1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 18 4EXTRAVERSION = -rc3 5NAME=Crazed Snow-Weasel 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# Do not use make's built-in rules and variables 272# This increases performance and avoid hard-to-debug behavour 273MAKEFLAGS += -rR 274 275# Make variables (CC, etc...) 276 277AS = $(CROSS_COMPILE)as 278LD = $(CROSS_COMPILE)ld 279CC = $(CROSS_COMPILE)gcc 280CPP = $(CC) -E 281AR = $(CROSS_COMPILE)ar 282NM = $(CROSS_COMPILE)nm 283STRIP = $(CROSS_COMPILE)strip 284OBJCOPY = $(CROSS_COMPILE)objcopy 285OBJDUMP = $(CROSS_COMPILE)objdump 286AWK = awk 287GENKSYMS = scripts/genksyms/genksyms 288DEPMOD = /sbin/depmod 289KALLSYMS = scripts/kallsyms 290PERL = perl 291CHECK = sparse 292 293CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 294MODFLAGS = -DMODULE 295CFLAGS_MODULE = $(MODFLAGS) 296AFLAGS_MODULE = $(MODFLAGS) 297LDFLAGS_MODULE = -r 298CFLAGS_KERNEL = 299AFLAGS_KERNEL = 300 301 302# Use LINUXINCLUDE when you must reference the include/ directory. 303# Needed to be compatible with the O= option 304LINUXINCLUDE := -Iinclude \ 305 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 306 -include include/linux/autoconf.h 307 308CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 309 310CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 311 -fno-strict-aliasing -fno-common 312# Force gcc to behave correct even for buggy distributions 313CFLAGS += $(call cc-option, -fno-stack-protector) 314 315AFLAGS := -D__ASSEMBLY__ 316 317# Read KERNELRELEASE from include/config/kernel.release (if it exists) 318KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 319KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 320 321export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 322export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 323export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 324export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 325 326export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 327export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 328export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 329 330# When compiling out-of-tree modules, put MODVERDIR in the module 331# tree rather than in the kernel tree. The kernel tree might 332# even be read-only. 333export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 334 335# Files to ignore in find ... statements 336 337RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 338export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 339 340# =========================================================================== 341# Rules shared between *config targets and build targets 342 343# Basic helpers built in scripts/ 344PHONY += scripts_basic 345scripts_basic: 346 $(Q)$(MAKE) $(build)=scripts/basic 347 348# To avoid any implicit rule to kick in, define an empty command. 349scripts/basic/%: scripts_basic ; 350 351PHONY += outputmakefile 352# outputmakefile generates a Makefile in the output directory, if using a 353# separate output directory. This allows convenient use of make in the 354# output directory. 355outputmakefile: 356ifneq ($(KBUILD_SRC),) 357 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 358 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 359endif 360 361# To make sure we do not include .config for any of the *config targets 362# catch them early, and hand them over to scripts/kconfig/Makefile 363# It is allowed to specify more targets when calling make, including 364# mixing *config targets and build targets. 365# For example 'make oldconfig all'. 366# Detect when mixed targets is specified, and make a second invocation 367# of make so .config is not included in this case either (for *config). 368 369no-dot-config-targets := clean mrproper distclean \ 370 cscope TAGS tags help %docs check% \ 371 include/linux/version.h headers_% \ 372 kernelrelease kernelversion 373 374config-targets := 0 375mixed-targets := 0 376dot-config := 1 377 378ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 379 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 380 dot-config := 0 381 endif 382endif 383 384ifeq ($(KBUILD_EXTMOD),) 385 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 386 config-targets := 1 387 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 388 mixed-targets := 1 389 endif 390 endif 391endif 392 393ifeq ($(mixed-targets),1) 394# =========================================================================== 395# We're called with mixed targets (*config and build targets). 