1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 19 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 = $(V) 38 endif 39endif 40ifndef KBUILD_VERBOSE 41 KBUILD_VERBOSE = 0 42endif 43 44# Call a source code checker (by default, "sparse") as part of the 45# C compilation. 46# 47# Use 'make C=1' to enable checking of only re-compiled files. 48# Use 'make C=2' to enable checking of *all* source files, regardless 49# of whether they are re-compiled or not. 50# 51# See the file "Documentation/sparse.txt" for more details, including 52# where to get the "sparse" utility. 53 54ifdef C 55 ifeq ("$(origin C)", "command line") 56 KBUILD_CHECKSRC = $(C) 57 endif 58endif 59ifndef KBUILD_CHECKSRC 60 KBUILD_CHECKSRC = 0 61endif 62 63# Use make M=dir to specify directory of external module to build 64# Old syntax make ... SUBDIRS=$PWD is still supported 65# Setting the environment variable KBUILD_EXTMOD take precedence 66ifdef SUBDIRS 67 KBUILD_EXTMOD ?= $(SUBDIRS) 68endif 69ifdef M 70 ifeq ("$(origin M)", "command line") 71 KBUILD_EXTMOD := $(M) 72 endif 73endif 74 75 76# kbuild supports saving output files in a separate directory. 77# To locate output files in a separate directory two syntaxes are supported. 78# In both cases the working directory must be the root of the kernel src. 79# 1) O= 80# Use "make O=dir/to/store/output/files/" 81# 82# 2) Set KBUILD_OUTPUT 83# Set the environment variable KBUILD_OUTPUT to point to the directory 84# where the output files shall be placed. 85# export KBUILD_OUTPUT=dir/to/store/output/files/ 86# make 87# 88# The O= assignment takes precedence over the KBUILD_OUTPUT environment 89# variable. 90 91 92# KBUILD_SRC is set on invocation of make in OBJ directory 93# KBUILD_SRC is not intended to be used by the regular user (for now) 94ifeq ($(KBUILD_SRC),) 95 96# OK, Make called in directory where kernel src resides 97# Do we want to locate output files in a separate directory? 98ifdef O 99 ifeq ("$(origin O)", "command line") 100 KBUILD_OUTPUT := $(O) 101 endif 102endif 103 104# That's our default target when none is given on the command line 105PHONY := _all 106_all: 107 108ifneq ($(KBUILD_OUTPUT),) 109# Invoke a second make in the output directory, passing relevant variables 110# check that the output directory actually exists 111saved-output := $(KBUILD_OUTPUT) 112KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 113$(if $(KBUILD_OUTPUT),, \ 114 $(error output directory "$(saved-output)" does not exist)) 115 116PHONY += $(MAKECMDGOALS) 117 118$(filter-out _all,$(MAKECMDGOALS)) _all: 119 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 120 KBUILD_SRC=$(CURDIR) \ 121 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ 122 123# Leave processing to above invocation of make 124skip-makefile := 1 125endif # ifneq ($(KBUILD_OUTPUT),) 126endif # ifeq ($(KBUILD_SRC),) 127 128# We process the rest of the Makefile if this is the final invocation of make 129ifeq ($(skip-makefile),) 130 131# If building an external module we do not care about the all: rule 132# but instead _all depend on modules 133PHONY += all 134ifeq ($(KBUILD_EXTMOD),) 135_all: all 136else 137_all: modules 138endif 139 140srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 141TOPDIR := $(srctree) 142# FIXME - TOPDIR is obsolete, use srctree/objtree 143objtree := $(CURDIR) 144src := $(srctree) 145obj := $(objtree) 146 147VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 148 149export srctree objtree VPATH TOPDIR 150 151 152# SUBARCH tells the usermode build what the underlying arch is. That is set 153# first, and if a usermode build is happening, the "ARCH=um" on the command 154# line overrides the setting of ARCH below. If a native build is happening, 155# then ARCH is assigned, getting whatever value it gets normally, and 156# SUBARCH is subsequently ignored. 157 158SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 159 -e s/arm.*/arm/ -e s/sa110/arm/ \ 160 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 161 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 162 163# Cross compiling and selecting different set of gcc/bin-utils 164# --------------------------------------------------------------------------- 165# 166# When performing cross compilation for other architectures ARCH shall be set 167# to the target architecture. (See arch/* for the possibilities). 168# ARCH can be set during invocation of make: 169# make ARCH=ia64 170# Another way is to have ARCH set in the environment. 171# The default ARCH is the host where make is executed. 172 173# CROSS_COMPILE specify the prefix used for all executables used 174# during compilation. Only gcc and related bin-utils executables 175# are prefixed with $(CROSS_COMPILE). 176# CROSS_COMPILE can be set on the command line 177# make CROSS_COMPILE=ia64-linux- 178# Alternatively CROSS_COMPILE can be set in the environment. 179# Default value for CROSS_COMPILE is not to prefix executables 180# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 181 182ARCH ?