1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 18 4EXTRAVERSION = -prep 5NAME=Avast! A bilge rat! 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 = $(V) 38 endif 39endif 40ifndef KBUILD_VERBOSE 41 KBUILD_VERBOSE = 0 42endif 43 44# Call checker as part of compilation of C files 45# Use 'make C=1' to enable checking (sparse, by default) 46# Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....' 47 48ifdef C 49 ifeq ("$(origin C)", "command line") 50 KBUILD_CHECKSRC = $(C) 51 endif 52endif 53ifndef KBUILD_CHECKSRC 54 KBUILD_CHECKSRC = 0 55endif 56 57# Use make M=dir to specify directory of external module to build 58# Old syntax make ... SUBDIRS=$PWD is still supported 59# Setting the environment variable KBUILD_EXTMOD take precedence 60ifdef SUBDIRS 61 KBUILD_EXTMOD ?= $(SUBDIRS) 62endif 63ifdef M 64 ifeq ("$(origin M)", "command line") 65 KBUILD_EXTMOD := $(M) 66 endif 67endif 68 69 70# kbuild supports saving output files in a separate directory. 71# To locate output files in a separate directory two syntaxes are supported. 72# In both cases the working directory must be the root of the kernel src. 73# 1) O= 74# Use "make O=dir/to/store/output/files/" 75# 76# 2) Set KBUILD_OUTPUT 77# Set the environment variable KBUILD_OUTPUT to point to the directory 78# where the output files shall be placed. 79# export KBUILD_OUTPUT=dir/to/store/output/files/ 80# make 81# 82# The O= assignment takes precedence over the KBUILD_OUTPUT environment 83# variable. 84 85 86# KBUILD_SRC is set on invocation of make in OBJ directory 87# KBUILD_SRC is not intended to be used by the regular user (for now) 88ifeq ($(KBUILD_SRC),) 89 90# OK, Make called in directory where kernel src resides 91# Do we want to locate output files in a separate directory? 92ifdef O 93 ifeq ("$(origin O)", "command line") 94 KBUILD_OUTPUT := $(O) 95 endif 96endif 97 98# That's our default target when none is given on the command line 99PHONY := _all 100_all: 101 102ifneq ($(KBUILD_OUTPUT),) 103# Invoke a second make in the output directory, passing relevant variables 104# check that the output directory actually exists 105saved-output := $(KBUILD_OUTPUT) 106KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 107$(if $(KBUILD_OUTPUT),, \ 108 $(error output directory "$(saved-output)" does not exist)) 109 110PHONY += $(MAKECMDGOALS) 111 112$(filter-out _all,$(MAKECMDGOALS)) _all: 113 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 114 KBUILD_SRC=$(CURDIR) \ 115 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 116 117# Leave processing to above invocation of make 118skip-makefile := 1 119endif # ifneq ($(KBUILD_OUTPUT),) 120endif # ifeq ($(KBUILD_SRC),) 121 122# We process the rest of the Makefile if this is the final invocation of make 123ifeq ($(skip-makefile),) 124 125# If building an external module we do not care about the all: rule 126# but instead _all depend on modules 127PHONY += all 128ifeq ($(KBUILD_EXTMOD),) 129_all: all 130else 131_all: modules 132endif 133 134srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 135TOPDIR := $(srctree) 136# FIXME - TOPDIR is obsolete, use srctree/objtree 137objtree := $(CURDIR) 138src := $(srctree) 139obj := $(objtree) 140 141VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 142 143export srctree objtree VPATH TOPDIR 144 145 146# SUBARCH tells the usermode build what the underlying arch is. That is set 147# first, and if a usermode build is happening, the "ARCH=um" on the command 148# line overrides the setting of ARCH below. If a native build is happening, 149# then ARCH is assigned, getting whatever value it gets normally, and 150# SUBARCH is subsequently ignored. 151 152SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 153 -e s/arm.*/arm/ -e s/sa110/arm/ \ 154 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 155 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 156 157# Cross compiling and selecting different set of gcc/bin-utils 158# --------------------------------------------------------------------------- 159# 160# When performing cross compilation for other architectures ARCH shall be set 161# to the target architecture. (See arch/* for the possibilities). 162# ARCH can be set during invocation of make: 163# make ARCH=ia64 164# Another way is to have ARCH set in the environment. 165# The default ARCH is the host where make is executed. 166 167# CROSS_COMPILE specify the prefix used for all executables used 168# during compilation. Only gcc and related bin-utils executables 169# are prefixed with $(CROSS_COMPILE). 170# CROSS_COMPILE can be set on the command line 171# make CROSS_COMPILE=ia64-linux- 172# Alternatively CROSS_COMPILE can be set in the environment. 173# Default value for CROSS_COMPILE is not to prefix executables 174# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 175 176ARCH ?= $(SUBARCH) 177CROSS_COMPILE ?= 178 179# Architecture as present in compile.h 180UTS_MACHINE := $(ARCH) 181 182KCONFIG_CONFIG ?= .config 183 184# SHELL used by kbuild 185CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 186 else if [ -x /bin/bash ]; then echo /bin/bash; \ 187 else echo sh; fi ; fi) 188 189HOSTCC = gcc 190HOSTCXX = g++ 191HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 192HOSTCXXFLAGS = -O2 193 194# Decide whether to build built-in, modular, or both. 195# Normally, just do built-in. 196 197KBUILD_MODULES := 198KBUILD_BUILTIN := 1 199 200# If we have only "make modules", don't compile built-in objects. 201# When we're building modules with modversions, we need to consider 202# the built-in objects during the descend as well, in order to 203# make sure the checksums are up to date before we record them. 204 205ifeq ($(MAKECMDGOALS),modules) 206 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 207endif 208 209# If we have "make <whatever> modules", compile modules 210# in addition to whatever we do anyway. 