396# Handle them one by one. 397 398%:: FORCE 399 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 400 401else 402ifeq ($(config-targets),1) 403# =========================================================================== 404# *config targets only - make sure prerequisites are updated, and descend 405# in scripts/kconfig to make the *config target 406 407# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 408# KBUILD_DEFCONFIG may point out an alternative default configuration 409# used for 'make defconfig' 410include $(srctree)/arch/$(ARCH)/Makefile 411export KBUILD_DEFCONFIG 412 413config %config: scripts_basic outputmakefile FORCE 414 $(Q)mkdir -p include/linux include/config 415 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 416 417else 418# =========================================================================== 419# Build targets only - this includes vmlinux, arch specific targets, clean 420# targets and others. In general all targets except *config targets. 421 422ifeq ($(KBUILD_EXTMOD),) 423# Additional helpers built in scripts/ 424# Carefully list dependencies so we do not try to build scripts twice 425# in parallel 426PHONY += scripts 427scripts: scripts_basic include/config/auto.conf 428 $(Q)$(MAKE) $(build)=$(@) 429 430# Objects we will link into vmlinux / subdirs we need to visit 431init-y := init/ 432drivers-y := drivers/ sound/ 433net-y := net/ 434libs-y := lib/ 435core-y := usr/ 436endif # KBUILD_EXTMOD 437 438ifeq ($(dot-config),1) 439# In this section, we need .config 440 441# Read in dependencies to all Kconfig* files, make sure to run 442# oldconfig if changes are detected. 443-include include/config/auto.conf.cmd 444-include include/config/auto.conf 445 446# To avoid any implicit rule to kick in, define an empty command 447$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 448 449# If .config is newer than include/config/auto.conf, someone tinkered 450# with it and forgot to run make oldconfig. 451# if auto.conf.cmd is missing then we are probably in a cleaned tree so 452# we execute the config step to be sure to catch updated Kconfig files 453include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 454ifeq ($(KBUILD_EXTMOD),) 455 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 456else 457 $(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it) 458endif 459 460else 461# Dummy target needed, because used as prerequisite 462include/config/auto.conf: ; 463endif 464 465# The all: target is the default when no target is given on the 466# command line. 467# This allow a user to issue only 'make' to build a kernel including modules 468# Defaults vmlinux but it is usually overridden in the arch makefile 469all: vmlinux 470 471ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 472CFLAGS += -Os 473else 474CFLAGS += -O2 475endif 476 477ifdef CONFIG_FRAME_POINTER 478CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 479else 480CFLAGS += -fomit-frame-pointer 481endif 482 483ifdef CONFIG_UNWIND_INFO 484CFLAGS += -fasynchronous-unwind-tables 485endif 486 487ifdef CONFIG_DEBUG_INFO 488CFLAGS += -g 489endif 490 491include $(srctree)/arch/$(ARCH)/Makefile 492 493# arch Makefile may override CC so keep this after arch Makefile is included 494NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 495CHECKFLAGS += $(NOSTDINC_FLAGS) 496 497# warn about C99 declaration after statement 498CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 499 500# disable pointer signed / unsigned warnings in gcc 4.0 501CFLAGS += $(call cc-option,-Wno-pointer-sign,) 502 503# Default kernel image to build when no specific target is given. 504# KBUILD_IMAGE may be overruled on the command line or 505# set in the environment 506# Also any assignments in arch/$(ARCH)/Makefile take precedence over 507# this default value 508export KBUILD_IMAGE ?= vmlinux 509 510# 511# INSTALL_PATH specifies where to place the updated kernel and system map 512# images. Default is /boot, but you can set it to other values 513export INSTALL_PATH ?= /boot 514 515# 516# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 517# relocations required by build roots. This is not defined in the 518# makefile but the argument can be passed to make if needed. 519# 520 521MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 522export MODLIB 523 524# 525# INSTALL_MOD_STRIP, if defined, will cause modules to be 526# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 527# the default option --strip-debug will be used. Otherwise, 528# INSTALL_MOD_STRIP will used as the options to the strip command. 529 530ifdef INSTALL_MOD_STRIP 531ifeq ($(INSTALL_MOD_STRIP),1) 532mod_strip_cmd = $(STRIP) --strip-debug 533else 534mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 535endif # INSTALL_MOD_STRIP=1 536else 537mod_strip_cmd = true 538endif # INSTALL_MOD_STRIP 539export mod_strip_cmd 540 541 542ifeq ($(KBUILD_EXTMOD),) 543core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 544 545vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 546 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 547 $(net-y) $(net-m) $(libs-y) $(libs-m))) 548 549vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 550 $(init-n) $(init-) \ 551 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 552 $(net-n) $(net-) $(libs-n) $(libs-)))) 553 554init-y := $(patsubst %/, %/built-in.o, $(init-y)) 555core-y := $(patsubst %/, %/built-in.o, $(core-y)) 556drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 557net-y := $(patsubst %/, %/built-in.o, $(net-y)) 558libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 559libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 560libs-y := $(libs-y1) $(libs-y2) 561 562# Build vmlinux 563# --------------------------------------------------------------------------- 564# vmlinux is built from the objects selected by $(vmlinux-init) and 565# $(vmlinux-main). Most are built-in.o files from top-level directories 566# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 567# Ordering when linking is important, and $(vmlinux-init) must be first. 