1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 18 4EXTRAVERSION = 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# 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 312AFLAGS := -D__ASSEMBLY__ 313 314# Read KERNELRELEASE from include/config/kernel.release (if it exists) 315KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 316KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 317 318export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 319export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 320export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 321export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 322 323export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 324export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 325export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 326 327# When compiling out-of-tree modules, put MODVERDIR in the module 328# tree rather than in the kernel tree. The kernel tree might 329# even be read-only. 330export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 331 332# Files to ignore in find ... statements 333 334RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 335export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 336 337# =========================================================================== 338# Rules shared between *config targets and build targets 339 340# Basic helpers built in scripts/ 341PHONY += scripts_basic 342scripts_basic: 343 $(Q)$(MAKE) $(build)=scripts/basic 344 345# To avoid any implicit rule to kick in, define an empty command. 346scripts/basic/%: scripts_basic ; 347 348PHONY += outputmakefile 349# outputmakefile generates a Makefile in the output directory, if using a 350# separate output directory. This allows convenient use of make in the 351# output directory. 352outputmakefile: 353ifneq ($(KBUILD_SRC),) 354 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 355 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 356endif 357 358# To make sure we do not include .config for any of the *config targets 359# catch them early, and hand them over to scripts/kconfig/Makefile 360# It is allowed to specify more targets when calling make, including 361# mixing *config targets and build targets. 362# For example 'make oldconfig all'. 363# Detect when mixed targets is specified, and make a second invocation 364# of make so .config is not included in this case either (for *config). 365 366no-dot-config-targets := clean mrproper distclean \ 367 cscope TAGS tags help %docs check% \ 368 include/linux/version.h headers_% \ 369 kernelrelease kernelversion 370 371config-targets := 0 372mixed-targets := 0 373dot-config := 1 374 375ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 376 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 377 dot-config := 0 378 endif 379endif 380 381ifeq ($(KBUILD_EXTMOD),) 382 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 383 config-targets := 1 384 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 385 mixed-targets := 1 386 endif 387 endif 388endif 389 390ifeq ($(mixed-targets),1) 391# =========================================================================== 392# We're called with mixed targets (*config and build targets). 393# Handle them one by one. 394 395%:: FORCE 396 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 397 398else 399ifeq ($(config-targets),1) 400# =========================================================================== 401# *config targets only - make sure prerequisites are updated, and descend 402# in scripts/kconfig to make the *config target 403 404# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 405# KBUILD_DEFCONFIG may point out an alternative default configuration 406# used for 'make defconfig' 407include $(srctree)/arch/$(ARCH)/Makefile 408export KBUILD_DEFCONFIG 409 410config %config: scripts_basic outputmakefile FORCE 411 $(Q)mkdir -p include/linux include/config 412 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 413 414else 415# =========================================================================== 416# Build targets only - this includes vmlinux, arch specific targets, clean 417# targets and others. In general all targets except *config targets. 418 419ifeq ($(KBUILD_EXTMOD),) 420# Additional helpers built in scripts/ 421# Carefully list dependencies so we do not try to build scripts twice 422# in parallel 423PHONY += scripts 424scripts: scripts_basic include/config/auto.conf 425 $(Q)$(MAKE) $(build)=$(@) 426 427# Objects we will link into vmlinux / subdirs we need to visit 428init-y := init/ 429drivers-y := drivers/ sound/ 430net-y := net/ 431libs-y := lib/ 432core-y := usr/ 433endif # KBUILD_EXTMOD 434 435ifeq ($(dot-config),1) 436# Read in config 437-include include/config/auto.conf 438 439ifeq ($(KBUILD_EXTMOD),) 440# Read in dependencies to all Kconfig* files, make sure to run 441# oldconfig if changes are detected. 