be set on the command line 187# make CROSS_COMPILE=ia64-linux- 188# Alternatively CROSS_COMPILE can be set in the environment. 189# Default value for CROSS_COMPILE is not to prefix executables 190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 191 192ARCH ?= $(SUBARCH) 193CROSS_COMPILE ?= 194 195# Architecture as present in compile.h 196UTS_MACHINE := $(ARCH) 197 198# SHELL used by kbuild 199CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 200 else if [ -x /bin/bash ]; then echo /bin/bash; \ 201 else echo sh; fi ; fi) 202 203HOSTCC = gcc 204HOSTCXX = g++ 205HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 206HOSTCXXFLAGS = -O2 207 208# Decide whether to build built-in, modular, or both. 209# Normally, just do built-in. 210 211KBUILD_MODULES := 212KBUILD_BUILTIN := 1 213 214# If we have only "make modules", don't compile built-in objects. 215# When we're building modules with modversions, we need to consider 216# the built-in objects during the descend as well, in order to 217# make sure the checksums are uptodate before we record them. 218 219ifeq ($(MAKECMDGOALS),modules) 220 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 221endif 222 223# If we have "make <whatever> modules", compile modules 224# in addition to whatever we do anyway. 225# Just "make" or "make all" shall build modules as well 226 227ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 228 KBUILD_MODULES := 1 229endif 230 231ifeq ($(MAKECMDGOALS),) 232 KBUILD_MODULES := 1 233endif 234 235export KBUILD_MODULES KBUILD_BUILTIN 236export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 237 238# Beautify output 239# --------------------------------------------------------------------------- 240# 241# Normally, we echo the whole command before executing it. By making 242# that echo $($(quiet)$(cmd)), we now have the possibility to set 243# $(quiet) to choose other forms of output instead, e.g. 244# 245# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 246# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 247# 248# If $(quiet) is empty, the whole command will be printed. 249# If it is set to "quiet_", only the short version will be printed. 250# If it is set to "silent_", nothing wil be printed at all, since 251# the variable $(silent_cmd_cc_o_c) doesn't exist. 252# 253# A simple variant is to prefix commands with $(Q) - that's usefull 254# for commands that shall be hidden in non-verbose mode. 255# 256# $(Q)ln $@ :< 257# 258# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 259# If KBUILD_VERBOSE equals 1 then the above command is displayed. 260 261ifeq ($(KBUILD_VERBOSE),1) 262 quiet = 263 Q = 264else 265 quiet=quiet_ 266 Q = @ 267endif 268 269# If the user is running make -s (silent mode), suppress echoing of 270# commands 271 272ifneq ($(findstring s,$(MAKEFLAGS)),) 273 quiet=silent_ 274endif 275 276export quiet Q KBUILD_VERBOSE 277 278###### 279# cc support functions to be used (only) in arch/$(ARCH)/Makefile 280# See documentation in Documentation/kbuild/makefiles.txt 281 282# cc-option 283# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) 284 285cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 286 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 287 288# For backward compatibility 289check_gcc = $(warning check_gcc is deprecated - use cc-option) \ 290 $(call cc-option, $(1),$(2)) 291 292# cc-option-yn 293# Usage: flag := $(call cc-option-yn, -march=winchip-c6) 294cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 295 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) 296 297# cc-option-align 298# Prefix align with either -falign or -malign 299cc-option-align = $(subst -functions=0,,\ 300 $(call cc-option,-falign-functions=0,-malign-functions=0)) 301 302# cc-version 303# Usage gcc-ver := $(call cc-version $(CC)) 304cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ 305 $(if $(1), $(1), $(CC))) 306 307 308# Look for make include files relative to root of kernel src 309MAKEFLAGS += --include-dir=$(srctree) 310 311# We need some generic definitions 312include $(srctree)/scripts/Kbuild.include 313 314# For maximum performance (+ possibly random breakage, uncomment 315# the following) 316 317#MAKEFLAGS += -rR 318 319# Make variables (CC, etc...) 320 321AS = $(CROSS_COMPILE)as 322LD = $(CROSS_COMPILE)ld 323CC = $(CROSS_COMPILE)gcc 324CPP = $(CC) -E 325AR = $(CROSS_COMPILE)ar 326NM = $(CROSS_COMPILE)nm 327STRIP = $(CROSS_COMPILE)strip 328OBJCOPY = $(CROSS_COMPILE)objcopy 329OBJDUMP = $(CROSS_COMPILE)objdump 330AWK = awk 331GENKSYMS = scripts/genksyms/genksyms 332DEPMOD = /sbin/depmod 333KALLSYMS = scripts/kallsyms 334PERL = perl 335CHECK = sparse 336 337CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 338MODFLAGS = -DMODULE 339CFLAGS_MODULE = $(MODFLAGS) 340AFLAGS_MODULE = $(MODFLAGS) 341LDFLAGS_MODULE = -r 342CFLAGS_KERNEL = 343AFLAGS_KERNEL = 344 345 346# Use LINUXINCLUDE when you must reference the include/ directory. 