211# Just "make" or "make all" shall build modules as well 212 213ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 214 KBUILD_MODULES := 1 215endif 216 217ifeq ($(MAKECMDGOALS),) 218 KBUILD_MODULES := 1 219endif 220 221export KBUILD_MODULES KBUILD_BUILTIN 222export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 223 224# Beautify output 225# --------------------------------------------------------------------------- 226# 227# Normally, we echo the whole command before executing it. By making 228# that echo $($(quiet)$(cmd)), we now have the possibility to set 229# $(quiet) to choose other forms of output instead, e.g. 230# 231# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 232# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 233# 234# If $(quiet) is empty, the whole command will be printed. 235# If it is set to "quiet_", only the short version will be printed. 236# If it is set to "silent_", nothing will be printed at all, since 237# the variable $(silent_cmd_cc_o_c) doesn't exist. 238# 239# A simple variant is to prefix commands with $(Q) - that's useful 240# for commands that shall be hidden in non-verbose mode. 241# 242# $(Q)ln $@ :< 243# 244# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 245# If KBUILD_VERBOSE equals 1 then the above command is displayed. 246 247ifeq ($(KBUILD_VERBOSE),1) 248 quiet = 249 Q = 250else 251 quiet=quiet_ 252 Q = @ 253endif 254 255# If the user is running make -s (silent mode), suppress echoing of 256# commands 257 258ifneq ($(findstring s,$(MAKEFLAGS)),) 259 quiet=silent_ 260endif 261 262export quiet Q KBUILD_VERBOSE 263 264 265# Look for make include files relative to root of kernel src 266MAKEFLAGS += --include-dir=$(srctree) 267 268# We need some generic definitions 269include $(srctree)/scripts/Kbuild.include 270 271# Make variables (CC, etc...) 272 273AS = $(CROSS_COMPILE)as 274LD = $(CROSS_COMPILE)ld 275CC = $(CROSS_COMPILE)gcc 276CPP = $(CC) -E 277AR = $(CROSS_COMPILE)ar 278NM = $(CROSS_COMPILE)nm 279STRIP = $(CROSS_COMPILE)strip 280OBJCOPY = $(CROSS_COMPILE)objcopy 281OBJDUMP = $(CROSS_COMPILE)objdump 282AWK = awk 283GENKSYMS = scripts/genksyms/genksyms 284DEPMOD = /sbin/depmod 285KALLSYMS = scripts/kallsyms 286PERL = perl 287CHECK = sparse 288 289CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 290MODFLAGS = -DMODULE 291CFLAGS_MODULE = $(MODFLAGS) 292AFLAGS_MODULE = $(MODFLAGS) 293LDFLAGS_MODULE = -r 294CFLAGS_KERNEL = 295AFLAGS_KERNEL = 296 297 298# Use LINUXINCLUDE when you must reference the include/ directory. 299# Needed to be compatible with the O= option 300LINUXINCLUDE := -Iinclude \ 301 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 302 -include include/linux/autoconf.h 303 304CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 305 306CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 307 -fno-strict-aliasing -fno-common -Wstrict-prototypes -Wundef -Werror-implicit-function-declaration 308AFLAGS := -D__ASSEMBLY__ 309 310# Read KERNELRELEASE from include/config/kernel.release (if it exists) 311KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 312KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 313 314export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 315export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 316export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 317export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 318 319export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 320export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 321export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 322 323# When compiling out-of-tree modules, put MODVERDIR in the module 324# tree rather than in the kernel tree. The kernel tree might 325# even be read-only. 326export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 327 328# Files to ignore in find ... statements 329 330RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 331export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 332 333# =========================================================================== 334# Rules shared between *config targets and build targets 335 336# Basic helpers built in scripts/ 337PHONY += scripts_basic 338scripts_basic: 339 $(Q)$(MAKE) $(build)=scripts/basic 340 341# To avoid any implicit rule to kick in, define an empty command. 342scripts/basic/%: scripts_basic ; 343 344PHONY += outputmakefile 345# outputmakefile generates a Makefile in the output directory, if using a 346# separate output directory. This allows convenient use of make in the 347# output directory. 348outputmakefile: 349ifneq ($(KBUILD_SRC),) 350 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 351 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 352endif 353 354# To make sure we do not include .config for any of the *config targets 355# catch them early, and hand them over to scripts/kconfig/Makefile 356# It is allowed to specify more targets when calling make, including 357# mixing *config targets and build targets. 358# For example 'make oldconfig all'. 359# Detect when mixed targets is specified, and make a second invocation 360# of make so .config is not included in this case either (for *config). 361 362no-dot-config-targets := clean mrproper distclean \ 363 cscope TAGS tags help %docs check% \ 364 include/linux/version.h headers_% \ 365 kernelrelease kernelversion 366 367config-targets := 0 368mixed-targets := 0 369dot-config := 1 370 371ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 372 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 373 dot-config := 0 374 endif 375endif 376 377ifeq ($(KBUILD_EXTMOD),) 378 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 379 config-targets := 1 380 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 381 mixed-targets := 1 382 endif 383 endif 384endif 385 386ifeq ($(mixed-targets),1) 387# =========================================================================== 388# We're called with mixed targets (*config and build targets). 