442-include include/config/auto.conf.cmd 443 444# To avoid any implicit rule to kick in, define an empty command 445$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 446 447# If .config is newer than include/config/auto.conf, someone tinkered 448# with it and forgot to run make oldconfig. 449# if auto.conf.cmd is missing then we are probably in a cleaned tree so 450# we execute the config step to be sure to catch updated Kconfig files 451include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 452 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 453else 454# external modules needs include/linux/autoconf.h and include/config/auto.conf 455# but do not care if they are up-to-date. Use auto.conf to trigger the test 456PHONY += include/config/auto.conf 457 458include/config/auto.conf: 459 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 460 echo; \ 461 echo " ERROR: Kernel configuration is invalid."; \ 462 echo " include/linux/autoconf.h or $@ are missing."; \ 463 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 464 echo; \ 465 /bin/false) 466 467endif # KBUILD_EXTMOD 468 469else 470# Dummy target needed, because used as prerequisite 471include/config/auto.conf: ; 472endif # $(dot-config) 473 474# The all: target is the default when no target is given on the 475# command line. 476# This allow a user to issue only 'make' to build a kernel including modules 477# Defaults vmlinux but it is usually overridden in the arch makefile 478all: vmlinux 479 480ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 481CFLAGS += -Os 482else 483CFLAGS += -O2 484endif 485 486include $(srctree)/arch/$(ARCH)/Makefile 487 488ifdef CONFIG_FRAME_POINTER 489CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 490else 491CFLAGS += -fomit-frame-pointer 492endif 493 494ifdef CONFIG_UNWIND_INFO 495CFLAGS += -fasynchronous-unwind-tables 496endif 497 498ifdef CONFIG_DEBUG_INFO 499CFLAGS += -g 500endif 501 502# Force gcc to behave correct even for buggy distributions 503CFLAGS += $(call cc-option, -fno-stack-protector) 504 505# arch Makefile may override CC so keep this after arch Makefile is included 506NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 507CHECKFLAGS += $(NOSTDINC_FLAGS) 508 509# warn about C99 declaration after statement 510CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 511 512# disable pointer signed / unsigned warnings in gcc 4.0 513CFLAGS += $(call cc-option,-Wno-pointer-sign,) 514 515# Default kernel image to build when no specific target is given. 516# KBUILD_IMAGE may be overruled on the command line or 517# set in the environment 518# Also any assignments in arch/$(ARCH)/Makefile take precedence over 519# this default value 520export KBUILD_IMAGE ?= vmlinux 521 522# 523# INSTALL_PATH specifies where to place the updated kernel and system map 524# images. Default is /boot, but you can set it to other values 525export INSTALL_PATH ?= /boot 526 527# 528# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 529# relocations required by build roots. This is not defined in the 530# makefile but the argument can be passed to make if needed. 531# 532 533MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 534export MODLIB 535 536# 537# INSTALL_MOD_STRIP, if defined, will cause modules to be 538# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 539# the default option --strip-debug will be used. Otherwise, 540# INSTALL_MOD_STRIP will used as the options to the strip command. 541 542ifdef INSTALL_MOD_STRIP 543ifeq ($(INSTALL_MOD_STRIP),1) 544mod_strip_cmd = $(STRIP) --strip-debug 545else 546mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 547endif # INSTALL_MOD_STRIP=1 548else 549mod_strip_cmd = true 550endif # INSTALL_MOD_STRIP 551export mod_strip_cmd 552 553 554ifeq ($(KBUILD_EXTMOD),) 555core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 556 557vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 558 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 559 $(net-y) $(net-m) $(libs-y) $(libs-m))) 560 561vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 562 $(init-n) $(init-) \ 563 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 564 $(net-n) $(net-) $(libs-n) $(libs-)))) 565 566init-y := $(patsubst %/, %/built-in.o, $(init-y)) 567core-y := $(patsubst %/, %/built-in.o, $(core-y)) 568drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 569net-y := $(patsubst %/, %/built-in.o, $(net-y)) 570libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 571libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 572libs-y := $(libs-y1) $(libs-y2) 573 574# Build vmlinux 575# --------------------------------------------------------------------------- 576# vmlinux is built from the objects selected by $(vmlinux-init) and 577# $(vmlinux-main). Most are built-in.o files from top-level directories 578# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 579# Ordering when linking is important, and $(vmlinux-init) must be first. 