1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 18 4EXTRAVERSION = -rc1 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-all \ 314 -fno-stack-protector) 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) $(PATCHLEVEL) 359endif 360 361# To make sure we do not include .config for any of the *config targets 362# catch them early, and hand them over to scripts/kconfig/Makefile 363# It is allowed to specify more targets when calling make, including 364# mixing *config targets and build targets. 365# For example 'make oldconfig all'. 366# Detect when mixed targets is specified, and make a second invocation 367# of make so .config is not included in this case either (for *config). 368 369no-dot-config-targets := clean mrproper distclean \ 370 cscope TAGS tags help %docs check% \ 371 kernelrelease kernelversion 372 373config-targets := 0 374mixed-targets := 0 375dot-config := 1 376 377ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 378 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 379 dot-config := 0 380 endif 381endif 382 383ifeq ($(KBUILD_EXTMOD),) 384 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 385 config-targets := 1 386 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 387 mixed-targets := 1 388 endif 389 endif 390endif 391 392ifeq ($(mixed-targets),1) 393# =========================================================================== 394# We're called with mixed targets (*config and build targets). 395# Handle them one by one. 396 397%:: FORCE 398 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 399 400else 401ifeq ($(config-targets),1) 402# =========================================================================== 403# *config targets only - make sure prerequisites are updated, and descend 404# in scripts/kconfig to make the *config target 405 406# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 407# KBUILD_DEFCONFIG may point out an alternative default configuration 408# used for 'make defconfig' 409include $(srctree)/arch/$(ARCH)/Makefile 410export KBUILD_DEFCONFIG 411 412config %config: scripts_basic outputmakefile FORCE 413 $(Q)mkdir -p include/linux include/config 414 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 415 416else 417# =========================================================================== 418# Build targets only - this includes vmlinux, arch specific targets, clean 419# targets and others. In general all targets except *config targets. 420 421ifeq ($(KBUILD_EXTMOD),) 422# Additional helpers built in scripts/ 423# Carefully list dependencies so we do not try to build scripts twice 424# in parallel 425PHONY += scripts 426scripts: scripts_basic include/config/auto.conf 427 $(Q)$(MAKE) $(build)=$(@) 428 429# Objects we will link into vmlinux / subdirs we need to visit 430init-y := init/ 431drivers-y := drivers/ sound/ 432net-y := net/ 433libs-y := lib/ 434core-y := usr/ 435endif # KBUILD_EXTMOD 436 437ifeq ($(dot-config),1) 438# In this section, we need .config 439 440# Read in dependencies to all Kconfig* files, make sure to run 441# oldconfig if changes are detected. 442-include include/config/auto.conf.cmd 443-include include/config/auto.conf 444 445# To avoid any implicit rule to kick in, define an empty command 446$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 447 448# If .config is newer than include/config/auto.conf, someone tinkered 449# with it and forgot to run make oldconfig. 450# if auto.conf.cmd is missing then we are probably in a cleaned tree so 451# we execute the config step to be sure to catch updated Kconfig files 452include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 453ifeq ($(KBUILD_EXTMOD),) 454 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 455else 456 $(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it) 457endif 458 459else 460# Dummy target needed, because used as prerequisite 461include/config/auto.conf: ; 462endif 463 464# The all: target is the default when no target is given on the 465# command line. 466# This allow a user to issue only 'make' to build a kernel including modules 467# Defaults vmlinux but it is usually overridden in the arch makefile 468all: vmlinux 469 470ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 471CFLAGS += -Os 472else 473CFLAGS += -O2 474endif 475 476ifdef CONFIG_FRAME_POINTER 477CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 478else 479CFLAGS += -fomit-frame-pointer 480endif 481 482ifdef CONFIG_UNWIND_INFO 483CFLAGS += -fasynchronous-unwind-tables 484endif 485 486ifdef CONFIG_DEBUG_INFO 487CFLAGS += -g 488endif 489 490include $(srctree)/arch/$(ARCH)/Makefile 491 492# arch Makefile may override CC so keep this after arch Makefile is included 493NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 494CHECKFLAGS += $(NOSTDINC_FLAGS) 495 496# warn about C99 declaration after statement 497CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 498 499# disable pointer signed / unsigned warnings in gcc 4.0 500CFLAGS += $(call cc-option,-Wno-pointer-sign,) 501 502# Default kernel image to build when no specific target is given. 