347# Needed to be compatible with the O= option 348LINUXINCLUDE := -Iinclude \ 349 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 350 -imacros include/linux/autoconf.h 351 352CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 353 354CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 355 -fno-strict-aliasing -fno-common \ 356 -ffreestanding 357AFLAGS := -D__ASSEMBLY__ 358 359export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION LOCALVERSION KERNELRELEASE \ 360 ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ 361 CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ 362 HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 363 364export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 365export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 366export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 367 368# When compiling out-of-tree modules, put MODVERDIR in the module 369# tree rather than in the kernel tree. The kernel tree might 370# even be read-only. 371export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 372 373# Files to ignore in find ... statements 374 375RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 376export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 377 378# =========================================================================== 379# Rules shared between *config targets and build targets 380 381# Basic helpers built in scripts/ 382.PHONY: scripts_basic 383scripts_basic: 384 $(Q)$(MAKE) $(build)=scripts/basic 385 386# To avoid any implicit rule to kick in, define an empty command. 387scripts/basic/%: scripts_basic ; 388 389.PHONY: outputmakefile 390# outputmakefile generate a Makefile to be placed in output directory, if 391# using a seperate output directory. This allows convinient use 392# of make in output directory 393outputmakefile: 394 $(Q)if test ! $(srctree) -ef $(objtree); then \ 395 $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 396 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ 397 > $(objtree)/Makefile; \ 398 echo ' GEN $(objtree)/Makefile'; \ 399 fi 400 401# To make sure we do not include .config for any of the *config targets 402# catch them early, and hand them over to scripts/kconfig/Makefile 403# It is allowed to specify more targets when calling make, including 404# mixing *config targets and build targets. 405# For example 'make oldconfig all'. 406# Detect when mixed targets is specified, and make a second invocation 407# of make so .config is not included in this case either (for *config). 408 409no-dot-config-targets := clean mrproper distclean \ 410 cscope TAGS tags help %docs check% 411 412config-targets := 0 413mixed-targets := 0 414dot-config := 1 415 416ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 417 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 418 dot-config := 0 419 endif 420endif 421 422ifeq ($(KBUILD_EXTMOD),) 423 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 424 config-targets := 1 425 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 426 mixed-targets := 1 427 endif 428 endif 429endif 430 431ifeq ($(mixed-targets),1) 432# =========================================================================== 433# We're called with mixed targets (*config and build targets). 434# Handle them one by one. 435 436%:: FORCE 437 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 438 439else 440ifeq ($(config-targets),1) 441# =========================================================================== 442# *config targets only - make sure prerequisites are updated, and descend 443# in scripts/kconfig to make the *config target 444 445# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 446# KBUILD_DEFCONFIG may point out an alternative default configuration 447# used for 'make defconfig' 448include $(srctree)/arch/$(ARCH)/Makefile 449export KBUILD_DEFCONFIG 450 451config %config: scripts_basic outputmakefile FORCE 452 $(Q)mkdir -p include/linux 453 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 454 455else 456# =========================================================================== 457# Build targets only - this includes vmlinux, arch specific targets, clean 458# targets and others. In general all targets except *config targets. 459 460ifeq ($(KBUILD_EXTMOD),) 461# Additional helpers built in scripts/ 462# Carefully list dependencies so we do not try to build scripts twice 463# in parrallel 464.PHONY: scripts 465scripts: scripts_basic include/config/MARKER 466 $(Q)$(MAKE) $(build)=$(@) 467 468scripts_basic: include/linux/autoconf.h 469 470# Objects we will link into vmlinux / subdirs we need to visit 471init-y := init/ 472drivers-y := drivers/ sound/ 473net-y := net/ 474libs-y := lib/ 475core-y := usr/ 476endif # KBUILD_EXTMOD 477 478ifeq ($(dot-config),1) 479# In this section, we need .config 480 481# Read in dependencies to all Kconfig* files, make sure to run 482# oldconfig if changes are detected. 