580# 581# vmlinux 582# ^ 583# | 584# +-< $(vmlinux-init) 585# | +--< init/version.o + more 586# | 587# +--< $(vmlinux-main) 588# | +--< driver/built-in.o mm/built-in.o + more 589# | 590# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 591# 592# vmlinux version (uname -v) cannot be updated during normal 593# descending-into-subdirs phase since we do not yet know if we need to 594# update vmlinux. 595# Therefore this step is delayed until just before final link of vmlinux - 596# except in the kallsyms case where it is done just before adding the 597# symbols to the kernel. 598# 599# System.map is generated to document addresses of all kernel symbols 600 601vmlinux-init := $(head-y) $(init-y) 602vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 603vmlinux-all := $(vmlinux-init) $(vmlinux-main) 604vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 605 606# Rule to link vmlinux - also used during CONFIG_KALLSYMS 607# May be overridden by arch/$(ARCH)/Makefile 608quiet_cmd_vmlinux__ ?= LD $@ 609 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 610 -T $(vmlinux-lds) $(vmlinux-init) \ 611 --start-group $(vmlinux-main) --end-group \ 612 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 613 614# Generate new vmlinux version 615quiet_cmd_vmlinux_version = GEN .version 616 cmd_vmlinux_version = set -e; \ 617 if [ ! -r .version ]; then \ 618 rm -f .version; \ 619 echo 1 >.version; \ 620 else \ 621 mv .version .old_version; \ 622 expr 0$$(cat .old_version) + 1 >.version; \ 623 fi; \ 624 $(MAKE) $(build)=init 625 626# Generate System.map 627quiet_cmd_sysmap = SYSMAP 628 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 629 630# Link of vmlinux 631# If CONFIG_KALLSYMS is set .version is already updated 632# Generate System.map and verify that the content is consistent 633# Use + in front of the vmlinux_version rule to silent warning with make -j2 634# First command is ':' to allow us to use + in front of the rule 635define rule_vmlinux__ 636 : 637 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 638 639 $(call cmd,vmlinux__) 640 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 641 642 $(Q)$(if $($(quiet)cmd_sysmap), \ 643 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 644 $(cmd_sysmap) $@ System.map; \ 645 if [ $$? -ne 0 ]; then \ 646 rm -f $@; \ 647 /bin/false; \ 648 fi; 649 $(verify_kallsyms) 650endef 651 652 653ifdef CONFIG_KALLSYMS 654# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 655# It's a three stage process: 656# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 657# empty 658# Running kallsyms on that gives us .tmp_kallsyms1.o with 659# the right size - vmlinux version (uname -v) is updated during this step 660# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 661# but due to the added section, some addresses have shifted. 662# From here, we generate a correct .tmp_kallsyms2.o 663# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 664# o Verify that the System.map from vmlinux matches the map from 665# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 666# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 667# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 668# temporary bypass to allow the kernel to be built while the 669# maintainers work out what went wrong with kallsyms. 670 671ifdef CONFIG_KALLSYMS_EXTRA_PASS 672last_kallsyms := 3 673else 674last_kallsyms := 2 675endif 676 677kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 678 679define verify_kallsyms 680 $(Q)$(if $($(quiet)cmd_sysmap), \ 681 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 682 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 683 $(Q)cmp -s System.map .tmp_System.map || \ 684 (echo Inconsistent kallsyms data; \ 685 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 686 rm .tmp_kallsyms* ; /bin/false ) 687endef 688 689# Update vmlinux version before link 690# Use + in front of this rule to silent warning about make -j1 691# First command is ':' to allow us to use + in front of this rule 692cmd_ksym_ld = $(cmd_vmlinux__) 693define rule_ksym_ld 694 : 695 +$(call cmd,vmlinux_version) 696 $(call cmd,vmlinux__) 697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 698endef 699 700# Generate .S file with all kernel symbols 701quiet_cmd_kallsyms = KSYM $@ 702 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 703 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 704 705.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 706 $(call if_changed_dep,as_o_S) 707 708.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 709 $(call cmd,kallsyms) 710 711# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 712.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 713 $(call if_changed_rule,ksym_ld) 714 715.