503# KBUILD_IMAGE may be overruled on the command line or 504# set in the environment 505# Also any assignments in arch/$(ARCH)/Makefile take precedence over 506# this default value 507export KBUILD_IMAGE ?= vmlinux 508 509# 510# INSTALL_PATH specifies where to place the updated kernel and system map 511# images. Default is /boot, but you can set it to other values 512export INSTALL_PATH ?= /boot 513 514# 515# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 516# relocations required by build roots. This is not defined in the 517# makefile but the argument can be passed to make if needed. 518# 519 520MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 521export MODLIB 522 523# 524# INSTALL_MOD_STRIP, if defined, will cause modules to be 525# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 526# the default option --strip-debug will be used. Otherwise, 527# INSTALL_MOD_STRIP will used as the options to the strip command. 528 529ifdef INSTALL_MOD_STRIP 530ifeq ($(INSTALL_MOD_STRIP),1) 531mod_strip_cmd = $(STRIP) --strip-debug 532else 533mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 534endif # INSTALL_MOD_STRIP=1 535else 536mod_strip_cmd = true 537endif # INSTALL_MOD_STRIP 538export mod_strip_cmd 539 540 541ifeq ($(KBUILD_EXTMOD),) 542core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 543 544vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 545 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 546 $(net-y) $(net-m) $(libs-y) $(libs-m))) 547 548vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 549 $(init-n) $(init-) \ 550 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 551 $(net-n) $(net-) $(libs-n) $(libs-)))) 552 553init-y := $(patsubst %/, %/built-in.o, $(init-y)) 554core-y := $(patsubst %/, %/built-in.o, $(core-y)) 555drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 556net-y := $(patsubst %/, %/built-in.o, $(net-y)) 557libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 558libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 559libs-y := $(libs-y1) $(libs-y2) 560 561# Build vmlinux 562# --------------------------------------------------------------------------- 563# vmlinux is built from the objects selected by $(vmlinux-init) and 564# $(vmlinux-main). Most are built-in.o files from top-level directories 565# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 566# Ordering when linking is important, and $(vmlinux-init) must be first. 567# 568# vmlinux 569# ^ 570# | 571# +-< $(vmlinux-init) 572# | +--< init/version.o + more 573# | 574# +--< $(vmlinux-main) 575# | +--< driver/built-in.o mm/built-in.o + more 576# | 577# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 578# 579# vmlinux version (uname -v) cannot be updated during normal 580# descending-into-subdirs phase since we do not yet know if we need to 581# update vmlinux. 582# Therefore this step is delayed until just before final link of vmlinux - 583# except in the kallsyms case where it is done just before adding the 584# symbols to the kernel. 585# 586# System.map is generated to document addresses of all kernel symbols 587 588vmlinux-init := $(head-y) $(init-y) 589vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 590vmlinux-all := $(vmlinux-init) $(vmlinux-main) 591vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 592 593# Rule to link vmlinux - also used during CONFIG_KALLSYMS 594# May be overridden by arch/$(ARCH)/Makefile 595quiet_cmd_vmlinux__ ?