483-include .config.cmd 484 485include .config 486 487# If .config needs to be updated, it will be done via the dependency 488# that autoconf has on .config. 489# To avoid any implicit rule to kick in, define an empty command 490.config: ; 491 492# If .config is newer than include/linux/autoconf.h, someone tinkered 493# with it and forgot to run make oldconfig 494include/linux/autoconf.h: .config 495 $(Q)mkdir -p include/linux 496 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 497else 498# Dummy target needed, because used as prerequisite 499include/linux/autoconf.h: ; 500endif 501 502# The all: target is the default when no target is given on the 503# command line. 504# This allow a user to issue only 'make' to build a kernel including modules 505# Defaults vmlinux but it is usually overriden in the arch makefile 506all: vmlinux 507 508ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 509CFLAGS += -Os 510else 511CFLAGS += -O2 512endif 513 514#Add align options if CONFIG_CC_* is not equal to 0 515add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) 516CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) 517CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) 518CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) 519CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) 520 521ifdef CONFIG_FRAME_POINTER 522CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 523else 524CFLAGS += -fomit-frame-pointer 525endif 526 527ifdef CONFIG_DEBUG_INFO 528CFLAGS += -g 529endif 530 531include $(srctree)/arch/$(ARCH)/Makefile 532 533# arch Makefile may override CC so keep this after arch Makefile is included 534NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 535CHECKFLAGS += $(NOSTDINC_FLAGS) 536 537# warn about C99 declaration after statement 538CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 539 540# disable pointer signedness warnings in gcc 4.0 541CFLAGS += $(call cc-option,-Wno-pointer-sign,) 542 543# Default kernel image to build when no specific target is given. 544# KBUILD_IMAGE may be overruled on the commandline or 545# set in the environment 546# Also any assignments in arch/$(ARCH)/Makefile take precedence over 547# this default value 548export KBUILD_IMAGE ?= vmlinux 549 550# 551# INSTALL_PATH specifies where to place the updated kernel and system map 552# images. Default is /boot, but you can set it to other values 553export INSTALL_PATH ?= /boot 554 555# If CONFIG_LOCALVERSION_AUTO is set, we automatically perform some tests 556# and try to determine if the current source tree is a release tree, of any sort, 557# or if is a pure development tree. 558# 559# A 'release tree' is any tree with a git TAG associated 560# with it. The primary goal of this is to make it safe for a native 561# git/CVS/SVN user to build a release tree (i.e, 2.6.9) and also to 562# continue developing against the current Linus tree, without having the Linus 563# tree overwrite the 2.6.9 tree when installed. 564# 565# Currently, only git is supported. 566# Other SCMs can edit scripts/setlocalversion and add the appropriate 567# checks as needed. 568 569 570ifdef CONFIG_LOCALVERSION_AUTO 571 localversion-auto := $(shell $(PERL) $(srctree)/scripts/setlocalversion $(srctree)) 572 LOCALVERSION := $(LOCALVERSION)$(localversion-auto) 573endif 574 575# 576# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 577# relocations required by build roots. This is not defined in the 578# makefile but the arguement can be passed to make if needed. 579# 580 581MODLIB := $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 582export MODLIB 583 584 585ifeq ($(KBUILD_EXTMOD),) 586core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ 587 588vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 589 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 590 $(net-y) $(net-m) $(libs-y) $(libs-m))) 591 592vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 593 $(init-n) $(init-) \ 594 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 595 $(net-n) $(net-) $(libs-n) $(libs-)))) 596 597init-y := $(patsubst %/, %/built-in.o, $(init-y)) 598core-y := $(patsubst %/, %/built-in.o, $(core-y)) 599drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 600net-y := $(patsubst %/, %/built-in.o, $(net-y)) 601libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 602libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 603libs-y := $(libs-y1) $(libs-y2) 604 605# Build vmlinux 606# --------------------------------------------------------------------------- 607# vmlinux is build from the objects selected by $(vmlinux-init) and 608# $(vmlinux-main). Most are built-in.o files from top-level directories 609# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 610# Ordering when linking is important, and $(vmlinux-init) must be first. 