389# Handle them one by one. 390 391%:: FORCE 392 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 393 394else 395ifeq ($(config-targets),1) 396# =========================================================================== 397# *config targets only - make sure prerequisites are updated, and descend 398# in scripts/kconfig to make the *config target 399 400# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 401# KBUILD_DEFCONFIG may point out an alternative default configuration 402# used for 'make defconfig' 403include $(srctree)/arch/$(ARCH)/Makefile 404export KBUILD_DEFCONFIG 405 406config %config: scripts_basic outputmakefile FORCE 407 $(Q)mkdir -p include/linux include/config 408 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 409 410else 411# =========================================================================== 412# Build targets only - this includes vmlinux, arch specific targets, clean 413# targets and others. In general all targets except *config targets. 414 415ifeq ($(KBUILD_EXTMOD),) 416# Additional helpers built in scripts/ 417# Carefully list dependencies so we do not try to build scripts twice 418# in parallel 419PHONY += scripts 420scripts: scripts_basic include/config/auto.conf 421 $(Q)$(MAKE) $(build)=$(@) 422 423# Objects we will link into vmlinux / subdirs we need to visit 424init-y := init/ 425drivers-y := drivers/ sound/ 426net-y := net/ 427libs-y := lib/ 428core-y := usr/ 429endif # KBUILD_EXTMOD 430 431ifeq ($(dot-config),1) 432# Read in config 433-include include/config/auto.conf 434 435ifeq ($(KBUILD_EXTMOD),) 436# Read in dependencies to all Kconfig* files, make sure to run 437# oldconfig if changes are detected. 438-include include/config/auto.conf.cmd 439 440# To avoid any implicit rule to kick in, define an empty command 441$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 442 443# If .config is newer than include/config/auto.conf, someone tinkered 444# with it and forgot to run make oldconfig. 445# if auto.conf.cmd is missing then we are probably in a cleaned tree so 446# we execute the config step to be sure to catch updated Kconfig files 447include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 448 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 449else 450# external modules needs include/linux/autoconf.h and include/config/auto.conf 451# but do not care if they are up-to-date. Use auto.conf to trigger the test 452PHONY += include/config/auto.conf 453 454include/config/auto.conf: 455 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 456 echo; \ 457 echo " ERROR: Kernel configuration is invalid."; \ 458 echo " include/linux/autoconf.h or $@ are missing."; \ 459 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 460 echo; \ 461 /bin/false) 462 463endif # KBUILD_EXTMOD 464 465else 466# Dummy target needed, because used as prerequisite 467include/config/auto.conf: ; 468endif # $(dot-config) 469 470# The all: target is the default when no target is given on the 471# command line. 472# This allow a user to issue only 'make' to build a kernel including modules 473# Defaults vmlinux but it is usually overridden in the arch makefile 474all: vmlinux 475 476ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 477CFLAGS += -Os 478else 479CFLAGS += -O2 480endif 481 482include $(srctree)/arch/$(ARCH)/Makefile 483 484ifdef CONFIG_FRAME_POINTER 485CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 486else 487CFLAGS += -fomit-frame-pointer 488endif 489 490ifdef CONFIG_DEBUG_INFO 491CFLAGS += -g 492endif 493 494# Force gcc to behave correct even for buggy distributions 495CFLAGS += $(call cc-option, -fno-stack-protector) 496 497# arch Makefile may override CC so keep this after arch Makefile is included 498NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 499CHECKFLAGS += $(NOSTDINC_FLAGS) 500 501# warn about C99 declaration after statement 502CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 503 504# disable pointer signed / unsigned warnings in gcc 4.0 505CFLAGS += $(call cc-option,-Wno-pointer-sign,) 506 507# Default kernel image to build when no specific target is given. 508# KBUILD_IMAGE may be overruled on the command line or 509# set in the environment 510# Also any assignments in arch/$(ARCH)/Makefile take precedence over 511# this default value 512export KBUILD_IMAGE ?= vmlinux 513 514# 515# INSTALL_PATH specifies where to place the updated kernel and system map 516# images. Default is /boot, but you can set it to other values 517export INSTALL_PATH ?= /boot 518 519# 520# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 521# relocations required by build roots. This is not defined in the 522# makefile but the argument can be passed to make if needed. 523# 524 525MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 526export MODLIB 527 528# 529# INSTALL_MOD_STRIP, if defined, will cause modules to be 530# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 531# the default option --strip-debug will be used. Otherwise, 532# INSTALL_MOD_STRIP will used as the options to the strip command. 533 534ifdef INSTALL_MOD_STRIP 535ifeq ($(INSTALL_MOD_STRIP),1) 536mod_strip_cmd = $(STRIP) --strip-debug 537else 538mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 539endif # INSTALL_MOD_STRIP=1 540else 541mod_strip_cmd = true 542endif # INSTALL_MOD_STRIP 543export mod_strip_cmd 544 545 546ifeq ($(KBUILD_EXTMOD),) 547core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 548 549vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 550 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 551 $(net-y) $(net-m) $(libs-y) $(libs-m))) 552 553vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 554 $(init-n) $(init-) \ 555 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 556 $(net-n) $(net-) $(libs-n) $(libs-)))) 557 558init-y := $(patsubst %/, %/built-in.o, $(init-y)) 559core-y := $(patsubst %/, %/built-in.o, $(core-y)) 560drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 561net-y := $(patsubst %/, %/built-in.o, $(net-y)) 562libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 563libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 564libs-y := $(libs-y1) $(libs-y2) 565 566# Build vmlinux 567# --------------------------------------------------------------------------- 568# vmlinux is built from the objects selected by $(vmlinux-init) and 569# $(vmlinux-main). Most are built-in.o files from top-level directories 570# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 571# Ordering when linking is important, and $(vmlinux-init) must be first. 