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 716 $(call if_changed,vmlinux__) 717 718.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 719 $(call if_changed,vmlinux__) 720 721# Needs to visit scripts/ before $(KALLSYMS) can be used. 722$(KALLSYMS): scripts ; 723 724# Generate some data for debugging strange kallsyms problems 725debug_kallsyms: .tmp_map$(last_kallsyms) 726 727.tmp_map%: .tmp_vmlinux% FORCE 728 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 729 730.tmp_map3: .tmp_map2 731 732.tmp_map2: .tmp_map1 733 734endif # ifdef CONFIG_KALLSYMS 735 736# vmlinux image - including updated kernel symbols 737vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 738 $(call if_changed_rule,vmlinux__) 739 $(Q)rm -f .old_version 740 741# The actual objects are generated when descending, 742# make sure no implicit rule kicks in 743$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 744 745# Handle descending into subdirectories listed in $(vmlinux-dirs) 746# Preset locale variables to speed up the build process. Limit locale 747# tweaks to this spot to avoid wrong language settings when running 748# make menuconfig etc. 749# Error messages still appears in the original language 750 751PHONY += $(vmlinux-dirs) 752$(vmlinux-dirs): prepare scripts 753 $(Q)$(MAKE) $(build)=$@ 754 755# Build the kernel release string 756# The KERNELRELEASE is stored in a file named include/config/kernel.release 757# to be used when executing for example make install or make modules_install 758# 759# Take the contents of any files called localversion* and the config 760# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 761# LOCALVERSION from the command line override all of this 762 763nullstring := 764space := $(nullstring) # end of line 765 766___localver = $(objtree)/localversion* $(srctree)/localversion* 767__localver = $(sort $(wildcard $(___localver))) 768# skip backup files (containing '~') 769_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 770 771localver = $(subst $(space),, \ 772 $(shell cat /dev/null $(_localver)) \ 773 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 774 775# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 776# and if the SCM is know a tag from the SCM is appended. 777# The appended tag is determined by the SCM used. 778# 779# Currently, only git is supported. 780# Other SCMs can edit scripts/setlocalversion and add the appropriate 781# checks as needed. 782ifdef CONFIG_LOCALVERSION_AUTO 783 _localver-auto = $(shell $(CONFIG_SHELL) \ 784 $(srctree)/scripts/setlocalversion $(srctree)) 785 localver-auto = $(LOCALVERSION)$(_localver-auto) 786endif 787 788localver-full = $(localver)$(localver-auto) 789 790# Store (new) KERNELRELASE string in include/config/kernel.release 791kernelrelease = $(KERNELVERSION)$(localver-full) 792include/config/kernel.release: include/config/auto.conf FORCE 793 $(Q)rm -f $@ 794 $(Q)echo $(kernelrelease) > $@ 795 796 797# Things we need to do before we recursively start building the kernel 798# or the modules are listed in "prepare". 799# A multi level approach is used. prepareN is processed before prepareN-1. 800# archprepare is used in arch Makefiles and when processed asm symlink, 801# version.h and scripts_basic is processed / created. 802 803# Listed in dependency order 804PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 805 806# prepare-all is deprecated, use prepare as valid replacement 807PHONY += prepare-all 808 809# prepare3 is used to check if we are building in a separate output directory, 810# and if so do: 811# 1) Check that make has not been executed in the kernel src $(srctree) 812# 2) Create the include2 directory, used for the second asm symlink 813prepare3: include/config/kernel.release 814ifneq ($(KBUILD_SRC),) 815 @echo ' Using $(srctree) as source for kernel' 816 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 817 echo " $(srctree) is not clean, please run 'make mrproper'";\ 818 echo " in the '$(srctree)' directory.";\ 819 /bin/false; \ 820 fi; 821 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 822 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 823endif 824 825# prepare2 creates a makefile if using a separate output directory 826prepare2: prepare3 outputmakefile 827 828prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 829 include/asm include/config/auto.conf 830ifneq ($(KBUILD_MODULES),) 831 $(Q)mkdir -p $(MODVERDIR) 832 $(Q)rm -f $(MODVERDIR)/* 833endif 834 835archprepare: prepare1 scripts_basic 836 837prepare0: archprepare FORCE 838 $(Q)$(MAKE) $(build)=. 839 840# All the preparing.. 841prepare prepare-all: prepare0 842 843# Leave this as default for preprocessing vmlinux.lds.S, which is now 844# done in arch/$(ARCH)/kernel/Makefile 845 846export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 847 848# FIXME: The asm symlink changes when $(ARCH) changes. That's 849# hard to detect, but I suppose "make mrproper" is a good idea 850# before switching between archs anyway. 