568# 569# vmlinux 570# ^ 571# | 572# +-< $(vmlinux-init) 573# | +--< init/version.o + more 574# | 575# +--< $(vmlinux-main) 576# | +--< driver/built-in.o mm/built-in.o + more 577# | 578# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 579# 580# vmlinux version (uname -v) cannot be updated during normal 581# descending-into-subdirs phase since we do not yet know if we need to 582# update vmlinux. 583# Therefore this step is delayed until just before final link of vmlinux - 584# except in the kallsyms case where it is done just before adding the 585# symbols to the kernel. 586# 587# System.map is generated to document addresses of all kernel symbols 588 589vmlinux-init := $(head-y) $(init-y) 590vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 591vmlinux-all := $(vmlinux-init) $(vmlinux-main) 592vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 593 594# Rule to link vmlinux - also used during CONFIG_KALLSYMS 595# May be overridden by arch/$(ARCH)/Makefile 596quiet_cmd_vmlinux__ ?= LD $@ 597 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 598 -T $(vmlinux-lds) $(vmlinux-init) \ 599 --start-group $(vmlinux-main) --end-group \ 600 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 601 602# Generate new vmlinux version 603quiet_cmd_vmlinux_version = GEN .version 604 cmd_vmlinux_version = set -e; \ 605 if [ ! -r .version ]; then \ 606 rm -f .version; \ 607 echo 1 >.version; \ 608 else \ 609 mv .version .old_version; \ 610 expr 0$$(cat .old_version) + 1 >.version; \ 611 fi; \ 612 $(MAKE) $(build)=init 613 614# Generate System.map 615quiet_cmd_sysmap = SYSMAP 616 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 617 618# Link of vmlinux 619# If CONFIG_KALLSYMS is set .version is already updated 620# Generate System.map and verify that the content is consistent 621# Use + in front of the vmlinux_version rule to silent warning with make -j2 622# First command is ':' to allow us to use + in front of the rule 623define rule_vmlinux__ 624 : 625 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 626 627 $(call cmd,vmlinux__) 628 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 629 630 $(Q)$(if $($(quiet)cmd_sysmap), \ 631 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 632 $(cmd_sysmap) $@ System.map; \ 633 if [ $$? -ne 0 ]; then \ 634 rm -f $@; \ 635 /bin/false; \ 636 fi; 637 $(verify_kallsyms) 638endef 639 640 641ifdef CONFIG_KALLSYMS 642# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 643# It's a three stage process: 644# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 645# empty 646# Running kallsyms on that gives us .tmp_kallsyms1.o with 647# the right size - vmlinux version (uname -v) is updated during this step 648# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 649# but due to the added section, some addresses have shifted. 650# From here, we generate a correct .tmp_kallsyms2.o 651# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 652# o Verify that the System.map from vmlinux matches the map from 653# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 654# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 655# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 656# temporary bypass to allow the kernel to be built while the 657# maintainers work out what went wrong with kallsyms. 658 659ifdef CONFIG_KALLSYMS_EXTRA_PASS 660last_kallsyms := 3 661else 662last_kallsyms := 2 663endif 664 665kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 666 667define verify_kallsyms 668 $(Q)$(if $($(quiet)cmd_sysmap), \ 669 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 670 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 671 $(Q)cmp -s System.map .tmp_System.map || \ 672 (echo Inconsistent kallsyms data; \ 673 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 674 rm .tmp_kallsyms* ; /bin/false ) 675endef 676 677# Update vmlinux version before link 678# Use + in front of this rule to silent warning about make -j1 679# First command is ':' to allow us to use + in front of this rule 680cmd_ksym_ld = $(cmd_vmlinux__) 681define rule_ksym_ld 682 : 683 +$(call cmd,vmlinux_version) 684 $(call cmd,vmlinux__) 685 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 686endef 687 688# Generate .S file with all kernel symbols 689quiet_cmd_kallsyms = KSYM $@ 690 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 691 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 692 693.