572# 573# vmlinux 574# ^ 575# | 576# +-< $(vmlinux-init) 577# | +--< init/version.o + more 578# | 579# +--< $(vmlinux-main) 580# | +--< driver/built-in.o mm/built-in.o + more 581# | 582# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 583# 584# vmlinux version (uname -v) cannot be updated during normal 585# descending-into-subdirs phase since we do not yet know if we need to 586# update vmlinux. 587# Therefore this step is delayed until just before final link of vmlinux - 588# except in the kallsyms case where it is done just before adding the 589# symbols to the kernel. 590# 591# System.map is generated to document addresses of all kernel symbols 592 593vmlinux-init := $(head-y) $(init-y) 594vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 595vmlinux-all := $(vmlinux-init) $(vmlinux-main) 596vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 597 598# Rule to link vmlinux - also used during CONFIG_KALLSYMS 599# May be overridden by arch/$(ARCH)/Makefile 600quiet_cmd_vmlinux__ ?= LD $@ 601 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 602 -T $(vmlinux-lds) $(vmlinux-init) \ 603 --start-group $(vmlinux-main) --end-group \ 604 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 605 606# Generate new vmlinux version 607quiet_cmd_vmlinux_version = GEN .version 608 cmd_vmlinux_version = set -e; \ 609 if [ ! -r .version ]; then \ 610 rm -f .version; \ 611 echo 1 >.version; \ 612 else \ 613 mv .version .old_version; \ 614 expr 0$$(cat .old_version) + 1 >.version; \ 615 fi; \ 616 $(MAKE) $(build)=init 617 618# Generate System.map 619quiet_cmd_sysmap = SYSMAP 620 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 621 622# Link of vmlinux 623# If CONFIG_KALLSYMS is set .version is already updated 624# Generate System.map and verify that the content is consistent 625# Use + in front of the vmlinux_version rule to silent warning with make -j2 626# First command is ':' to allow us to use + in front of the rule 627define rule_vmlinux__ 628 : 629 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 630 631 $(call cmd,vmlinux__) 632 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 633 634 $(Q)$(if $($(quiet)cmd_sysmap), \ 635 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 636 $(cmd_sysmap) $@ System.map; \ 637 if [ $$? -ne 0 ]; then \ 638 rm -f $@; \ 639 /bin/false; \ 640 fi; 641 $(verify_kallsyms) 642endef 643 644 645ifdef CONFIG_KALLSYMS 646# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 647# It's a three stage process: 648# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 649# empty 650# Running kallsyms on that gives us .tmp_kallsyms1.o with 651# the right size - vmlinux version (uname -v) is updated during this step 652# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 653# but due to the added section, some addresses have shifted. 654# From here, we generate a correct .tmp_kallsyms2.o 655# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 656# o Verify that the System.map from vmlinux matches the map from 657# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 658# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 659# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 660# temporary bypass to allow the kernel to be built while the 661# maintainers work out what went wrong with kallsyms. 662 663ifdef CONFIG_KALLSYMS_EXTRA_PASS 664last_kallsyms := 3 665else 666last_kallsyms := 2 667endif 668 669kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 670 671define verify_kallsyms 672 $(Q)$(if $($(quiet)cmd_sysmap), \ 673 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 674 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 675 $(Q)cmp -s System.map .tmp_System.map || \ 676 (echo Inconsistent kallsyms data; \ 677 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 678 rm .tmp_kallsyms* ; /bin/false ) 679endef 680 681# Update vmlinux version before link 682# Use + in front of this rule to silent warning about make -j1 683# First command is ':' to allow us to use + in front of this rule 684cmd_ksym_ld = $(cmd_vmlinux__) 685define rule_ksym_ld 686 : 687 +$(call cmd,vmlinux_version) 688 $(call cmd,vmlinux__) 689 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 690endef 691 692# Generate .S file with all kernel symbols 693quiet_cmd_kallsyms = KSYM $@ 694 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 695 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 696 697.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 698 $(call if_changed_dep,as_o_S) 699 700.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 701 $(call cmd,kallsyms) 702 703# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 704.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 705 $(call if_changed_rule,ksym_ld) 706 707.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 708 $(call if_changed,vmlinux__) 709 710.