= LD $@ 596 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 597 -T $(vmlinux-lds) $(vmlinux-init) \ 598 --start-group $(vmlinux-main) --end-group \ 599 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 600 601# Generate new vmlinux version 602quiet_cmd_vmlinux_version = GEN .version 603 cmd_vmlinux_version = set -e; \ 604 if [ ! -r .version ]; then \ 605 rm -f .version; \ 606 echo 1 >.version; \ 607 else \ 608 mv .version .old_version; \ 609 expr 0$$(cat .old_version) + 1 >.version; \ 610 fi; \ 611 $(MAKE) $(build)=init 612 613# Generate System.map 614quiet_cmd_sysmap = SYSMAP 615 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 616 617# Link of vmlinux 618# If CONFIG_KALLSYMS is set .version is already updated 619# Generate System.map and verify that the content is consistent 620# Use + in front of the vmlinux_version rule to silent warning with make -j2 621# First command is ':' to allow us to use + in front of the rule 622define rule_vmlinux__ 623 : 624 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 625 626 $(call cmd,vmlinux__) 627 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 628 629 $(Q)$(if $($(quiet)cmd_sysmap), \ 630 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 631 $(cmd_sysmap) $@ System.map; \ 632 if [ $$? -ne 0 ]; then \ 633 rm -f $@; \ 634 /bin/false; \ 635 fi; 636 $(verify_kallsyms) 637endef 638 639 640ifdef CONFIG_KALLSYMS 641# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 642# It's a three stage process: 643# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 644# empty 645# Running kallsyms on that gives us .tmp_kallsyms1.o with 646# the right size - vmlinux version (uname -v) is updated during this step 647# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 648# but due to the added section, some addresses have shifted. 649# From here, we generate a correct .tmp_kallsyms2.o 650# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 651# o Verify that the System.map from vmlinux matches the map from 652# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 653# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 654# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 655# temporary bypass to allow the kernel to be built while the 656# maintainers work out what went wrong with kallsyms. 657 658ifdef CONFIG_KALLSYMS_EXTRA_PASS 659last_kallsyms := 3 660else 661last_kallsyms := 2 662endif 663 664kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 665 666define verify_kallsyms 667 $(Q)$(if $($(quiet)cmd_sysmap), \ 668 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 669 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 670 $(Q)cmp -s System.map .tmp_System.map || \ 671 (echo Inconsistent kallsyms data; \ 672 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 673 rm .tmp_kallsyms* ; /bin/false ) 674endef 675 676# Update vmlinux version before link 677# Use + in front of this rule to silent warning about make -j1 678# First command is ':' to allow us to use + in front of this rule 679cmd_ksym_ld = $(cmd_vmlinux__) 680define rule_ksym_ld 681 : 682 +$(call cmd,vmlinux_version) 683 $(call cmd,vmlinux__) 684 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 685endef 686 687# Generate .S file with all kernel symbols 688quiet_cmd_kallsyms = KSYM $@ 689 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 690 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 691 692.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 693 $(call if_changed_dep,as_o_S) 694 695.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 696 $(call cmd,kallsyms) 697 698# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 699.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 700 $(call if_changed_rule,ksym_ld) 701 702.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 703 $(call if_changed,vmlinux__) 704 705.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 706 $(call if_changed,vmlinux__) 707 708# Needs to visit scripts/ before $(KALLSYMS) can be used. 709$(KALLSYMS): scripts ; 710 711# Generate some data for debugging strange kallsyms problems 712debug_kallsyms: .tmp_map$(last_kallsyms) 713 714.tmp_map%: .tmp_vmlinux% FORCE 715 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 716 717.tmp_map3: .tmp_map2 718 719.tmp_map2: .tmp_map1 720 721endif # ifdef CONFIG_KALLSYMS 722 723# vmlinux image - including updated kernel symbols 724vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 725 $(call if_changed_rule,vmlinux__) 726 $(Q)rm -f .old_version 727 728# The actual objects are generated when descending, 729# make sure no implicit rule kicks in 730$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 731 732# Handle descending into subdirectories listed in $(vmlinux-dirs) 733# Preset locale variables to speed up the build process. Limit locale 734# tweaks to this spot to avoid wrong language settings when running 735# make menuconfig etc. 736# Error messages still appears in the original language 737 738PHONY += $(vmlinux-dirs) 739$(vmlinux-dirs): prepare scripts 740 $(Q)$(MAKE) $(build)=$@ 741 742# Build the kernel release string 743# The KERNELRELEASE is stored in a file named include/config/kernel.release 744# to be used when executing for example make install or make modules_install 745# 746# Take the contents of any files called localversion* and the config 747# variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. 