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 694 $(call if_changed_dep,as_o_S) 695 696.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 697 $(call cmd,kallsyms) 698 699# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 700.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 701 $(call if_changed_rule,ksym_ld) 702 703.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 704 $(call if_changed,vmlinux__) 705 706.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 707 $(call if_changed,vmlinux__) 708 709# Needs to visit scripts/ before $(KALLSYMS) can be used. 710$(KALLSYMS): scripts ; 711 712# Generate some data for debugging strange kallsyms problems 713debug_kallsyms: .tmp_map$(last_kallsyms) 714 715.tmp_map%: .tmp_vmlinux% FORCE 716 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 717 718.tmp_map3: .tmp_map2 719 720.tmp_map2: .tmp_map1 721 722endif # ifdef CONFIG_KALLSYMS 723 724# vmlinux image - including updated kernel symbols 725vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 726 $(call if_changed_rule,vmlinux__) 727 $(Q)rm -f .old_version 728 729# The actual objects are generated when descending, 730# make sure no implicit rule kicks in 731$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 732 733# Handle descending into subdirectories listed in $(vmlinux-dirs) 734# Preset locale variables to speed up the build process. Limit locale 735# tweaks to this spot to avoid wrong language settings when running 736# make menuconfig etc. 737# Error messages still appears in the original language 738 739PHONY += $(vmlinux-dirs) 740$(vmlinux-dirs): prepare scripts 741 $(Q)$(MAKE) $(build)=$@ 742 743# Build the kernel release string 744# The KERNELRELEASE is stored in a file named include/config/kernel.release 745# to be used when executing for example make install or make modules_install 746# 747# Take the contents of any files called localversion* and the config 748# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 749# LOCALVERSION from the command line override all of this 750 751nullstring := 752space := $(nullstring) # end of line 753 754___localver = $(objtree)/localversion* $(srctree)/localversion* 755__localver = $(sort $(wildcard $(___localver))) 756# skip backup files (containing '~') 757_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 758 759localver = $(subst $(space),, \ 760 $(shell cat /dev/null $(_localver)) \ 761 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 762 763# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 764# and if the SCM is know a tag from the SCM is appended. 765# The appended tag is determined by the SCM used. 766# 767# Currently, only git is supported. 768# Other SCMs can edit scripts/setlocalversion and add the appropriate 769# checks as needed. 770ifdef CONFIG_LOCALVERSION_AUTO 771 _localver-auto = $(shell $(CONFIG_SHELL) \ 772 $(srctree)/scripts/setlocalversion $(srctree)) 773 localver-auto = $(LOCALVERSION)$(_localver-auto) 774endif 775 776localver-full = $(localver)$(localver-auto) 777 778# Store (new) KERNELRELASE string in include/config/kernel.release 779kernelrelease = $(KERNELVERSION)$(localver-full) 780include/config/kernel.release: include/config/auto.conf FORCE 781 $(Q)rm -f $@ 782 $(Q)echo $(kernelrelease) > $@ 783 784 785# Things we need to do before we recursively start building the kernel 786# or the modules are listed in "prepare". 787# A multi level approach is used. prepareN is processed before prepareN-1. 788# archprepare is used in arch Makefiles and when processed asm symlink, 789# version.h and scripts_basic is processed / created. 790 791# Listed in dependency order 792PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 793 794# prepare-all is deprecated, use prepare as valid replacement 795PHONY += prepare-all 796 797# prepare3 is used to check if we are building in a separate output directory, 798# and if so do: 799# 1) Check that make has not been executed in the kernel src $(srctree) 800# 2) Create the include2 directory, used for the second asm symlink 801prepare3: include/config/kernel.release 802ifneq ($(KBUILD_SRC),) 803 @echo ' Using $(srctree) as source for kernel' 804 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 805 echo " $(srctree) is not clean, please run 'make mrproper'";\ 806 echo " in the '$(srctree)' directory.";\ 807 /bin/false; \ 808 fi; 809 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 810 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 811endif 812 813# prepare2 creates a makefile if using a separate output directory 814prepare2: prepare3 outputmakefile 815 816prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 817 include/asm include/config/auto.conf 818ifneq ($(KBUILD_MODULES),) 819 $(Q)mkdir -p $(MODVERDIR) 820 $(Q)rm -f $(MODVERDIR)/* 821endif 822 823archprepare: prepare1 scripts_basic 824 825prepare0: archprepare FORCE 826 $(Q)$(MAKE) $(build)=. 