851 852include/asm: 853 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 854 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 855 @ln -fsn asm-$(ARCH) $@ 856 857# Generate some files 858# --------------------------------------------------------------------------- 859 860# KERNELRELEASE can change from a few different places, meaning version.h 861# needs to be updated, so this check is forced on all builds 862 863uts_len := 64 864define filechk_utsrelease.h 865 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 866 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 867 exit 1; \ 868 fi; \ 869 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 870endef 871 872define filechk_version.h 873 (echo \#define LINUX_VERSION_CODE $(shell \ 874 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 875 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 876endef 877 878include/linux/version.h: $(srctree)/Makefile FORCE 879 $(call filechk,version.h) 880 881include/linux/utsrelease.h: include/config/kernel.release FORCE 882 $(call filechk,utsrelease.h) 883 884# --------------------------------------------------------------------------- 885 886PHONY += depend dep 887depend dep: 888 @echo '*** Warning: make $@ is unnecessary now.' 889 890# --------------------------------------------------------------------------- 891# Kernel headers 892INSTALL_HDR_PATH=$(objtree)/usr 893export INSTALL_HDR_PATH 894 895PHONY += headers_install 896headers_install: include/linux/version.h 897 $(Q)unifdef -Ux /dev/null 898 $(Q)rm -rf $(INSTALL_HDR_PATH)/include 899 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include 900 901PHONY += headers_check 902headers_check: headers_install 903 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 904 905# --------------------------------------------------------------------------- 906# Modules 907 908ifdef CONFIG_MODULES 909 910# By default, build modules as well 911 912all: modules 913 914# Build modules 915 916PHONY += modules 917modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 918 @echo ' Building modules, stage 2.'; 919 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 920 921 922# Target to prepare building external modules 923PHONY += modules_prepare 924modules_prepare: prepare scripts 925 926# Target to install modules 927PHONY += modules_install 928modules_install: _modinst_ _modinst_post 929 930PHONY += _modinst_ 931_modinst_: 932 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 933 echo "Warning: you may need to install module-init-tools"; \ 934 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 935 sleep 1; \ 936 fi 937 @rm -rf $(MODLIB)/kernel 938 @rm -f $(MODLIB)/source 939 @mkdir -p $(MODLIB)/kernel 940 @ln -s $(srctree) $(MODLIB)/source 941 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 942 rm -f $(MODLIB)/build ; \ 943 ln -s $(objtree) $(MODLIB)/build ; \ 944 fi 945 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 946 947# If System.map exists, run depmod. This deliberately does not have a 948# dependency on System.map since that would run the dependency tree on 949# vmlinux. This depmod is only for convenience to give the initial 950# boot a modules.dep even before / is mounted read-write. However the 951# boot script depmod is the master version. 952ifeq "$(strip $(INSTALL_MOD_PATH))" "" 953depmod_opts := 954else 955depmod_opts := -b $(INSTALL_MOD_PATH) -r 956endif 957PHONY += _modinst_post 958_modinst_post: _modinst_ 959 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 960 961else # CONFIG_MODULES 962 963# Modules not configured 964# --------------------------------------------------------------------------- 965 966modules modules_install: FORCE 967 @echo 968 @echo "The present kernel configuration has modules disabled." 969 @echo "Type 'make config' and enable loadable module support." 970 @echo "Then build a kernel with module support enabled." 971 @echo 972 @exit 1 973 974endif # CONFIG_MODULES 975 976### 977# Cleaning is done on three levels. 978# make clean Delete most generated files 979# Leave enough to build external modules 980# make mrproper Delete the current configuration, and all generated files 981# make distclean Remove editor backup files, patch leftover files and the like 982 983# Directories & files removed with 'make clean' 984CLEAN_DIRS += $(MODVERDIR) 985CLEAN_FILES += vmlinux System.map \ 986 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 987 988# Directories & files removed with 'make mrproper' 989MRPROPER_DIRS += include/config include2 usr/include 990MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 991 include/linux/autoconf.h include/linux/version.h \ 992 include/linux/utsrelease.h \ 993 Module.symvers tags TAGS cscope* 994 995# clean - Delete most, but leave enough to build external modules 996# 997clean: rm-dirs := $(CLEAN_DIRS) 998clean: rm-files := $(CLEAN_FILES) 999clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1000