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 711 $(call if_changed,vmlinux__) 712 713# Needs to visit scripts/ before $(KALLSYMS) can be used. 714$(KALLSYMS): scripts ; 715 716# Generate some data for debugging strange kallsyms problems 717debug_kallsyms: .tmp_map$(last_kallsyms) 718 719.tmp_map%: .tmp_vmlinux% FORCE 720 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 721 722.tmp_map3: .tmp_map2 723 724.tmp_map2: .tmp_map1 725 726endif # ifdef CONFIG_KALLSYMS 727 728# vmlinux image - including updated kernel symbols 729vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 730 $(call if_changed_rule,vmlinux__) 731 $(Q)rm -f .old_version 732 733# The actual objects are generated when descending, 734# make sure no implicit rule kicks in 735$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 736 737# Handle descending into subdirectories listed in $(vmlinux-dirs) 738# Preset locale variables to speed up the build process. Limit locale 739# tweaks to this spot to avoid wrong language settings when running 740# make menuconfig etc. 741# Error messages still appears in the original language 742 743PHONY += $(vmlinux-dirs) 744$(vmlinux-dirs): prepare scripts 745 $(Q)$(MAKE) $(build)=$@ 746 747# Build the kernel release string 748# The KERNELRELEASE is stored in a file named include/config/kernel.release 749# to be used when executing for example make install or make modules_install 750# 751# Take the contents of any files called localversion* and the config 752# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 753# LOCALVERSION from the command line override all of this 754 755nullstring := 756space := $(nullstring) # end of line 757 758___localver = $(objtree)/localversion* $(srctree)/localversion* 759__localver = $(sort $(wildcard $(___localver))) 760# skip backup files (containing '~') 761_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 762 763localver = $(subst $(space),, \ 764 $(shell cat /dev/null $(_localver)) \ 765 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 766 767# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 768# and if the SCM is know a tag from the SCM is appended. 769# The appended tag is determined by the SCM used. 770# 771# Currently, only git is supported. 772# Other SCMs can edit scripts/setlocalversion and add the appropriate 773# checks as needed. 774ifdef CONFIG_LOCALVERSION_AUTO 775 _localver-auto = $(shell $(CONFIG_SHELL) \ 776 $(srctree)/scripts/setlocalversion $(srctree)) 777 localver-auto = $(LOCALVERSION)$(_localver-auto) 778endif 779 780localver-full = $(localver)$(localver-auto) 781 782# Store (new) KERNELRELASE string in include/config/kernel.release 783kernelrelease = $(KERNELVERSION)$(localver-full) 784include/config/kernel.release: include/config/auto.conf FORCE 785 $(Q)rm -f $@ 786 $(Q)echo $(kernelrelease) > $@ 787 788 789# Things we need to do before we recursively start building the kernel 790# or the modules are listed in "prepare". 791# A multi level approach is used. prepareN is processed before prepareN-1. 792# archprepare is used in arch Makefiles and when processed asm symlink, 793# version.h and scripts_basic is processed / created. 794 795# Listed in dependency order 796PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 797 798# prepare-all is deprecated, use prepare as valid replacement 799PHONY += prepare-all 800 801# prepare3 is used to check if we are building in a separate output directory, 802# and if so do: 803# 1) Check that make has not been executed in the kernel src $(srctree) 804# 2) Create the include2 directory, used for the second asm symlink 805prepare3: include/config/kernel.release 806ifneq ($(KBUILD_SRC),) 807 @echo ' Using $(srctree) as source for kernel' 808 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 809 echo " $(srctree) is not clean, please run 'make mrproper'";\ 810 echo " in the '$(srctree)' directory.";\ 811 /bin/false; \ 812 fi; 813 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 814 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 815endif 816 817# prepare2 creates a makefile if using a separate output directory 818prepare2: prepare3 outputmakefile 819 820prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 821 include/asm include/config/auto.conf 822ifneq ($(KBUILD_MODULES),) 823 $(Q)mkdir -p $(MODVERDIR) 824 $(Q)rm -f $(MODVERDIR)/* 825endif 826 827archprepare: prepare1 scripts_basic 828 829prepare0: archprepare FORCE 830 $(Q)$(MAKE) $(build)=. 831 832# All the preparing.. 833prepare prepare-all: prepare0 834 835# Leave this as default for preprocessing vmlinux.lds.S, which is now 836# done in arch/$(ARCH)/kernel/Makefile 837 838export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 839 840# FIXME: The asm symlink changes when $(ARCH) changes. That's 841# hard to detect, but I suppose "make mrproper" is a good idea 842# before switching between archs anyway. 843 844include/asm: 845 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 846 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 847 @ln -fsn asm-$(ARCH) $@ 848 849# Generate some files 850# --------------------------------------------------------------------------- 851 852# KERNELRELEASE can change from a few different places, meaning version.h 853# needs to be updated, so this check is forced on all builds 854 855uts_len := 64 856define filechk_utsrelease.h 857 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 858 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 859 exit 1; \ 860 fi; \ 861 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 862endef 863 864define filechk_version.h 865 (echo \#define LINUX_VERSION_CODE $(shell \ 866 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 867 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 868endef 869 870include/linux/version.h: $(srctree)/Makefile FORCE 871 $(call filechk,version.h) 872 873include/linux/utsrelease.h: include/config/kernel.release FORCE 874 $(call filechk,utsrelease.h) 875 876# --------------------------------------------------------------------------- 877 878PHONY += depend dep 879depend dep: 880 @echo '*** Warning: make $@ is unnecessary now.' 881 882# --------------------------------------------------------------------------- 883# Kernel headers 884INSTALL_HDR_PATH=$(objtree)/usr 885export INSTALL_HDR_PATH 886 887PHONY += headers_install 888headers_install: include/linux/version.h 889 @if [ ! -r include/asm-$(ARCH)/Kbuild ]; then \ 890 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \ 891 exit 1 ; fi 892 $(Q)unifdef -Ux /dev/null 893 $(Q)rm -rf $(INSTALL_HDR_PATH)/include 894 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include 895 896PHONY += headers_check 