827 828# All the preparing.. 829prepare prepare-all: prepare0 830 831# Leave this as default for preprocessing vmlinux.lds.S, which is now 832# done in arch/$(ARCH)/kernel/Makefile 833 834export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 835 836# FIXME: The asm symlink changes when $(ARCH) changes. That's 837# hard to detect, but I suppose "make mrproper" is a good idea 838# before switching between archs anyway. 839 840include/asm: 841 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 842 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 843 @ln -fsn asm-$(ARCH) $@ 844 845# Generate some files 846# --------------------------------------------------------------------------- 847 848# KERNELRELEASE can change from a few different places, meaning version.h 849# needs to be updated, so this check is forced on all builds 850 851uts_len := 64 852define filechk_utsrelease.h 853 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 854 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 855 exit 1; \ 856 fi; \ 857 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 858endef 859 860define filechk_version.h 861 (echo \#define LINUX_VERSION_CODE $(shell \ 862 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 863 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 864endef 865 866include/linux/version.h: $(srctree)/Makefile FORCE 867 $(call filechk,version.h) 868 869include/linux/utsrelease.h: include/config/kernel.release FORCE 870 $(call filechk,utsrelease.h) 871 872# --------------------------------------------------------------------------- 873 874PHONY += depend dep 875depend dep: 876 @echo '*** Warning: make $@ is unnecessary now.' 877 878# --------------------------------------------------------------------------- 879# Kernel headers 880INSTALL_HDR_PATH=$(MODLIB)/abi 881export INSTALL_HDR_PATH 882 883PHONY += headers_install 884headers_install: include/linux/version.h 885 $(Q)unifdef -Ux /dev/null 886 $(Q)rm -rf $(INSTALL_HDR_PATH)/include 887 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include 888 889PHONY += headers_check 890headers_check: headers_install 891 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 892 893# --------------------------------------------------------------------------- 894# Modules 895 896ifdef CONFIG_MODULES 897 898# By default, build modules as well 899 900all: modules 901 902# Build modules 903 904PHONY += modules 905modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 906 @echo ' Building modules, stage 2.'; 907 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 908 909 910# Target to prepare building external modules 911PHONY += modules_prepare 912modules_prepare: prepare scripts 913 914# Target to install modules 915PHONY += modules_install 916modules_install: _modinst_ _modinst_post 917 918PHONY += _modinst_ 919_modinst_: 920 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 921 echo "Warning: you may need to install module-init-tools"; \ 922 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 923 sleep 1; \ 924 fi 925 @rm -rf $(MODLIB)/kernel 926 @rm -f $(MODLIB)/source 927 @mkdir -p $(MODLIB)/kernel 928 @ln -s $(srctree) $(MODLIB)/source 929 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 930 rm -f $(MODLIB)/build ; \ 931 ln -s $(objtree) $(MODLIB)/build ; \ 932 fi 933 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 934 935# If System.map exists, run depmod. This deliberately does not have a 936# dependency on System.map since that would run the dependency tree on 937# vmlinux. This depmod is only for convenience to give the initial 938# boot a modules.dep even before / is mounted read-write. However the 939# boot script depmod is the master version. 940ifeq "$(strip $(INSTALL_MOD_PATH))" "" 941depmod_opts := 942else 943depmod_opts := -b $(INSTALL_MOD_PATH) -r 944endif 945PHONY += _modinst_post 946_modinst_post: _modinst_ 947 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 948 949else # CONFIG_MODULES 950 951# Modules not configured 952# --------------------------------------------------------------------------- 953 954modules modules_install: FORCE 955 @echo 956 @echo "The present kernel configuration has modules disabled." 957 @echo "Type 'make config' and enable loadable module support." 958 @echo "Then build a kernel with module support enabled." 959 @echo 960 @exit 1 961 962endif # CONFIG_MODULES 963 964### 965# Cleaning is done on three levels. 