1001PHONY += $(clean-dirs) clean archclean 1002$(clean-dirs): 1003 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1004 1005clean: archclean $(clean-dirs) 1006 $(call cmd,rmdirs) 1007 $(call cmd,rmfiles) 1008 @find . $(RCS_FIND_IGNORE) \ 1009 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1010 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1011 -o -name '*.symtypes' \) \ 1012 -type f -print | xargs rm -f 1013 1014# mrproper - Delete all generated files, including .config 1015# 1016mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1017mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1018mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1019 1020PHONY += $(mrproper-dirs) mrproper archmrproper 1021$(mrproper-dirs): 1022 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1023 1024mrproper: clean archmrproper $(mrproper-dirs) 1025 $(call cmd,rmdirs) 1026 $(call cmd,rmfiles) 1027 1028# distclean 1029# 1030PHONY += distclean 1031 1032distclean: mrproper 1033 @find $(srctree) $(RCS_FIND_IGNORE) \ 1034 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1035 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1036 -o -name '.*.rej' -o -size 0 \ 1037 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1038 -type f -print | xargs rm -f 1039 1040 1041# Packaging of the kernel to various formats 1042# --------------------------------------------------------------------------- 1043# rpm target kept for backward compatibility 1044package-dir := $(srctree)/scripts/package 1045 1046%pkg: include/config/kernel.release FORCE 1047 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1048rpm: include/config/kernel.release FORCE 1049 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1050 1051 1052# Brief documentation of the typical targets used 1053# --------------------------------------------------------------------------- 1054 1055boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1056boards := $(notdir $(boards)) 1057 1058help: 1059 @echo 'Cleaning targets:' 1060 @echo ' clean - remove most generated files but keep the config' 1061 @echo ' mrproper - remove all generated files + config + various backup files' 1062 @echo '' 1063 @echo 'Configuration targets:' 1064 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1065 @echo '' 1066 @echo 'Other generic targets:' 1067 @echo ' all - Build all targets marked with [*]' 1068 @echo '* vmlinux - Build the bare kernel' 1069 @echo '* modules - Build all modules' 1070 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1071 @echo ' dir/ - Build all files in dir and below' 1072 @echo ' dir/file.[ois] - Build specified target only' 1073 @echo ' dir/file.ko - Build module including final link' 1074 @echo ' rpm - Build a kernel as an RPM package' 1075 @echo ' tags/TAGS - Generate tags file for editors' 1076 @echo ' cscope - Generate cscope index' 1077 @echo ' kernelrelease - Output the release version string' 1078 @echo ' kernelversion - Output the version stored in Makefile' 1079 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH' 1080 @echo ' (default: $(INSTALL_HDR_PATH))' 1081 @echo '' 1082 @echo 'Static analysers' 1083 @echo ' checkstack - Generate a list of stack hogs' 1084 @echo ' namespacecheck - Name space analysis on compiled kernel' 1085 @echo ' headers_check - Sanity check on exported headers' 1086 @echo '' 1087 @echo 'Kernel packaging:' 1088 @$(MAKE) $(build)=$(package-dir) help 1089 @echo '' 1090 @echo 'Documentation targets:' 1091 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1092 @echo '' 1093 @echo 'Architecture specific targets ($(ARCH)):' 1094 @$(if $(archhelp),$(archhelp),\ 1095 echo ' No architecture specific help defined for $(ARCH)') 1096 @echo '' 1097 @$(if $(boards), \ 1098 $(foreach b, $(boards), \ 1099 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1100 echo '') 1101 1102 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1103 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1104 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1105 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1106 @echo '' 1107 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1108 @echo 'For further info see the ./README file' 1109 1110 1111# Documentation targets 1112# --------------------------------------------------------------------------- 1113%docs: scripts_basic FORCE 1114 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1115 1116else # KBUILD_EXTMOD 1117 1118### 1119# External module support. 1120# When building external modules the kernel used as basis is considered 1121# read-only, and no consistency checks are made and the make 1122# system is not used on the basis kernel. If updates are required 1123# in the basis kernel ordinary make commands (without M=...) must 1124# be used. 1125# 1126# The following are the only valid targets when building external 1127# modules. 