748# LOCALVERSION from the command line override all of this 749 750nullstring := 751space := $(nullstring) # end of line 752 753___localver = $(objtree)/localversion* $(srctree)/localversion* 754__localver = $(sort $(wildcard $(___localver))) 755# skip backup files (containing '~') 756_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 757 758localver = $(subst $(space),, \ 759 $(shell cat /dev/null $(_localver)) \ 760 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 761 762# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 763# and if the SCM is know a tag from the SCM is appended. 764# The appended tag is determined by the SCM used. 765# 766# Currently, only git is supported. 767# Other SCMs can edit scripts/setlocalversion and add the appropriate 768# checks as needed. 769ifdef CONFIG_LOCALVERSION_AUTO 770 _localver-auto = $(shell $(CONFIG_SHELL) \ 771 $(srctree)/scripts/setlocalversion $(srctree)) 772 localver-auto = $(LOCALVERSION)$(_localver-auto) 773endif 774 775localver-full = $(localver)$(localver-auto) 776 777# Store (new) KERNELRELASE string in include/config/kernel.release 778kernelrelease = $(KERNELVERSION)$(localver-full) 779include/config/kernel.release: include/config/auto.conf FORCE 780 $(Q)rm -f $@ 781 $(Q)echo $(kernelrelease) > $@ 782 783 784# Things we need to do before we recursively start building the kernel 785# or the modules are listed in "prepare". 786# A multi level approach is used. prepareN is processed before prepareN-1. 787# archprepare is used in arch Makefiles and when processed asm symlink, 788# version.h and scripts_basic is processed / created. 789 790# Listed in dependency order 791PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 792 793# prepare-all is deprecated, use prepare as valid replacement 794PHONY += prepare-all 795 796# prepare3 is used to check if we are building in a separate output directory, 797# and if so do: 798# 1) Check that make has not been executed in the kernel src $(srctree) 799# 2) Create the include2 directory, used for the second asm symlink 800prepare3: include/config/kernel.release 801ifneq ($(KBUILD_SRC),) 802 @echo ' Using $(srctree) as source for kernel' 803 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 804 echo " $(srctree) is not clean, please run 'make mrproper'";\ 805 echo " in the '$(srctree)' directory.";\ 806 /bin/false; \ 807 fi; 808 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 809 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 810endif 811 812# prepare2 creates a makefile if using a separate output directory 813prepare2: prepare3 outputmakefile 814 815prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 816 include/asm include/config/auto.conf 817ifneq ($(KBUILD_MODULES),) 818 $(Q)mkdir -p $(MODVERDIR) 819 $(Q)rm -f $(MODVERDIR)/* 820endif 821 822archprepare: prepare1 scripts_basic 823 824prepare0: archprepare FORCE 825 $(Q)$(MAKE) $(build)=. 826 827# All the preparing.. 828prepare prepare-all: prepare0 829 830# Leave this as default for preprocessing vmlinux.lds.S, which is now 831# done in arch/$(ARCH)/kernel/Makefile 832 833export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 834 835# FIXME: The asm symlink changes when $(ARCH) changes. That's 836# hard to detect, but I suppose "make mrproper" is a good idea 837# before switching between archs anyway. 838 839include/asm: 840 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 841 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 842 @ln -fsn asm-$(ARCH) $@ 843 844# Generate some files 845# --------------------------------------------------------------------------- 846 847# KERNELRELEASE can change from a few different places, meaning version.h 848# needs to be updated, so this check is forced on all builds 849 850uts_len := 64 851define filechk_utsrelease.h 852 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 853 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 854 exit 1; \ 855 fi; \ 856 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 857endef 858 859define filechk_version.h 860 (echo \#define LINUX_VERSION_CODE $(shell \ 861 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 862 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 863endef 864 865include/linux/version.h: $(srctree)/Makefile FORCE 866 $(call filechk,version.h) 867 868include/linux/utsrelease.h: include/config/kernel.release FORCE 869 $(call filechk,utsrelease.h) 870 