966# make clean Delete most generated files 967# Leave enough to build external modules 968# make mrproper Delete the current configuration, and all generated files 969# make distclean Remove editor backup files, patch leftover files and the like 970 971# Directories & files removed with 'make clean' 972CLEAN_DIRS += $(MODVERDIR) 973CLEAN_FILES += vmlinux System.map \ 974 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 975 976# Directories & files removed with 'make mrproper' 977MRPROPER_DIRS += include/config include2 978MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 979 include/linux/autoconf.h include/linux/version.h \ 980 include/linux/utsrelease.h \ 981 Module.symvers tags TAGS cscope* 982 983# clean - Delete most, but leave enough to build external modules 984# 985clean: rm-dirs := $(CLEAN_DIRS) 986clean: rm-files := $(CLEAN_FILES) 987clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 988 989PHONY += $(clean-dirs) clean archclean 990$(clean-dirs): 991 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 992 993clean: archclean $(clean-dirs) 994 $(call cmd,rmdirs) 995 $(call cmd,rmfiles) 996 @find . $(RCS_FIND_IGNORE) \ 997 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 998 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 999 -o -name '*.symtypes' \) \ 1000 -type f -print | xargs rm -f 1001 1002# mrproper - Delete all generated files, including .config 1003# 1004mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1005mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1006mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1007 1008PHONY += $(mrproper-dirs) mrproper archmrproper 1009$(mrproper-dirs): 1010 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1011 1012mrproper: clean archmrproper $(mrproper-dirs) 1013 $(call cmd,rmdirs) 1014 $(call cmd,rmfiles) 1015 1016# distclean 1017# 1018PHONY += distclean 1019 1020distclean: mrproper 1021 @find $(srctree) $(RCS_FIND_IGNORE) \ 1022 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1023 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1024 -o -name '.*.rej' -o -size 0 \ 1025 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1026 -type f -print | xargs rm -f 1027 1028 1029# Packaging of the kernel to various formats 1030# --------------------------------------------------------------------------- 1031# rpm target kept for backward compatibility 1032package-dir := $(srctree)/scripts/package 1033 1034%pkg: include/config/kernel.release FORCE 1035 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1036rpm: include/config/kernel.release FORCE 1037 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1038 1039 1040# Brief documentation of the typical targets used 1041# --------------------------------------------------------------------------- 1042 1043boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1044boards := $(notdir $(boards)) 1045 1046help: 1047 @echo 'Cleaning targets:' 1048 @echo ' clean - remove most generated files but keep the config' 1049 @echo ' mrproper - remove all generated files + config + various backup files' 1050 @echo '' 1051 @echo 'Configuration targets:' 1052 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1053 @echo '' 1054 @echo 'Other generic targets:' 1055 @echo ' all - Build all targets marked with [*]' 1056 @echo '* vmlinux - Build the bare kernel' 1057 @echo '* modules - Build all modules' 1058 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1059 @echo ' dir/ - Build all files in dir and below' 1060 @echo ' dir/file.[ois] - Build specified target only' 1061 @echo ' dir/file.ko - Build module including final link' 1062 @echo ' rpm - Build a kernel as an RPM package' 1063 @echo ' tags/TAGS - Generate tags file for editors' 1064 @echo ' cscope - Generate cscope index' 1065 @echo ' kernelrelease - Output the release version string' 1066 @echo ' kernelversion - Output the version stored in Makefile' 1067 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH' 1068 @echo ' (default: /lib/modules/$$VERSION/abi)' 1069 @echo '' 1070 @echo 'Static analysers' 1071 @echo ' checkstack - Generate a list of stack hogs' 1072 @echo ' namespacecheck - Name space analysis on compiled kernel' 1073 @echo '' 1074 @echo 'Kernel packaging:' 1075 @$(MAKE) $(build)=$(package-dir) help 1076 @echo '' 1077 @echo 'Documentation targets:' 1078 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1079 @echo '' 1080 @echo 'Architecture specific targets ($(ARCH)):' 1081 @$(if $(archhelp),$(archhelp),\ 1082 echo ' No architecture specific help defined for $(ARCH)') 1083 @echo '' 1084 @$(if $(boards), \ 1085 $(foreach b, $(boards), \ 1086 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1087 echo '') 1088 1089 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1090 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1091 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1092 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1093 @echo '' 1094 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1095 @echo 'For further info see the ./README file' 1096 1097 1098# Documentation targets 1099# --------------------------------------------------------------------------- 1100%docs: scripts_basic FORCE 1101 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1102 1103else # KBUILD_EXTMOD 1104 1105### 1106# External module support. 