611# 612# vmlinux 613# ^ 614# | 615# +-< $(vmlinux-init) 616# | +--< init/version.o + more 617# | 618# +--< $(vmlinux-main) 619# | +--< driver/built-in.o mm/built-in.o + more 620# | 621# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 622# 623# vmlinux version (uname -v) cannot be updated during normal 624# descending-into-subdirs phase since we do not yet know if we need to 625# update vmlinux. 626# Therefore this step is delayed until just before final link of vmlinux - 627# except in the kallsyms case where it is done just before adding the 628# symbols to the kernel. 629# 630# System.map is generated to document addresses of all kernel symbols 631 632vmlinux-init := $(head-y) $(init-y) 633vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 634vmlinux-all := $(vmlinux-init) $(vmlinux-main) 635vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 636 637# Rule to link vmlinux - also used during CONFIG_KALLSYMS 638# May be overridden by arch/$(ARCH)/Makefile 639quiet_cmd_vmlinux__ ?= LD $@ 640 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 641 -T $(vmlinux-lds) $(vmlinux-init) \ 642 --start-group $(vmlinux-main) --end-group \ 643 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 644 645# Generate new vmlinux version 646quiet_cmd_vmlinux_version = GEN .version 647 cmd_vmlinux_version = set -e; \ 648 if [ ! -r .version ]; then \ 649 rm -f .version; \ 650 echo 1 >.version; \ 651 else \ 652 mv .version .old_version; \ 653 expr 0$$(cat .old_version) + 1 >.version; \ 654 fi; \ 655 $(MAKE) $(build)=init 656 657# Generate System.map 658quiet_cmd_sysmap = SYSMAP 659 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 660 661# Link of vmlinux 662# If CONFIG_KALLSYMS is set .version is already updated 663# Generate System.map and verify that the content is consistent 664# Use + in front of the vmlinux_version rule to silent warning with make -j2 665# First command is ':' to allow us to use + in front of the rule 666define rule_vmlinux__ 667 : 668 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 669 670 $(call cmd,vmlinux__) 671 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 672 673 $(Q)$(if $($(quiet)cmd_sysmap), \ 674 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 675 $(cmd_sysmap) $@ System.map; \ 676 if [ $$? -ne 0 ]; then \ 677 rm -f $@; \ 678 /bin/false; \ 679 fi; 680 $(verify_kallsyms) 681endef 682 683 684ifdef CONFIG_KALLSYMS 685# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 686# It's a three stage process: 687# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 688# empty 689# Running kallsyms on that gives us .tmp_kallsyms1.o with 690# the right size - vmlinux version (uname -v) is updated during this step 691# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 692# but due to the added section, some addresses have shifted. 693# From here, we generate a correct .tmp_kallsyms2.o 694# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 695# o Verify that the System.map from vmlinux matches the map from 696# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 697# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 698# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 699# temporary bypass to allow the kernel to be built while the 700# maintainers work out what went wrong with kallsyms. 701 702ifdef CONFIG_KALLSYMS_EXTRA_PASS 703last_kallsyms := 3 704else 705last_kallsyms := 2 706endif 707 708kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 709 710define verify_kallsyms 711 $(Q)$(if $($(quiet)cmd_sysmap), \ 712 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 713 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 714 $(Q)cmp -s System.map .tmp_System.map || \ 715 (echo Inconsistent kallsyms data; \ 716 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 717 rm .tmp_kallsyms* ; /bin/false ) 718endef 719 720# Update vmlinux version before link 721# Use + in front of this rule to silent warning about make -j1 722# First command is ':' to allow us to use + in front of this rule 723cmd_ksym_ld = $(cmd_vmlinux__) 724define rule_ksym_ld 725 : 726 +$(call cmd,vmlinux_version) 727 $(call cmd,vmlinux__) 728 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 729endef 730 731# Generate .S file with all kernel symbols 732quiet_cmd_kallsyms = KSYM $@ 733 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 734 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 735 736.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 737 $(call if_changed_dep,as_o_S) 738 739.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 740 $(call cmd,kallsyms) 741 742# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 743.