871# --------------------------------------------------------------------------- 872 873PHONY += depend dep 874depend dep: 875 @echo '*** Warning: make $@ is unnecessary now.' 876 877# --------------------------------------------------------------------------- 878# Kernel headers 879INSTALL_HDR_PATH=$(MODLIB)/abi 880export INSTALL_HDR_PATH 881 882PHONY += headers_install 883headers_install: include/linux/version.h 884 $(Q)unifdef -Ux /dev/null 885 $(Q)rm -rf $(INSTALL_HDR_PATH)/include 886 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include 887 888PHONY += headers_check 889headers_check: headers_install 890 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 891 892# --------------------------------------------------------------------------- 893# Modules 894 895ifdef CONFIG_MODULES 896 897# By default, build modules as well 898 899all: modules 900 901# Build modules 902 903PHONY += modules 904modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 905 @echo ' Building modules, stage 2.'; 906 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 907 908 909# Target to prepare building external modules 910PHONY += modules_prepare 911modules_prepare: prepare scripts 912 913# Target to install modules 914PHONY += modules_install 915modules_install: _modinst_ _modinst_post 916 917PHONY += _modinst_ 918_modinst_: 919 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 920 echo "Warning: you may need to install module-init-tools"; \ 921 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 922 sleep 1; \ 923 fi 924 @rm -rf $(MODLIB)/kernel 925 @rm -f $(MODLIB)/source 926 @mkdir -p $(MODLIB)/kernel 927 @ln -s $(srctree) $(MODLIB)/source 928 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 929 rm -f $(MODLIB)/build ; \ 930 ln -s $(objtree) $(MODLIB)/build ; \ 931 fi 932 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 933 934# If System.map exists, run depmod. This deliberately does not have a 935# dependency on System.map since that would run the dependency tree on 936# vmlinux. This depmod is only for convenience to give the initial 937# boot a modules.dep even before / is mounted read-write. However the 938# boot script depmod is the master version. 939ifeq "$(strip $(INSTALL_MOD_PATH))" "" 940depmod_opts := 941else 942depmod_opts := -b $(INSTALL_MOD_PATH) -r 943endif 944PHONY += _modinst_post 945_modinst_post: _modinst_ 946 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 947 948else # CONFIG_MODULES 949 950# Modules not configured 951# --------------------------------------------------------------------------- 952 953modules modules_install: FORCE 954 @echo 955 @echo "The present kernel configuration has modules disabled." 956 @echo "Type 'make config' and enable loadable module support." 957 @echo "Then build a kernel with module support enabled." 958 @echo 959 @exit 1 960 961endif # CONFIG_MODULES 962 963### 964# Cleaning is done on three levels. 965# make clean Delete most generated files 966# Leave enough to build external modules 967# make mrproper Delete the current configuration, and all generated files 968# make distclean Remove editor backup files, patch leftover files and the like 969 970# Directories & files removed with 'make clean' 971CLEAN_DIRS += $(MODVERDIR) 972CLEAN_FILES += vmlinux System.map \ 973 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 974 975# Directories & files removed with 'make mrproper' 976MRPROPER_DIRS += include/config include2 977MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 978 include/linux/autoconf.h include/linux/version.h \ 979 include/linux/utsrelease.h \ 980 Module.symvers tags TAGS cscope* 981 982# clean - Delete most, but leave enough to build external modules 983# 984clean: rm-dirs := $(CLEAN_DIRS) 985clean: rm-files := $(CLEAN_FILES) 986clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 987 988PHONY += $(clean-dirs) clean archclean 989$(clean-dirs): 990 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 991 992clean: archclean $(clean-dirs) 993 $(call cmd,rmdirs) 994 $(call cmd,rmfiles) 995 @find . $(RCS_FIND_IGNORE) \ 996 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 997 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 998 -o -name '*.symtypes' \) \ 999 -type f -print | xargs rm -f 1000 1001# mrproper - Delete all generated files, including .config 1002# 1003mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1004mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1005mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1006 1007PHONY += $(mrproper-dirs) mrproper archmrproper 1008$(mrproper-dirs): 1009 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1010 1011mrproper: clean archmrproper $(mrproper-dirs) 1012 $(call cmd,rmdirs) 1013 $(call cmd,rmfiles) 1014 1015# distclean 1016# 1017PHONY += distclean 1018 1019distclean: mrproper 1020 @find $(srctree) $(RCS_FIND_IGNORE) \ 1021 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1022 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1023 -o -name '.