= $(SUBARCH) 183CROSS_COMPILE ?= 184 185# Architecture as present in compile.h 186UTS_MACHINE := $(ARCH) 187 188KCONFIG_CONFIG ?= .config 189 190# SHELL used by kbuild 191CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 192 else if [ -x /bin/bash ]; then echo /bin/bash; \ 193 else echo sh; fi ; fi) 194 195HOSTCC = gcc 196HOSTCXX = g++ 197HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 198HOSTCXXFLAGS = -O2 199 200# Decide whether to build built-in, modular, or both. 201# Normally, just do built-in. 202 203KBUILD_MODULES := 204KBUILD_BUILTIN := 1 205 206# If we have only "make modules", don't compile built-in objects. 207# When we're building modules with modversions, we need to consider 208# the built-in objects during the descend as well, in order to 209# make sure the checksums are up to date before we record them. 210 211ifeq ($(MAKECMDGOALS),modules) 212 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 213endif 214 215# If we have "make <whatever> modules", compile modules 216# in addition to whatever we do anyway. 217# Just "make" or "make all" shall build modules as well 218 219ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 220 KBUILD_MODULES := 1 221endif 222 223ifeq ($(MAKECMDGOALS),) 224 KBUILD_MODULES := 1 225endif 226 227export KBUILD_MODULES KBUILD_BUILTIN 228export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 229 230# Beautify output 231# --------------------------------------------------------------------------- 232# 233# Normally, we echo the whole command before executing it. By making 234# that echo $($(quiet)$(cmd)), we now have the possibility to set 235# $(quiet) to choose other forms of output instead, e.g. 236# 237# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 238# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 239# 240# If $(quiet) is empty, the whole command will be printed. 241# If it is set to "quiet_", only the short version will be printed. 242# If it is set to "silent_", nothing will be printed at all, since 243# the variable $(silent_cmd_cc_o_c) doesn't exist. 244# 245# A simple variant is to prefix commands with $(Q) - that's useful 246# for commands that shall be hidden in non-verbose mode. 247# 248# $(Q)ln $@ :< 249# 250# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 251# If KBUILD_VERBOSE equals 1 then the above command is displayed. 252 253ifeq ($(KBUILD_VERBOSE),1) 254 quiet = 255 Q = 256else 257 quiet=quiet_ 258 Q = @ 259endif 260 261# If the user is running make -s (silent mode), suppress echoing of 262# commands 263 264ifneq ($(findstring s,$(MAKEFLAGS)),) 265 quiet=silent_ 266endif 267 268export quiet Q KBUILD_VERBOSE 269 270 271# Look for make include files relative to root of kernel src 272MAKEFLAGS += --include-dir=$(srctree) 273 274# We need some generic definitions 275include $(srctree)/scripts/Kbuild.include 276 277# Do not use make's built-in rules and variables 278# This increases performance and avoid hard-to-debug behavour 279MAKEFLAGS += -rR 280 281# Make variables (CC, etc...) 282 283AS = $(CROSS_COMPILE)as 284LD = $(CROSS_COMPILE)ld 285CC = $(CROSS_COMPILE)gcc 286CPP = $(CC) -E 287AR = $(CROSS_COMPILE)ar 288NM = $(CROSS_COMPILE)nm 289STRIP = $(CROSS_COMPILE)strip 290OBJCOPY = $(CROSS_COMPILE)objcopy 291OBJDUMP = $(CROSS_COMPILE)objdump 292AWK = awk 293GENKSYMS = scripts/genksyms/genksyms 294DEPMOD = /sbin/depmod 295KALLSYMS = scripts/kallsyms 296PERL = perl 297CHECK = sparse 298 299CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 300MODFLAGS = -DMODULE 301CFLAGS_MODULE = $(MODFLAGS) 302AFLAGS_MODULE = $(MODFLAGS) 303LDFLAGS_MODULE = -r 304CFLAGS_KERNEL = 305AFLAGS_KERNEL = 306 307 308# Use LINUXINCLUDE when you must reference the include/ directory. 309# Needed to be compatible with the O= option 310LINUXINCLUDE := -Iinclude \ 311 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 312 -include include/linux/autoconf.h 313 314CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 315 316CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 317 -fno-strict-aliasing -fno-common 318AFLAGS := -D__ASSEMBLY__ 319 320# Read KERNELRELEASE from include/config/kernel.release (if it exists) 321KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 322KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 323 324export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 325export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 326export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 327export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 328 329export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 330export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 331export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 332 333# When compiling out-of-tree modules, put MODVERDIR in the module 334# tree rather than in the kernel tree. The kernel tree might 335# even be read-only. 336export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 337 338# Files to ignore in find ... statements 339 340RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 341export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 342 343# =========================================================================== 344# Rules shared between *config targets and build targets 345 346# Basic helpers built in scripts/ 347PHONY += scripts_basic 348scripts_basic: 349 $(Q)$(MAKE) $(build)=scripts/basic 350 351# To avoid any implicit rule to kick in, define an empty command. 