897headers_check: headers_install 898 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 899 900# --------------------------------------------------------------------------- 901# Modules 902 903ifdef CONFIG_MODULES 904 905# By default, build modules as well 906 907all: modules 908 909# Build modules 910 911PHONY += modules 912modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 913 @echo ' Building modules, stage 2.'; 914 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 915 916 917# Target to prepare building external modules 918PHONY += modules_prepare 919modules_prepare: prepare scripts 920 921# Target to install modules 922PHONY += modules_install 923modules_install: _modinst_ _modinst_post 924 925PHONY += _modinst_ 926_modinst_: 927 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 928 echo "Warning: you may need to install module-init-tools"; \ 929 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 930 sleep 1; \ 931 fi 932 @rm -rf $(MODLIB)/kernel 933 @rm -f $(MODLIB)/source 934 @mkdir -p $(MODLIB)/kernel 935 @ln -s $(srctree) $(MODLIB)/source 936 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 937 rm -f $(MODLIB)/build ; \ 938 ln -s $(objtree) $(MODLIB)/build ; \ 939 fi 940 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 941 942# If System.map exists, run depmod. This deliberately does not have a 943# dependency on System.map since that would run the dependency tree on 944# vmlinux. This depmod is only for convenience to give the initial 945# boot a modules.dep even before / is mounted read-write. However the 946# boot script depmod is the master version. 947ifeq "$(strip $(INSTALL_MOD_PATH))" "" 948depmod_opts := 949else 950depmod_opts := -b $(INSTALL_MOD_PATH) -r 951endif 952PHONY += _modinst_post 953_modinst_post: _modinst_ 954 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 955 956else # CONFIG_MODULES 957 958# Modules not configured 959# --------------------------------------------------------------------------- 960 961modules modules_install: FORCE 962 @echo 963 @echo "The present kernel configuration has modules disabled." 964 @echo "Type 'make config' and enable loadable module support." 965 @echo "Then build a kernel with module support enabled." 966 @echo 967 @exit 1 968 969endif # CONFIG_MODULES 970 971### 972# Cleaning is done on three levels. 973# make clean Delete most generated files 974# Leave enough to build external modules 975# make mrproper Delete the current configuration, and all generated files 976# make distclean Remove editor backup files, patch leftover files and the like 977 978# Directories & files removed with 'make clean' 979CLEAN_DIRS += $(MODVERDIR) 980CLEAN_FILES += vmlinux System.map \ 981 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 982 983# Directories & files removed with 'make mrproper' 984MRPROPER_DIRS += include/config include2 usr/include 985MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 986 include/linux/autoconf.h include/linux/version.h \ 987 include/linux/utsrelease.h \ 988 Module.symvers tags TAGS cscope* 989 990# clean - Delete most, but leave enough to build external modules 991# 992clean: rm-dirs := $(CLEAN_DIRS) 993clean: rm-files := $(CLEAN_FILES) 994clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 995 996PHONY += $(clean-dirs) clean archclean 997$(clean-dirs): 998 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 999 1000clean: archclean $(clean-dirs)
1001 $(call cmd,rmdirs) 1002 $(call cmd,rmfiles) 1003 @find . $(RCS_FIND_IGNORE) \ 1004 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1005 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1006 -o -name '*.symtypes' \) \ 1007 -type f -print | xargs rm -f 1008 1009# mrproper - Delete all generated files, including .config 1010# 1011mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1012mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1013mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1014 1015PHONY += $(mrproper-dirs) mrproper archmrproper 1016$(mrproper-dirs): 1017 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1018 1019mrproper: clean archmrproper $(mrproper-dirs) 1020 $(call cmd,rmdirs) 1021 $(call cmd,rmfiles) 1022 1023# distclean 1024# 1025PHONY += distclean 1026 1027distclean: mrproper 1028 @find $(srctree) $(RCS_FIND_IGNORE) \ 1029 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1030 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1031 -o -name '.*.rej' -o -size 0 \ 1032 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1033 -type f -print | xargs rm -f 1034 1035 1036# Packaging of the kernel to various formats 1037# --------------------------------------------------------------------------- 1038# rpm target kept for backward compatibility 1039package-dir := $(srctree)/scripts/package 1040 1041%pkg: include/config/kernel.release FORCE 1042 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1043rpm: include/config/kernel.release FORCE 1044 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1045 1046 1047# Brief documentation of the typical targets used 1048# --------------------------------------------------------------------------- 1049 1050boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1051boards := $(notdir $(boards)) 1052 1053help: 1054 @echo 'Cleaning targets:' 1055 @echo ' clean - remove most generated files but keep the config' 1056 @echo ' mrproper - remove all generated files + config + various backup files' 1057 @echo '' 1058 @echo 'Configuration targets:' 1059 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1060 @echo '' 1061 @echo 'Other generic targets:' 1062 @echo ' all - Build all targets marked with [*]' 1063 @echo '* vmlinux - Build the bare kernel' 1064 @echo '* modules - Build all modules' 1065 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1066 @echo ' dir/ - Build all files in dir and below' 1067 @echo ' dir/file.