1128# make M=dir clean Delete all automatically generated files 1129# make M=dir modules Make all modules in specified dir 1130# make M=dir Same as 'make M=dir modules' 1131# make M=dir modules_install 1132# Install the modules built in the module directory 1133# Assumes install directory is already created 1134 1135# We are always building modules 1136KBUILD_MODULES := 1 1137PHONY += crmodverdir 1138crmodverdir: 1139 $(Q)mkdir -p $(MODVERDIR) 1140 $(Q)rm -f $(MODVERDIR)/* 1141 1142PHONY += $(objtree)/Module.symvers 1143$(objtree)/Module.symvers: 1144 @test -e $(objtree)/Module.symvers || ( \ 1145 echo; \ 1146 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1147 echo " is missing; modules will have no dependencies and modversions."; \ 1148 echo ) 1149 1150module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1151PHONY += $(module-dirs) modules 1152$(module-dirs): crmodverdir $(objtree)/Module.symvers 1153 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1154 1155modules: $(module-dirs) 1156 @echo ' Building modules, stage 2.'; 1157 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1158 1159PHONY += modules_install 1160modules_install: _emodinst_ _emodinst_post 1161 1162install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1163PHONY += _emodinst_ 1164_emodinst_: 1165 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1166 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1167 1168# Run depmod only is we have System.map and depmod is executable 1169quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1170 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1171 $(DEPMOD) -ae -F System.map \ 1172 $(if $(strip $(INSTALL_MOD_PATH)), \ 1173 -b $(INSTALL_MOD_PATH) -r) \ 1174 $(KERNELRELEASE); \ 1175 fi 1176 1177PHONY += _emodinst_post 1178_emodinst_post: _emodinst_ 1179 $(call cmd,depmod) 1180 1181clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1182 1183PHONY += $(clean-dirs) clean 1184$(clean-dirs): 1185 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1186 1187clean: rm-dirs := $(MODVERDIR) 1188clean: $(clean-dirs) 1189 $(call cmd,rmdirs) 1190 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1191 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1192 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1193 -type f -print | xargs rm -f 1194 1195help: 1196 @echo ' Building external modules.' 1197 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1198 @echo '' 1199 @echo ' modules - default target, build the module(s)' 1200 @echo ' modules_install - install the module' 1201 @echo ' clean - remove generated files in module directory only' 1202 @echo '' 1203 1204# Dummies... 1205PHONY += prepare scripts 1206prepare: ; 1207scripts: ; 1208endif # KBUILD_EXTMOD 1209 1210# Generate tags for editors 1211# --------------------------------------------------------------------------- 1212 1213#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1214#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1215#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1216 1217ifeq ($(src),$(obj)) 1218__srctree = 1219else 1220__srctree = $(srctree)/ 1221endif 1222 1223ifeq ($(ALLSOURCE_ARCHS),) 1224ifeq ($(ARCH),um) 1225ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1226else 1227ALLINCLUDE_ARCHS := $(ARCH) 1228endif 1229else 1230#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1231ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1232endif 1233 1234ALLSOURCE_ARCHS := $(ARCH) 1235 1236define find-sources 1237 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1238 \( -name include -o -name arch \) -prune -o \ 1239 -name $1 -print; \ 1240 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1241 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1242 -name $1 -print; \ 1243 done ; \ 1244 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1245 -name $1 -print; \ 1246 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1247 \( -name config -o -name 'asm-*' \) -prune \ 1248 -o -name $1 -print; \ 1249 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1250 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1251 -name $1 -print; \ 1252 done ; \ 1253 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1254 -name $1 -print ) 1255endef 1256 1257define all-sources 1258 $(call find-sources,'*.