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 744 $(call if_changed_rule,ksym_ld) 745 746.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 747 $(call if_changed,vmlinux__) 748 749.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 750 $(call if_changed,vmlinux__) 751 752# Needs to visit scripts/ before $(KALLSYMS) can be used. 753$(KALLSYMS): scripts ; 754 755# Generate some data for debugging strange kallsyms problems 756debug_kallsyms: .tmp_map$(last_kallsyms) 757 758.tmp_map%: .tmp_vmlinux% FORCE 759 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 760 761.tmp_map3: .tmp_map2 762 763.tmp_map2: .tmp_map1 764 765endif # ifdef CONFIG_KALLSYMS 766 767# vmlinux image - including updated kernel symbols 768vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 769 $(call if_changed_rule,vmlinux__) 770 $(Q)rm -f .old_version 771 772# The actual objects are generated when descending, 773# make sure no implicit rule kicks in 774$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 775 776# Handle descending into subdirectories listed in $(vmlinux-dirs) 777# Preset locale variables to speed up the build process. Limit locale 778# tweaks to this spot to avoid wrong language settings when running 779# make menuconfig etc. 780# Error messages still appears in the original language 781 782.PHONY: $(vmlinux-dirs) 783$(vmlinux-dirs): prepare scripts 784 $(Q)$(MAKE) $(build)=$@ 785 786# Things we need to do before we recursively start building the kernel 787# or the modules are listed in "prepare". 788# A multi level approach is used. prepareN is processed before prepareN-1. 789# archprepare is used in arch Makefiles and when processed asm symlink, 790# version.h and scripts_basic is processed / created. 791 792# Listed in dependency order 793.PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3 794 795# prepare-all is deprecated, use prepare as valid replacement 796.PHONY: prepare-all 797 798# prepare3 is used to check if we are building in a separate output directory, 799# and if so do: 800# 1) Check that make has not been executed in the kernel src $(srctree) 801# 2) Create the include2 directory, used for the second asm symlink 802 803prepare3: 804ifneq ($(KBUILD_SRC),) 805 @echo ' Using $(srctree) as source for kernel' 806 $(Q)if [ -f $(srctree)/.config ]; then \ 807 echo " $(srctree) is not clean, please run 'make mrproper'";\ 808 echo " in the '$(srctree)' directory.";\ 809 /bin/false; \ 810 fi; 811 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 812 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 813endif 814 815# prepare2 creates a makefile if using a separate output directory 816prepare2: prepare3 outputmakefile 817 818prepare1: prepare2 include/linux/version.h include/asm \ 819 include/config/MARKER 820ifneq ($(KBUILD_MODULES),) 821 $(Q)rm -rf $(MODVERDIR) 822 $(Q)mkdir -p $(MODVERDIR) 823endif 824 825archprepare: prepare1 scripts_basic 826 827prepare0: archprepare FORCE 828 $(Q)$(MAKE) $(build)=. 829 830# All the preparing.. 831prepare prepare-all: prepare0 832 833# Leave this as default for preprocessing vmlinux.lds.S, which is now 834# done in arch/$(ARCH)/kernel/Makefile 835 836export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 837 838# Single targets 839# --------------------------------------------------------------------------- 840 841%.s: %.c scripts FORCE 842 $(Q)$(MAKE) $(build)=$(@D) $@ 843%.i: %.c scripts FORCE 844 $(Q)$(MAKE) $(build)=$(@D) $@ 845%.o: %.c scripts FORCE 846 $(Q)$(MAKE) $(build)=$(@D) $@ 847%.ko: scripts FORCE 848 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o) 849 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 850%/: scripts prepare FORCE 851 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) 852%.lst: %.c scripts FORCE 853 $(Q)$(MAKE) $(build)=$(@D) $@ 854%.s: %.S scripts FORCE 855 $(Q)$(MAKE) $(build)=$(@D) $@ 856%.o: %.S scripts FORCE 857 $(Q)$(MAKE) $(build)=$(@D) $@ 858 859# FIXME: The asm symlink changes when $(ARCH) changes. That's 860# hard to detect, but I suppose "make mrproper" is a good idea 861# before switching between archs anyway. 862 863include/asm: 864 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 865 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 866 @ln -fsn asm-$(ARCH) $@ 867 868# Split autoconf.h into include/linux/config/* 869 870include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h 871 @echo ' SPLIT include/linux/autoconf.h -> include/config/*' 872 @scripts/basic/split-include include/linux/autoconf.h include/config 873 @touch $@ 874 875# Generate some files 876# --------------------------------------------------------------------------- 877 878# KERNELRELEASE can change from a few different places, meaning version.h 879# needs to be updated, so this check is forced on all builds 880 881uts_len := 64 882 883define filechk_version.h 884 