352scripts/basic/%: scripts_basic ; 353 354PHONY += outputmakefile 355# outputmakefile generates a Makefile in the output directory, if using a 356# separate output directory. This allows convenient use of make in the 357# output directory. 358outputmakefile: 359ifneq ($(KBUILD_SRC),) 360 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 361 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 362endif 363 364# To make sure we do not include .config for any of the *config targets 365# catch them early, and hand them over to scripts/kconfig/Makefile 366# It is allowed to specify more targets when calling make, including 367# mixing *config targets and build targets. 368# For example 'make oldconfig all'. 369# Detect when mixed targets is specified, and make a second invocation 370# of make so .config is not included in this case either (for *config). 371 372no-dot-config-targets := clean mrproper distclean \ 373 cscope TAGS tags help %docs check% \ 374 include/linux/version.h headers_% \ 375 kernelrelease kernelversion 376 377config-targets := 0 378mixed-targets := 0 379dot-config := 1 380 381ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 382 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 383 dot-config := 0 384 endif 385endif 386 387ifeq ($(KBUILD_EXTMOD),) 388 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 389 config-targets := 1 390 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 391 mixed-targets := 1 392 endif 393 endif 394endif 395 396ifeq ($(mixed-targets),1) 397# =========================================================================== 398# We're called with mixed targets (*config and build targets). 399# Handle them one by one. 400 401%:: FORCE 402 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 403 404else 405ifeq ($(config-targets),1) 406# =========================================================================== 407# *config targets only - make sure prerequisites are updated, and descend 408# in scripts/kconfig to make the *config target 409 410# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 411# KBUILD_DEFCONFIG may point out an alternative default configuration 412# used for 'make defconfig' 413include $(srctree)/arch/$(ARCH)/Makefile 414export KBUILD_DEFCONFIG 415 416config %config: scripts_basic outputmakefile FORCE 417 $(Q)mkdir -p include/linux include/config 418 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 419 420else 421# =========================================================================== 422# Build targets only - this includes vmlinux, arch specific targets, clean 423# targets and others. In general all targets except *config targets. 424 425ifeq ($(KBUILD_EXTMOD),) 426# Additional helpers built in scripts/ 427# Carefully list dependencies so we do not try to build scripts twice 428# in parallel 429PHONY += scripts 430scripts: scripts_basic include/config/auto.conf 431 $(Q)$(MAKE) $(build)=$(@) 432 433# Objects we will link into vmlinux / subdirs we need to visit 434init-y := init/ 435drivers-y := drivers/ sound/ 436net-y := net/ 437libs-y := lib/ 438core-y := usr/ 439endif # KBUILD_EXTMOD 440 441ifeq ($(dot-config),1) 442# Read in config 443-include include/config/auto.conf 444 445ifeq ($(KBUILD_EXTMOD),) 446# Read in dependencies to all Kconfig* files, make sure to run 447# oldconfig if changes are detected. 448-include include/config/auto.conf.cmd 449 450# To avoid any implicit rule to kick in, define an empty command 451$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 452 453# If .config is newer than include/config/auto.conf, someone tinkered 454# with it and forgot to run make oldconfig. 455# if auto.conf.cmd is missing then we are probably in a cleaned tree so 456# we execute the config step to be sure to catch updated Kconfig files 457include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 458 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 459else 460# external modules needs include/linux/autoconf.h and include/config/auto.conf 461# but do not care if they are up-to-date. Use auto.conf to trigger the test 462PHONY += include/config/auto.conf 463 464include/config/auto.conf: 465 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 466 echo; \ 467 echo " ERROR: Kernel configuration is invalid."; \ 468 echo " include/linux/autoconf.h or $@ are missing."; \ 469 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 470 echo; \ 471 /bin/false) 472 473endif # KBUILD_EXTMOD 474 475else 476# Dummy target needed, because used as prerequisite 477include/config/auto.conf: ; 