[chS]') 1259endef 1260define all-kconfigs 1261 $(call find-sources,'Kconfig*') 1262endef 1263define all-defconfigs 1264 $(call find-sources,'defconfig') 1265endef 1266 1267quiet_cmd_cscope-file = FILELST cscope.files 1268 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1269 1270quiet_cmd_cscope = MAKE cscope.out 1271 cmd_cscope = cscope -b 1272 1273cscope: FORCE 1274 $(call cmd,cscope-file) 1275 $(call cmd,cscope) 1276 1277quiet_cmd_TAGS = MAKE $@ 1278define cmd_TAGS 1279 rm -f $@; \ 1280 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1281 echo "-I __initdata,__exitdata,__acquires,__releases \ 1282 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1283 --extra=+f --c-kinds=+px"`; \ 1284 $(all-sources) | xargs etags $$ETAGSF -a; \ 1285 if test "x$$ETAGSF" = x; then \ 1286 $(all-kconfigs) | xargs etags -a \ 1287 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1288 $(all-defconfigs) | xargs etags -a \ 1289 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1290 fi 1291endef 1292 1293TAGS: FORCE 1294 $(call cmd,TAGS) 1295 1296 1297quiet_cmd_tags = MAKE $@ 1298define cmd_tags 1299 rm -f $@; \ 1300 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1301 echo "-I __initdata,__exitdata,__acquires,__releases \ 1302 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1303 --extra=+f --c-kinds=+px"`; \ 1304 $(all-sources) | xargs ctags $$CTAGSF -a 1305endef 1306 1307tags: FORCE 1308 $(call cmd,tags) 1309 1310 1311# Scripts to check various things for consistency 1312# --------------------------------------------------------------------------- 1313 1314includecheck: 1315 find * $(RCS_FIND_IGNORE) \ 1316 -name '*.[hcS]' -type f -print | sort \ 1317 | xargs $(PERL) -w scripts/checkincludes.pl 1318 1319versioncheck: 1320 find * $(RCS_FIND_IGNORE) \ 1321 -name '*.[hcS]' -type f -print | sort \ 1322 | xargs $(PERL) -w scripts/checkversion.pl 1323 1324namespacecheck: 1325 $(PERL) $(srctree)/scripts/namespace.pl 1326 1327endif #ifeq ($(config-targets),1) 1328endif #ifeq ($(mixed-targets),1) 1329 1330PHONY += checkstack kernelrelease kernelversion 1331checkstack: 1332 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1333 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1334 1335kernelrelease: 1336 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1337 $(error kernelrelease not valid - run 'make prepare' to update it)) 1338kernelversion: 1339 @echo $(KERNELVERSION) 1340 1341# Single targets 1342# --------------------------------------------------------------------------- 1343# Single targets are compatible with: 1344# - build whith mixed source and output 1345# - build with separate output dir 'make O=...' 1346# - external modules 1347# 1348# target-dir => where to store outputfile 1349# build-dir => directory in kernel source tree to use 1350 1351ifeq ($(KBUILD_EXTMOD),) 1352 build-dir = $(patsubst %/,%,$(dir $@)) 1353 target-dir = $(dir $@) 1354else 1355 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1356 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1357 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1358endif 1359 1360%.s: %.c prepare scripts FORCE 1361 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1362%.i: %.c prepare scripts FORCE 1363 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1364%.o: %.c prepare scripts FORCE 1365 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1366%.lst: %.c prepare scripts FORCE 1367 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1368%.s: %.S prepare scripts FORCE 1369 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1370%.o: %.S prepare scripts FORCE 1371 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1372%.symtypes: %.c prepare scripts FORCE 1373 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1374 1375# Modules 1376/ %/: prepare scripts FORCE 1377 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1378 $(build)=$(build-dir) 1379%.ko: prepare scripts FORCE 1380 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1381 $(build)=$(build-dir) $(@:.ko=.o) 1382 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1383 1384# FIXME Should go into a make.lib or something 1385# =========================================================================== 1386 1387quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1388 cmd_rmdirs = rm -rf $(rm-dirs) 1389 1390quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1391 cmd_rmfiles = rm -f $(rm-files) 1392 1393 1394a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1395 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1396 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1397 1398quiet_cmd_as_o_S = AS $@ 1399cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1400 1401# read all saved command lines 1402 1403targets := $(wildcard $(sort $(targets))) 1404cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1405 1406ifneq ($(cmd_files),) 1407 $(cmd_files): ; # Do not try to update included dependency files 1408 include $(cmd_files) 1409endif 1410 1411# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1412# Usage: 1413# $(Q)$(MAKE) $(clean)=dir 1414clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1415 1416endif # skip-makefile 1417 1418PHONY += FORCE 1419FORCE: 1420 1421 1422# Declare the contents of the .PHONY variable as phony. We keep that 1423# information in a variable se we can use it in if_changed and friends. 1424.PHONY: $(PHONY) 1425