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 885 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 886 exit 1; \ 887 fi; \ 888 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ 889 echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ 890 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ 891 ) 892endef 893 894include/linux/version.h: $(srctree)/Makefile FORCE 895 $(call filechk,version.h) 896 897# --------------------------------------------------------------------------- 898 899.PHONY: depend dep 900depend dep: 901 @echo '*** Warning: make $@ is unnecessary now.' 902 903# --------------------------------------------------------------------------- 904# Modules 905 906ifdef CONFIG_MODULES 907 908# By default, build modules as well 909 910all: modules 911 912# Build modules 913 914.PHONY: modules 915modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 916 @echo ' Building modules, stage 2.'; 917 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 918 919 920# Target to prepare building external modules 921.PHONY: modules_prepare 922modules_prepare: prepare scripts 923 924# Target to install modules 925.PHONY: modules_install 926modules_install: _modinst_ _modinst_post 927 928.PHONY: _modinst_ 929_modinst_: 930 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 931 echo "Warning: you may need to install module-init-tools"; \ 932 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 933 sleep 1; \ 934 fi 935 @rm -rf $(MODLIB)/kernel 936 @rm -f $(MODLIB)/source 937 @mkdir -p $(MODLIB)/kernel 938 @ln -s $(srctree) $(MODLIB)/source 939 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 940 rm -f $(MODLIB)/build ; \ 941 ln -s $(objtree) $(MODLIB)/build ; \ 942 fi 943 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 944 945# If System.map exists, run depmod. This deliberately does not have a 946# dependency on System.map since that would run the dependency tree on 947# vmlinux. This depmod is only for convenience to give the initial 948# boot a modules.dep even before / is mounted read-write. However the 949# boot script depmod is the master version. 950ifeq "$(strip $(INSTALL_MOD_PATH))" "" 951depmod_opts := 952else 953depmod_opts := -b $(INSTALL_MOD_PATH) -r 954endif 955.PHONY: _modinst_post 956_modinst_post: _modinst_ 957 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 958 959else # CONFIG_MODULES 960 961# Modules not configured 962# --------------------------------------------------------------------------- 963 964modules modules_install: FORCE 965 @echo 966 @echo "The present kernel configuration has modules disabled." 967 @echo "Type 'make config' and enable loadable module support." 968 @echo "Then build a kernel with module support enabled." 969 @echo 970 @exit 1 971 972endif # CONFIG_MODULES 973 974### 975# Cleaning is done on three levels. 976# make clean Delete most generated files 977# Leave enough to build external modules 978# make mrproper Delete the current configuration, and all generated files 979# make distclean Remove editor backup files, patch leftover files and the like 980 981# Directories & files removed with 'make clean' 982CLEAN_DIRS += $(MODVERDIR) 983CLEAN_FILES += vmlinux System.map \ 984 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 985 986# Directories & files removed with 'make mrproper' 987MRPROPER_DIRS += include/config include2 988MRPROPER_FILES += .config .config.old include/asm .version \ 989 include/linux/autoconf.h include/linux/version.h \ 990 Module.symvers tags TAGS cscope* 991 992# clean - Delete most, but leave enough to build external modules 993# 994clean: rm-dirs := $(CLEAN_DIRS) 995clean: rm-files := $(CLEAN_FILES) 996clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 997 998.PHONY: $(clean-dirs) clean archclean 999$(clean-dirs): 1000 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1001 1002clean: archclean $(clean-dirs) 1003 $(call cmd,rmdirs) 1004 $(call cmd,rmfiles) 1005 @find . $(RCS_FIND_IGNORE) \ 1006 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1007 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1008 -type f -print | xargs rm -f 1009 1010# mrproper - Delete all generated files, including .config 1011# 1012mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1013mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1014mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1015 1016.PHONY: $(mrproper-dirs) mrproper archmrproper 1017$(mrproper-dirs): 1018 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1019 1020mrproper: clean archmrproper $(mrproper-dirs) 1021 $(call cmd,rmdirs) 1022 $(call cmd,rmfiles) 1023 1024# distclean 1025# 1026.PHONY: distclean 1027 1028distclean: mrproper 1029 @find $(srctree) $(RCS_FIND_IGNORE) \ 1030 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1031 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1032 -o -name '.