*.rej' -o -size 0 \ 1024 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1025 -type f -print | xargs rm -f 1026 1027 1028# Packaging of the kernel to various formats 1029# --------------------------------------------------------------------------- 1030# rpm target kept for backward compatibility 1031package-dir := $(srctree)/scripts/package 1032 1033%pkg: include/config/kernel.release FORCE 1034 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1035rpm: include/config/kernel.release FORCE 1036 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1037 1038 1039# Brief documentation of the typical targets used 1040# --------------------------------------------------------------------------- 1041 1042boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1043boards := $(notdir $(boards)) 1044 1045help: 1046 @echo 'Cleaning targets:' 1047 @echo ' clean - remove most generated files but keep the config' 1048 @echo ' mrproper - remove all generated files + config + various backup files' 1049 @echo '' 1050 @echo 'Configuration targets:' 1051 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1052 @echo '' 1053 @echo 'Other generic targets:' 1054 @echo ' all - Build all targets marked with [*]' 1055 @echo '* vmlinux - Build the bare kernel' 1056 @echo '* modules - Build all modules' 1057 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1058 @echo ' dir/ - Build all files in dir and below' 1059 @echo ' dir/file.[ois] - Build specified target only' 1060 @echo ' dir/file.ko - Build module including final link' 1061 @echo ' rpm - Build a kernel as an RPM package' 1062 @echo ' tags/TAGS - Generate tags file for editors' 1063 @echo ' cscope - Generate cscope index' 1064 @echo ' kernelrelease - Output the release version string' 1065 @echo ' kernelversion - Output the version stored in Makefile' 1066 @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH' 1067 @echo ' (default: /lib/modules/$$VERSION/abi)' 1068 @echo '' 1069 @echo 'Static analysers' 1070 @echo ' checkstack - Generate a list of stack hogs' 1071 @echo ' namespacecheck - Name space analysis on compiled kernel' 1072 @echo '' 1073 @echo 'Kernel packaging:' 1074 @$(MAKE) $(build)=$(package-dir) help 1075 @echo '' 1076 @echo 'Documentation targets:' 1077 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1078 @echo '' 1079 @echo 'Architecture specific targets ($(ARCH)):' 1080 @$(if $(archhelp),$(archhelp),\ 1081 echo ' No architecture specific help defined for $(ARCH)') 1082 @echo '' 1083 @$(if $(boards), \ 1084 $(foreach b, $(boards), \ 1085 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1086 echo '') 1087 1088 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1089 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1090 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1091 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1092 @echo '' 1093 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1094 @echo 'For further info see the ./README file' 1095 1096 1097# Documentation targets 1098# --------------------------------------------------------------------------- 1099%docs: scripts_basic FORCE 1100 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1101 1102else # KBUILD_EXTMOD 1103 1104### 1105# External module support. 1106# When building external modules the kernel used as basis is considered 1107# read-only, and no consistency checks are made and the make 1108# system is not used on the basis kernel. If updates are required 1109# in the basis kernel ordinary make commands (without M=...) must 1110# be used. 1111# 1112# The following are the only valid targets when building external 1113# modules. 