478endif # $(dot-config) 479 480# The all: target is the default when no target is given on the 481# command line. 482# This allow a user to issue only 'make' to build a kernel including modules 483# Defaults vmlinux but it is usually overridden in the arch makefile 484all: vmlinux 485 486ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 487CFLAGS += -Os 488else 489CFLAGS += -O2 490endif 491 492include $(srctree)/arch/$(ARCH)/Makefile 493 494ifdef CONFIG_FRAME_POINTER 495CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) 496else 497CFLAGS += -fomit-frame-pointer 498endif 499 500ifdef CONFIG_UNWIND_INFO 501CFLAGS += -fasynchronous-unwind-tables 502LDFLAGS_vmlinux += --eh-frame-hdr 503endif 504 505ifdef CONFIG_DEBUG_INFO 506CFLAGS += -g 507endif 508 509# Force gcc to behave correct even for buggy distributions 510CFLAGS += $(call cc-option, -fno-stack-protector) 511 512# arch Makefile may override CC so keep this after arch Makefile is included 513NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 514CHECKFLAGS += $(NOSTDINC_FLAGS) 515 516# warn about C99 declaration after statement 517CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 518 519# disable pointer signed / unsigned warnings in gcc 4.0 520CFLAGS += $(call cc-option,-Wno-pointer-sign,) 521 522# Default kernel image to build when no specific target is given. 523# KBUILD_IMAGE may be overruled on the command line or 524# set in the environment 525# Also any assignments in arch/$(ARCH)/Makefile take precedence over 526# this default value 527export KBUILD_IMAGE ?= vmlinux 528 529# 530# INSTALL_PATH specifies where to place the updated kernel and system map 531# images. Default is /boot, but you can set it to other values 532export INSTALL_PATH ?= /boot 533 534# 535# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 536# relocations required by build roots. This is not defined in the 537# makefile but the argument can be passed to make if needed. 538# 539 540MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 541export MODLIB 542 543# 544# INSTALL_MOD_STRIP, if defined, will cause modules to be 545# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 546# the default option --strip-debug will be used. Otherwise, 547# INSTALL_MOD_STRIP will used as the options to the strip command. 548 549ifdef INSTALL_MOD_STRIP 550ifeq ($(INSTALL_MOD_STRIP),1) 551mod_strip_cmd = $(STRIP) --strip-debug 552else 553mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 554endif # INSTALL_MOD_STRIP=1 555else 556mod_strip_cmd = true 557endif # INSTALL_MOD_STRIP 558export mod_strip_cmd 559 560 561ifeq ($(KBUILD_EXTMOD),) 562core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 563 564vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 565 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 566 $(net-y) $(net-m) $(libs-y) $(libs-m))) 567 568vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 569 $(init-n) $(init-) \ 570 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 571 $(net-n) $(net-) $(libs-n) $(libs-)))) 572 573init-y := $(patsubst %/, %/built-in.o, $(init-y)) 574core-y := $(patsubst %/, %/built-in.o, $(core-y)) 575drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 576net-y := $(patsubst %/, %/built-in.o, $(net-y)) 577libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 578libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 579libs-y := $(libs-y1) $(libs-y2) 580 581# Build vmlinux 582# --------------------------------------------------------------------------- 583# vmlinux is built from the objects selected by $(vmlinux-init) and 584# $(vmlinux-main). Most are built-in.o files from top-level directories 585# in the kernel tree, others are specified in arch/$(ARCH)Makefile. 586# Ordering when linking is important, and $(vmlinux-init) must be first. 587# 588# vmlinux 589# ^ 590# | 591# +-< $(vmlinux-init) 592# | +--< init/version.o + more 593# | 594# +--< $(vmlinux-main) 595# | +--< driver/built-in.o mm/built-in.o + more 596# | 597# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 598# 599# vmlinux version (uname -v) cannot be updated during normal 600# descending-into-subdirs phase since we do not yet know if we need to 601# update vmlinux. 602# Therefore this step is delayed until just before final link of vmlinux - 603# except in the kallsyms case where it is done just before adding the 604# symbols to the kernel. 605# 606# System.map is generated to document addresses of all kernel symbols 607 608vmlinux-init := $(head-y) $(init-y) 609vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 610vmlinux-all := $(vmlinux-init) $(vmlinux-main) 611vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds 612 613# Rule to link vmlinux - also used during CONFIG_KALLSYMS 614# May be overridden by arch/$(ARCH)/Makefile 615quiet_cmd_vmlinux__ ?