[ois] - Build specified target only' 1068 @echo ' dir/file.ko - Build module including final link' 1069 @echo ' rpm - Build a kernel as an RPM package' 1070 @echo ' tags/TAGS - Generate tags file for editors' 1071 @echo ' cscope - Generate cscope index' 1072 @echo ' kernelrelease - Output the release version string' 1073 @echo ' kernelversion - Output the version stored in Makefile' 1074 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \ 1075 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1076 fi 1077 @echo ' (default: $(INSTALL_HDR_PATH))' 1078 @echo '' 1079 @echo 'Static analysers' 1080 @echo ' checkstack - Generate a list of stack hogs' 1081 @echo ' namespacecheck - Name space analysis on compiled kernel' 1082 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \ 1083 echo ' headers_check - Sanity check on exported headers'; \ 1084 fi 1085 @echo '' 1086 @echo 'Kernel packaging:' 1087 @$(MAKE) $(build)=$(package-dir) help 1088 @echo '' 1089 @echo 'Documentation targets:' 1090 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1091 @echo '' 1092 @echo 'Architecture specific targets ($(ARCH)):' 1093 @$(if $(archhelp),$(archhelp),\ 1094 echo ' No architecture specific help defined for $(ARCH)') 1095 @echo '' 1096 @$(if $(boards), \ 1097 $(foreach b, $(boards), \ 1098 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1099 echo '') 1100 1101 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1102 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1103 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1104 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1105 @echo '' 1106 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1107 @echo 'For further info see the ./README file' 1108 1109 1110# Documentation targets 1111# --------------------------------------------------------------------------- 1112%docs: scripts_basic FORCE 1113 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1114 1115else # KBUILD_EXTMOD 1116 1117### 1118# External module support. 1119# When building external modules the kernel used as basis is considered 1120# read-only, and no consistency checks are made and the make 1121# system is not used on the basis kernel. If updates are required 1122# in the basis kernel ordinary make commands (without M=...) must 1123# be used. 1124# 1125# The following are the only valid targets when building external 1126# modules. 1127# make M=dir clean Delete all automatically generated files 1128# make M=dir modules Make all modules in specified dir 1129# make M=dir Same as 'make M=dir modules' 1130# make M=dir modules_install 1131# Install the modules built in the module directory 1132# Assumes install directory is already created 1133 1134# We are always building modules 1135KBUILD_MODULES := 1 1136PHONY += crmodverdir 1137crmodverdir: 1138 $(Q)mkdir -p $(MODVERDIR) 1139 $(Q)rm -f $(MODVERDIR)/* 1140 1141PHONY += $(objtree)/Module.symvers 1142$(objtree)/Module.symvers: 1143 @test -e $(objtree)/Module.symvers || ( \ 1144 echo; \ 1145 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1146 echo " is missing; modules will have no dependencies and modversions."; \ 1147 echo ) 1148 1149module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1150PHONY += $(module-dirs) modules 1151$(module-dirs): crmodverdir $(objtree)/Module.symvers 1152 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1153 1154modules: $(module-dirs) 1155 @echo ' Building modules, stage 2.'; 1156 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1157 1158PHONY += modules_install 1159modules_install: _emodinst_ _emodinst_post 1160 1161install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1162PHONY += _emodinst_ 1163_emodinst_: 1164 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1165 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1166 1167# Run depmod only is we have System.map and depmod is executable 1168quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1169 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1170 $(DEPMOD) -ae -F System.map \ 1171 $(if $(strip $(INSTALL_MOD_PATH)), \ 1172 -b $(INSTALL_MOD_PATH) -r) \ 1173 $(KERNELRELEASE); \ 1174 fi 1175 1176PHONY += _emodinst_post 1177_emodinst_post: _emodinst_ 1178 $(call cmd,depmod) 1179 1180clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1181 1182PHONY += $(clean-dirs) clean 1183$(clean-dirs): 1184 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1185 1186clean: rm-dirs := $(MODVERDIR) 1187clean: $(clean-dirs) 1188 $(call cmd,rmdirs) 1189 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1190 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1191 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1192 -type f -print | xargs rm -f 1193 1194help: 1195 @echo ' Building external modules.' 1196 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1197 @echo '' 1198 @echo ' modules - default target, build the module(s)' 1199 @echo ' modules_install - install the module' 1200 @echo ' clean - remove generated files in module directory only' 1201 @echo '' 1202 1203# Dummies... 1204PHONY += prepare scripts 1205prepare: ; 1206scripts: ; 1207endif # KBUILD_EXTMOD 1208 1209# Generate tags for editors 1210# --------------------------------------------------------------------------- 1211 1212#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1213#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1214#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1215 1216ifeq ($(src),$(obj)) 1217__srctree = 1218else 1219__srctree = $(srctree)/ 1220endif 1221 1222ifeq ($(ALLSOURCE_ARCHS),) 1223ifeq ($(ARCH),um) 1224ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1225else 1226ALLINCLUDE_ARCHS := $(ARCH) 1227endif 1228else 1229#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1230ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1231endif 1232 1233ALLSOURCE_ARCHS := $(ARCH) 1234 1235define find-sources 1236 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1237 \( -name include -o -name arch \) -prune -o \ 1238 -name $1 -print; \ 1239 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1240 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1241 -name $1 -print; \ 1242 done ; \ 1243 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1244 -name $1 -print; \ 1245 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1246 \( -name config -o -name 'asm-*' \) -prune \ 1247 -o -name $1 -print; \ 1248 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1249 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1250 -name $1 -print; \ 1251 done ; \ 1252 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1253 -name $1 -print ) 1254endef 1255 1256define all-sources 1257 $(call find-sources,'*.