1107# When building external modules the kernel used as basis is considered 1108# read-only, and no consistency checks are made and the make 1109# system is not used on the basis kernel. If updates are required 1110# in the basis kernel ordinary make commands (without M=...) must 1111# be used. 1112# 1113# The following are the only valid targets when building external 1114# modules. 1115# make M=dir clean Delete all automatically generated files 1116# make M=dir modules Make all modules in specified dir 1117# make M=dir Same as 'make M=dir modules' 1118# make M=dir modules_install 1119# Install the modules built in the module directory 1120# Assumes install directory is already created 1121 1122# We are always building modules 1123KBUILD_MODULES := 1 1124PHONY += crmodverdir 1125crmodverdir: 1126 $(Q)mkdir -p $(MODVERDIR) 1127 $(Q)rm -f $(MODVERDIR)/* 1128 1129PHONY += $(objtree)/Module.symvers 1130$(objtree)/Module.symvers: 1131 @test -e $(objtree)/Module.symvers || ( \ 1132 echo; \ 1133 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1134 echo " is missing; modules will have no dependencies and modversions."; \ 1135 echo ) 1136 1137module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1138PHONY += $(module-dirs) modules 1139$(module-dirs): crmodverdir $(objtree)/Module.symvers 1140 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1141 1142modules: $(module-dirs) 1143 @echo ' Building modules, stage 2.'; 1144 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1145 1146PHONY += modules_install 1147modules_install: _emodinst_ _emodinst_post 1148 1149install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1150PHONY += _emodinst_ 1151_emodinst_: 1152 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1153 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1154 1155# Run depmod only is we have System.map and depmod is executable 1156quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1157 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1158 $(DEPMOD) -ae -F System.map \ 1159 $(if $(strip $(INSTALL_MOD_PATH)), \ 1160 -b $(INSTALL_MOD_PATH) -r) \ 1161 $(KERNELRELEASE); \ 1162 fi 1163 1164PHONY += _emodinst_post 1165_emodinst_post: _emodinst_ 1166 $(call cmd,depmod) 1167 1168clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1169 1170PHONY += $(clean-dirs) clean 1171$(clean-dirs): 1172 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1173 1174clean: rm-dirs := $(MODVERDIR) 1175clean: $(clean-dirs) 1176 $(call cmd,rmdirs) 1177 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1178 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1179 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1180 -type f -print | xargs rm -f 1181 1182help: 1183 @echo ' Building external modules.' 1184 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1185 @echo '' 1186 @echo ' modules - default target, build the module(s)' 1187 @echo ' modules_install - install the module' 1188 @echo ' clean - remove generated files in module directory only' 1189 @echo '' 1190 1191# Dummies... 1192PHONY += prepare scripts 1193prepare: ; 1194scripts: ; 1195endif # KBUILD_EXTMOD 1196 1197# Generate tags for editors 1198# --------------------------------------------------------------------------- 1199 1200#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1201#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1202#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1203 1204ifeq ($(src),$(obj)) 1205__srctree = 1206else 1207__srctree = $(srctree)/ 1208endif 1209 1210ifeq ($(ALLSOURCE_ARCHS),) 1211ifeq ($(ARCH),um) 1212ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1213else 1214ALLINCLUDE_ARCHS := $(ARCH) 1215endif 1216else 1217#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1218ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1219endif 1220 1221ALLSOURCE_ARCHS := $(ARCH) 1222 1223define find-sources 1224 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1225 \( -name include -o -name arch \) -prune -o \ 1226 -name $1 -print; \ 1227 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1228 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1229 -name $1 -print; \ 1230 done ; \ 1231 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1232 -name $1 -print; \ 1233 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1234 \( -name config -o -name 'asm-*' \) -prune \ 1235 -o -name $1 -print; \ 1236 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1237 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1238 -name $1 -print; \ 1239 done ; \ 1240 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1241 -name $1 -print ) 1242endef 1243 1244define all-sources 1245 $(call find-sources,'*.