1114# make M=dir clean Delete all automatically generated files 1115# make M=dir modules Make all modules in specified dir 1116# make M=dir Same as 'make M=dir modules' 1117# make M=dir modules_install 1118# Install the modules built in the module directory 1119# Assumes install directory is already created 1120 1121# We are always building modules 1122KBUILD_MODULES := 1 1123PHONY += crmodverdir 1124crmodverdir: 1125 $(Q)mkdir -p $(MODVERDIR) 1126 $(Q)rm -f $(MODVERDIR)/* 1127 1128PHONY += $(objtree)/Module.symvers 1129$(objtree)/Module.symvers: 1130 @test -e $(objtree)/Module.symvers || ( \ 1131 echo; \ 1132 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1133 echo " is missing; modules will have no dependencies and modversions."; \ 1134 echo ) 1135 1136module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1137PHONY += $(module-dirs) modules 1138$(module-dirs): crmodverdir $(objtree)/Module.symvers 1139 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1140 1141modules: $(module-dirs) 1142 @echo ' Building modules, stage 2.'; 1143 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1144 1145PHONY += modules_install 1146modules_install: _emodinst_ _emodinst_post 1147 1148install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1149PHONY += _emodinst_ 1150_emodinst_: 1151 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1152 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst 1153 1154# Run depmod only is we have System.map and depmod is executable 1155quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1156 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1157 $(DEPMOD) -ae -F System.map \ 1158 $(if $(strip $(INSTALL_MOD_PATH)), \ 1159 -b $(INSTALL_MOD_PATH) -r) \ 1160 $(KERNELRELEASE); \ 1161 fi 1162 1163PHONY += _emodinst_post 1164_emodinst_post: _emodinst_ 1165 $(call cmd,depmod) 1166 1167clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1168 1169PHONY += $(clean-dirs) clean 1170$(clean-dirs): 1171 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1172 1173clean: rm-dirs := $(MODVERDIR) 1174clean: $(clean-dirs) 1175 $(call cmd,rmdirs) 1176 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1177 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1178 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1179 -type f -print | xargs rm -f 1180 1181help: 1182 @echo ' Building external modules.' 1183 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1184 @echo '' 1185 @echo ' modules - default target, build the module(s)' 1186 @echo ' modules_install - install the module' 1187 @echo ' clean - remove generated files in module directory only' 1188 @echo '' 1189 1190# Dummies... 1191PHONY += prepare scripts 1192prepare: ; 1193scripts: ; 1194endif # KBUILD_EXTMOD 1195 1196# Generate tags for editors 1197# --------------------------------------------------------------------------- 1198 1199#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1200#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1201#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1202 1203ifeq ($(src),$(obj)) 1204__srctree = 1205else 1206__srctree = $(srctree)/ 1207endif 1208 1209ifeq ($(ALLSOURCE_ARCHS),) 1210ifeq ($(ARCH),um) 1211ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1212else 1213ALLINCLUDE_ARCHS := $(ARCH) 1214endif 1215else 1216#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1217ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1218endif 1219 1220ALLSOURCE_ARCHS := $(ARCH) 1221 1222define find-sources 1223 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1224 \( -name include -o -name arch \) -prune -o \ 1225 -name $1 -print; \ 1226 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1227 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1228 -name $1 -print; \ 1229 done ; \ 1230 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1231 -name $1 -print; \ 1232 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1233 \( -name config -o -name 'asm-*' \) -prune \ 1234 -o -name $1 -print; \ 1235 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1236 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1237 -name $1 -print; \ 1238 done ; \ 1239 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1240 -name $1 -print ) 1241endef 1242 1243define all-sources 1244 $(call find-sources,'*.[chS]') 1245endef 1246define all-kconfigs 1247 $(call find-sources,'Kconfig*') 1248endef 1249define all-defconfigs 1250 $(call find-sources,'defconfig') 1251endef 1252 1253quiet_cmd_cscope-file = FILELST cscope.files 1254 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1255 1256quiet_cmd_cscope = MAKE cscope.out 1257 cmd_cscope = cscope -b 1258 1259cscope: FORCE 1260 $(call cmd,cscope-file) 1261 $(call cmd,cscope) 1262 1263quiet_cmd_TAGS = MAKE $@ 1264define cmd_TAGS 1265 rm -f $@; \ 1266 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ 1267 echo "-I __initdata,__exitdata,__acquires,__releases \ 1268 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1269 --extra=+f --c-kinds=+px"`; \ 1270 $(all-sources) | xargs etags $$ETAGSF -a; \ 1271 if test "x$$ETAGSF" = x; then \ 1272 $(all-kconfigs) | xargs