[chS]') 1258endef 1259define all-kconfigs 1260 $(call find-sources,'Kconfig*') 1261endef 1262define all-defconfigs 1263 $(call find-sources,'defconfig') 1264endef 1265 1266quiet_cmd_cscope-file = FILELST cscope.files 1267 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1268 1269quiet_cmd_cscope = MAKE cscope.out 1270 cmd_cscope = cscope -b 1271 1272cscope: FORCE 1273 $(call cmd,cscope-file) 1274 $(call cmd,cscope) 1275 1276quiet_cmd_TAGS = MAKE $@ 1277define cmd_TAGS 1278 rm -f $@; \ 1279 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1280 echo "-I __initdata,__exitdata,__acquires,__releases \ 1281 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1282 --extra=+f --c-kinds=+px"`; \ 1283 $(all-sources) | xargs etags $$ETAGSF -a; \ 1284 if test "x$$ETAGSF" = x; then \ 1285 $(all-kconfigs) | xargs etags -a \ 1286 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1287 $(all-defconfigs) | xargs etags -a \ 1288 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1289 fi 1290endef 1291 1292TAGS: FORCE 1293 $(call cmd,TAGS) 1294 1295 1296quiet_cmd_tags = MAKE $@ 1297define cmd_tags 1298 rm -f $@; \ 1299 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1300 echo "-I __initdata,__exitdata,__acquires,__releases \ 1301 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1302 --extra=+f --c-kinds=+px"`; \ 1303 $(all-sources) | xargs ctags $$CTAGSF -a 1304endef 1305 1306tags: FORCE 1307 $(call cmd,tags) 1308 1309 1310# Scripts to check various things for consistency 1311# --------------------------------------------------------------------------- 1312 1313includecheck: 1314 find * $(RCS_FIND_IGNORE) \ 1315 -name '*.[hcS]' -type f -print | sort \ 1316 | xargs $(PERL) -w scripts/checkincludes.pl 1317 1318versioncheck: 1319 find * $(RCS_FIND_IGNORE) \ 1320 -name '*.[hcS]' -type f -print | sort \ 1321 | xargs $(PERL) -w scripts/checkversion.pl 1322 1323namespacecheck: 1324 $(PERL) $(srctree)/scripts/namespace.pl 1325 1326endif #ifeq ($(config-targets),1) 1327endif #ifeq ($(mixed-targets),1) 1328 1329PHONY += checkstack kernelrelease kernelversion 1330checkstack: 1331 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1332 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1333 1334kernelrelease: 1335 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1336 $(error kernelrelease not valid - run 'make prepare' to update it)) 1337kernelversion: 1338 @echo $(KERNELVERSION) 1339 1340# Single targets 1341# --------------------------------------------------------------------------- 1342# Single targets are compatible with: 1343# - build whith mixed source and output 1344# - build with separate output dir 'make O=...' 1345# - external modules 1346# 1347# target-dir => where to store outputfile 1348# build-dir => directory in kernel source tree to use 1349 1350ifeq ($(KBUILD_EXTMOD),) 1351 build-dir = $(patsubst %/,%,$(dir $@)) 1352 target-dir = $(dir $@) 1353else 1354 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1355 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1356 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1357endif 1358 1359%.s: %.c prepare scripts FORCE 1360 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1361%.i: %.c prepare scripts FORCE 1362 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1363%.o: %.c prepare scripts FORCE 1364 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1365%.lst: %.c prepare scripts FORCE 1366 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1367%.s: %.S prepare scripts FORCE 1368 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1369%.o: %.S prepare scripts FORCE 1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1371%.symtypes: %.c prepare scripts FORCE 1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1373 1374# Modules 1375/ %/: prepare scripts FORCE 1376 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1377 $(build)=$(build-dir) 1378%.ko: prepare scripts FORCE 1379 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1380 $(build)=$(build-dir) $(@:.ko=.o) 1381 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1382 1383# FIXME Should go into a make.lib or something 1384# =========================================================================== 1385 1386quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1387 cmd_rmdirs = rm -rf $(rm-dirs) 1388 1389quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1390 cmd_rmfiles = rm -f $(rm-files) 1391 1392 1393a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1394 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1395 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1396 1397quiet_cmd_as_o_S = AS $@ 1398cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1399 1400# read all saved command lines 1401 1402targets := $(wildcard $(sort $(targets))) 1403cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1404 1405ifneq ($(cmd_files),) 1406 $(cmd_files): ; # Do not try to update included dependency files 1407 include $(cmd_files) 1408endif 1409 1410# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1411# Usage: 1412# $(Q)$(MAKE) $(clean)=dir 1413clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1414 1415endif # skip-makefile 1416 1417PHONY += FORCE 1418FORCE: 1419 1420 1421# Declare the contents of the .PHONY variable as phony. We keep that 1422# information in a variable se we can use it in if_changed and friends. 1423.PHONY: $(PHONY) 1424