*.rej' -o -size 0 \ 1033 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1034 -type f -print | xargs rm -f 1035 1036 1037# Packaging of the kernel to various formats 1038# --------------------------------------------------------------------------- 1039# rpm target kept for backward compatibility 1040package-dir := $(srctree)/scripts/package 1041 1042.PHONY: %-pkg rpm 1043 1044%pkg: FORCE 1045 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1046rpm: FORCE 1047 $(Q)$(MAKE) -f $(package-dir)/Makefile $@ 1048 1049 1050# Brief documentation of the typical targets used 1051# --------------------------------------------------------------------------- 1052 1053boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1054boards := $(notdir $(boards)) 1055 1056help: 1057 @echo 'Cleaning targets:' 1058 @echo ' clean - remove most generated files but keep the config' 1059 @echo ' mrproper - remove all generated files + config + various backup files' 1060 @echo '' 1061 @echo 'Configuration targets:' 1062 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1063 @echo '' 1064 @echo 'Other generic targets:' 1065 @echo ' all - Build all targets marked with [*]' 1066 @echo '* vmlinux - Build the bare kernel' 1067 @echo '* modules - Build all modules' 1068 @echo ' modules_install - Install all modules' 1069 @echo ' dir/ - Build all files in dir and below' 1070 @echo ' dir/file.[ois] - Build specified target only' 1071 @echo ' dir/file.ko - Build module including final link' 1072 @echo ' rpm - Build a kernel as an RPM package' 1073 @echo ' tags/TAGS - Generate tags file for editors' 1074 @echo ' cscope - Generate cscope index' 1075 @echo ' kernelrelease - Output the release version string' 1076 @echo '' 1077 @echo 'Static analysers' 1078 @echo ' buildcheck - List dangling references to vmlinux discarded sections' 1079 @echo ' and init sections from non-init sections' 1080 @echo ' checkstack - Generate a list of stack hogs' 1081 @echo ' namespacecheck - Name space analysis on compiled kernel' 1082 @echo '' 1083 @echo 'Kernel packaging:' 1084 @$(MAKE) -f $(package-dir)/Makefile help 1085 @echo '' 1086 @echo 'Documentation targets:' 1087 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1088 @echo '' 1089 @echo 'Architecture specific targets ($(ARCH)):' 1090 @$(if $(archhelp),$(archhelp),\ 1091 echo ' No architecture specific help defined for $(ARCH)') 1092 @echo '' 1093 @$(if $(boards), \ 1094 $(foreach b, $(boards), \ 1095 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1096 echo '') 1097 1098 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1099 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1100 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' 1101 @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' 1102 @echo '' 1103 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1104 @echo 'For further info see the ./README file' 1105 1106 1107# Documentation targets 1108# --------------------------------------------------------------------------- 1109%docs: scripts_basic FORCE 1110 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1111 1112else # KBUILD_EXTMOD 1113 1114### 1115# External module support. 1116# When building external modules the kernel used as basis is considered 1117# read-only, and no consistency checks are made and the make 1118# system is not used on the basis kernel. If updates are required 1119# in the basis kernel ordinary make commands (without M=...) must 1120# be used. 1121# 1122# The following are the only valid targets when building external 1123# modules. 1124# make M=dir clean Delete all automatically generated files 1125# make M=dir modules Make all modules in specified dir 1126# make M=dir Same as 'make M=dir modules' 1127# make M=dir modules_install 1128# Install the modules build in the module directory 1129# Assumes install directory is already created 1130 1131# We are always building modules 1132KBUILD_MODULES := 1 1133.PHONY: crmodverdir 1134crmodverdir: 1135 $(Q)mkdir -p $(MODVERDIR) 1136 1137.PHONY: $(objtree)/Module.symvers 1138$(objtree)/Module.symvers: 1139 @test -e $(objtree)/Module.symvers || ( \ 1140 echo; \ 1141 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1142 echo " is missing; modules will have no dependencies and modversions."; \ 1143 echo ) 1144 1145module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1146.PHONY: $(module-dirs) modules 1147$(module-dirs): crmodverdir $(objtree)/Module.symvers 1148 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1149 1150modules: $(module-dirs) 1151 @echo ' Building modules, stage 2.'; 1152 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1153 1154.PHONY: modules_install 1155modules_install: 1156 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1157 1158clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1159 1160.PHONY: $(clean-dirs) clean 1161$(clean-dirs): 1162 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1163 1164clean: rm-dirs := $(MODVERDIR) 1165clean: $(clean-dirs) 1166 $(call cmd,rmdirs) 1167 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1168 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1169 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1170 -type f -print | xargs rm -f 1171 1172help: 1173 @echo ' Building external modules.' 