[chS]') 1246endef 1247define all-kconfigs 1248 $(call find-sources,'Kconfig*') 1249endef 1250define all-defconfigs 1251 $(call find-sources,'defconfig') 1252endef 1253 1254quiet_cmd_cscope-file = FILELST cscope.files 1255 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1256 1257quiet_cmd_cscope = MAKE cscope.out 1258 cmd_cscope = cscope -b 1259 1260cscope: FORCE 1261 $(call cmd,cscope-file) 1262 $(call cmd,cscope) 1263 1264quiet_cmd_TAGS = MAKE $@ 1265define cmd_TAGS 1266 rm -f $@; \ 1267 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1268 echo "-I __initdata,__exitdata,__acquires,__releases \ 1269 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1270 --extra=+f --c-kinds=+px"`; \ 1271 $(all-sources) | xargs etags $$ETAGSF -a; \ 1272 if test "x$$ETAGSF" = x; then \ 1273 $(all-kconfigs) | xargs etags -a \ 1274 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1275 $(all-defconfigs) | xargs etags -a \ 1276 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1277 fi 1278endef 1279 1280TAGS: FORCE 1281 $(call cmd,TAGS) 1282 1283 1284quiet_cmd_tags = MAKE $@ 1285define cmd_tags 1286 rm -f $@; \ 1287 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1288 echo "-I __initdata,__exitdata,__acquires,__releases \ 1289 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1290 --extra=+f --c-kinds=+px"`; \ 1291 $(all-sources) | xargs ctags $$CTAGSF -a 1292endef 1293 1294tags: FORCE 1295 $(call cmd,tags) 1296 1297 1298# Scripts to check various things for consistency 1299# --------------------------------------------------------------------------- 1300 1301includecheck: 1302 find * $(RCS_FIND_IGNORE) \ 1303 -name '*.[hcS]' -type f -print | sort \ 1304 | xargs $(PERL) -w scripts/checkincludes.pl 1305 1306versioncheck: 1307 find * $(RCS_FIND_IGNORE) \ 1308 -name '*.[hcS]' -type f -print | sort \ 1309 | xargs $(PERL) -w scripts/checkversion.pl 1310 1311namespacecheck: 1312 $(PERL) $(srctree)/scripts/namespace.pl 1313 1314endif #ifeq ($(config-targets),1) 1315endif #ifeq ($(mixed-targets),1) 1316 1317PHONY += checkstack kernelrelease kernelversion 1318checkstack: 1319 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1320 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1321 1322kernelrelease: 1323 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1324 $(error kernelrelease not valid - run 'make prepare' to update it)) 1325kernelversion: 1326 @echo $(KERNELVERSION) 1327 1328# Single targets 1329# --------------------------------------------------------------------------- 1330# Single targets are compatible with: 1331# - build whith mixed source and output 1332# - build with separate output dir 'make O=...' 1333# - external modules 1334# 1335# target-dir => where to store outputfile 1336# build-dir => directory in kernel source tree to use 1337 1338ifeq ($(KBUILD_EXTMOD),) 1339 build-dir = $(patsubst %/,%,$(dir $@)) 1340 target-dir = $(dir $@) 1341else 1342 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1343 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1344 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1345endif 1346 1347%.s: %.c prepare scripts FORCE 1348 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1349%.i: %.c prepare scripts FORCE 1350 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1351%.o: %.c prepare scripts FORCE 1352 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1353%.lst: %.c prepare scripts FORCE 1354 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1355%.s: %.S prepare scripts FORCE 1356 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1357%.o: %.S prepare scripts FORCE 1358 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1359%.symtypes: %.c prepare scripts FORCE 1360 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1361 1362# Modules 1363/ %/: prepare scripts FORCE 1364 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1365 $(build)=$(build-dir) 1366%.ko: prepare scripts FORCE 1367 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1368 $(build)=$(build-dir) $(@:.ko=.o) 1369 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1370 1371# FIXME Should go into a make.lib or something 1372# =========================================================================== 1373 1374quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1375 cmd_rmdirs = rm -rf $(rm-dirs) 1376 1377quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1378 cmd_rmfiles = rm -f $(rm-files) 1379 1380 1381a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1382 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1383 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1384 1385quiet_cmd_as_o_S = AS $@ 1386cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1387 1388# read all saved command lines 1389 1390targets := $(wildcard $(sort $(targets))) 1391cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1392 1393ifneq ($(cmd_files),) 1394 $(cmd_files): ; # Do not try to update included dependency files 1395 include $(cmd_files) 1396endif 1397 1398# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1399# Usage: 1400# $(Q)$(MAKE) $(clean)=dir 1401clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1402 1403endif # skip-makefile 1404 1405PHONY += FORCE 1406FORCE: 1407 1408 1409# Declare the contents of the .PHONY variable as phony. We keep that 1410# information in a variable se we can use it in if_changed and friends. 1411.PHONY: $(PHONY) 1412