etags -a \ 1273 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1274 $(all-defconfigs) | xargs etags -a \ 1275 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1276 fi 1277endef 1278 1279TAGS: FORCE 1280 $(call cmd,TAGS) 1281 1282 1283quiet_cmd_tags = MAKE $@ 1284define cmd_tags 1285 rm -f $@; \ 1286 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ 1287 echo "-I __initdata,__exitdata,__acquires,__releases \ 1288 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1289 --extra=+f --c-kinds=+px"`; \ 1290 $(all-sources) | xargs ctags $$CTAGSF -a 1291endef 1292 1293tags: FORCE 1294 $(call cmd,tags) 1295 1296 1297# Scripts to check various things for consistency 1298# --------------------------------------------------------------------------- 1299 1300includecheck: 1301 find * $(RCS_FIND_IGNORE) \ 1302 -name '*.[hcS]' -type f -print | sort \ 1303 | xargs $(PERL) -w scripts/checkincludes.pl 1304 1305versioncheck: 1306 find * $(RCS_FIND_IGNORE) \ 1307 -name '*.[hcS]' -type f -print | sort \ 1308 | xargs $(PERL) -w scripts/checkversion.pl 1309 1310namespacecheck: 1311 $(PERL) $(srctree)/scripts/namespace.pl 1312 1313endif #ifeq ($(config-targets),1) 1314endif #ifeq ($(mixed-targets),1) 1315 1316PHONY += checkstack kernelrelease kernelversion 1317checkstack: 1318 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1319 $(PERL) $(src)/scripts/checkstack.pl $(ARCH) 1320 1321kernelrelease: 1322 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1323 $(error kernelrelease not valid - run 'make prepare' to update it)) 1324kernelversion: 1325 @echo $(KERNELVERSION) 1326 1327# Single targets 1328# --------------------------------------------------------------------------- 1329# Single targets are compatible with: 1330# - build whith mixed source and output 1331# - build with separate output dir 'make O=...' 1332# - external modules 1333# 1334# target-dir => where to store outputfile 1335# build-dir => directory in kernel source tree to use 1336 1337ifeq ($(KBUILD_EXTMOD),) 1338 build-dir = $(patsubst %/,%,$(dir $@)) 1339 target-dir = $(dir $@) 1340else 1341 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1342 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1343 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1344endif 1345 1346%.s: %.c prepare scripts FORCE 1347 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1348%.i: %.c prepare scripts FORCE 1349 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1350%.o: %.c prepare scripts FORCE 1351 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1352%.lst: %.c prepare scripts FORCE 1353 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1354%.s: %.S prepare scripts FORCE 1355 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1356%.o: %.S prepare scripts FORCE 1357 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1358%.symtypes: %.c prepare scripts FORCE 1359 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1360 1361# Modules 1362/ %/: prepare scripts FORCE 1363 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1364 $(build)=$(build-dir) 1365%.ko: prepare scripts FORCE 1366 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1367 $(build)=$(build-dir) $(@:.ko=.o) 1368 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost 1369 1370# FIXME Should go into a make.lib or something 1371# =========================================================================== 1372 1373quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1374 cmd_rmdirs = rm -rf $(rm-dirs) 1375 1376quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1377 cmd_rmfiles = rm -f $(rm-files) 1378 1379 1380a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1381 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1382 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1383 1384quiet_cmd_as_o_S = AS $@ 1385cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1386 1387# read all saved command lines 1388 1389targets := $(wildcard $(sort $(targets))) 1390cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1391 1392ifneq ($(cmd_files),) 1393 $(cmd_files): ; # Do not try to update included dependency files 1394 include $(cmd_files) 1395endif 1396 1397# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1398# Usage: 1399# $(Q)$(MAKE) $(clean)=dir 1400clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1401 1402endif # skip-makefile 1403 1404PHONY += FORCE 1405FORCE: 1406 1407 1408# Declare the contents of the .PHONY variable as phony. We keep that 1409# information in a variable se we can use it in if_changed and friends. 1410.PHONY: $(PHONY) 1411