1174 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1175 @echo '' 1176 @echo ' modules - default target, build the module(s)' 1177 @echo ' modules_install - install the module' 1178 @echo ' clean - remove generated files in module directory only' 1179 @echo '' 1180endif # KBUILD_EXTMOD 1181 1182# Generate tags for editors 1183# --------------------------------------------------------------------------- 1184 1185#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1186#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1187#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1188 1189ifeq ($(src),$(obj)) 1190__srctree = 1191else 1192__srctree = $(srctree)/ 1193endif 1194 1195ALLSOURCE_ARCHS := $(ARCH) 1196 1197define all-sources 1198 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1199 \( -name include -o -name arch \) -prune -o \ 1200 -name '*.[chS]' -print; \ 1201 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1202 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1203 -name '*.[chS]' -print; \ 1204 done ; \ 1205 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1206 -name '*.[chS]' -print; \ 1207 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1208 \( -name config -o -name 'asm-*' \) -prune \ 1209 -o -name '*.[chS]' -print; \ 1210 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1211 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1212 -name '*.[chS]' -print; \ 1213 done ; \ 1214 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1215 -name '*.[chS]' -print ) 1216endef 1217 1218quiet_cmd_cscope-file = FILELST cscope.files 1219 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1220 1221quiet_cmd_cscope = MAKE cscope.out 1222 cmd_cscope = cscope -b 1223 1224cscope: FORCE 1225 $(call cmd,cscope-file) 1226 $(call cmd,cscope) 1227 1228quiet_cmd_TAGS = MAKE $@ 1229define cmd_TAGS 1230 rm -f $@; \ 1231 ETAGSF=`etags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ 1232 $(all-sources) | xargs etags $$ETAGSF -a 1233endef 1234 1235TAGS: FORCE 1236 $(call cmd,TAGS) 1237 1238 1239quiet_cmd_tags = MAKE $@ 1240define cmd_tags 1241 rm -f $@; \ 1242 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && echo "-I __initdata,__exitdata,EXPORT_SYMBOL,EXPORT_SYMBOL_GPL --extra=+f"`; \ 1243 $(all-sources) | xargs ctags $$CTAGSF -a 1244endef 1245 1246tags: FORCE 1247 $(call cmd,tags) 1248 1249 1250# Scripts to check various things for consistency 1251# --------------------------------------------------------------------------- 1252 1253includecheck: 1254 find * $(RCS_FIND_IGNORE) \ 1255 -name '*.[hcS]' -type f -print | sort \ 1256 | xargs $(PERL) -w scripts/checkincludes.pl 1257 1258versioncheck: 1259 find * $(RCS_FIND_IGNORE) \ 1260 -name '*.[hcS]' -type f -print | sort \ 1261 | xargs $(PERL) -w scripts/checkversion.pl 1262 1263buildcheck: 1264 $(PERL) $(srctree)/scripts/reference_discarded.pl 1265 $(PERL) $(srctree)/scripts/reference_init.pl 1266 1267namespacecheck: 1268 $(PERL) $(srctree)/scripts/namespace.pl 1269 1270endif #ifeq ($(config-targets),1) 1271endif #ifeq ($(mixed-targets),1) 1272 1273.PHONY: checkstack 1274checkstack: 1275 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1276 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1277 1278kernelrelease: 1279 @echo $(KERNELRELEASE) 1280 1281# FIXME Should go into a make.lib or something 1282# =========================================================================== 1283 1284quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1285 cmd_rmdirs = rm -rf $(rm-dirs) 1286 1287quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1288 cmd_rmfiles = rm -f $(rm-files) 1289 1290 1291a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1292 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1293 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) 1294 1295quiet_cmd_as_o_S = AS $@ 1296cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1297 1298# read all saved command lines 1299 1300targets := $(wildcard $(sort $(targets))) 1301cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1302 1303ifneq ($(cmd_files),) 1304 $(cmd_files): ; # Do not try to update included dependency files 1305 include $(cmd_files) 1306endif 1307 1308# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1309# Usage: 1310# $(Q)$(MAKE) $(clean)=dir 1311clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1312 1313endif # skip-makefile 1314 1315FORCE: 1316