= LD $@ 616 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 617 -T $(vmlinux-lds) $(vmlinux-init) \ 618 --start-group $(vmlinux-main) --end-group \ 619 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) 620 621# Generate new vmlinux version 622quiet_cmd_vmlinux_version = GEN .version 623 cmd_vmlinux_version = set -e; \ 624 if [ ! -r .version ]; then \ 625 rm -f .version; \ 626 echo 1 >.version; \ 627 else \ 628 mv .version .old_version; \ 629 expr 0$$(cat .old_version) + 1 >.version; \ 630 fi; \ 631 $(MAKE) $(build)=init 632 633# Generate System.map 634quiet_cmd_sysmap = SYSMAP 635 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 636 637# Link of vmlinux 638# If CONFIG_KALLSYMS is set .version is already updated 639# Generate System.map and verify that the content is consistent 640# Use + in front of the vmlinux_version rule to silent warning with make -j2 641# First command is ':' to allow us to use + in front of the rule 642define rule_vmlinux__ 643 : 644 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 645 646 $(call cmd,vmlinux__) 647 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 648 649 $(Q)$(if $($(quiet)cmd_sysmap), \ 650 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 651 $(cmd_sysmap) $@ System.map; \ 652 if [ $$? -ne 0 ]; then \ 653 rm -f $@; \ 654 /bin/false; \ 655 fi; 656 $(verify_kallsyms) 657endef 658 659 660ifdef CONFIG_KALLSYMS 661# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 662# It's a three stage process: 663# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 664# empty 665# Running kallsyms on that gives us .tmp_kallsyms1.o with 666# the right size - vmlinux version (uname -v) is updated during this step 667# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 668# but due to the added section, some addresses have shifted. 669# From here, we generate a correct .tmp_kallsyms2.o 670# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 671# o Verify that the System.map from vmlinux matches the map from 672# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 673# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 674# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 675# temporary bypass to allow the kernel to be built while the 676# maintainers work out what went wrong with kallsyms. 677 678ifdef CONFIG_KALLSYMS_EXTRA_PASS 679last_kallsyms := 3 680else 681last_kallsyms := 2 682endif 683 684kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 685 686define verify_kallsyms 687 $(Q)$(if $($(quiet)cmd_sysmap), \ 688 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 689 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 690 $(Q)cmp -s System.map .tmp_System.map || \ 691 (echo Inconsistent kallsyms data; \ 692 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 693 rm .tmp_kallsyms* ; /bin/false ) 694endef 695 696# Update vmlinux version before link 697# Use + in front of this rule to silent warning about make -j1 698# First command is ':' to allow us to use + in front of this rule 699cmd_ksym_ld = $(cmd_vmlinux__) 700define rule_ksym_ld 701 : 702 +$(call cmd,vmlinux_version) 703 $(call cmd,vmlinux__) 704 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 705endef 706 707# Generate .S file with all kernel symbols 708quiet_cmd_kallsyms = KSYM $@ 709 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 710 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 711 712.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 713 $(call if_changed_dep,as_o_S) 714 715.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 716 $(call cmd,kallsyms) 717 718# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 719.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 720 $(call if_changed_rule,ksym_ld) 721 722.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 723 $(call if_changed,vmlinux__) 724 725.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 726 $(call if_changed,vmlinux__) 727 728# Needs to visit scripts/ before $(KALLSYMS) can be used. 729$(KALLSYMS): scripts ; 730 731# Generate some data for debugging strange kallsyms problems 732debug_kallsyms: .tmp_map$(last_kallsyms) 733 734.tmp_map%: .tmp_vmlinux% FORCE 735 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 736 737.tmp_map3: .tmp_map2 738 739.tmp_map2: .tmp_map1 740 741endif # ifdef CONFIG_KALLSYMS 742 743# vmlinux image - including updated kernel symbols 744vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 745ifdef CONFIG_HEADERS_CHECK 746 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 747endif 748 $(call if_changed_rule,vmlinux__) 749 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 750 $(Q)rm -f .old_version 751 752# The actual objects are generated when descending, 753# make sure no implicit rule kicks in 754$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 755 756# Handle descending into subdirectories listed in $(vmlinux-dirs) 757# Preset locale variables to speed up the build process. Limit locale 758# tweaks to this spot to avoid wrong language settings when running 759# make menuconfig etc. 760# Error messages still appears in the original language 761 762PHONY += $(vmlinux-dirs) 763$(vmlinux-dirs): prepare scripts 764 $(Q)$(MAKE) $(build)=$@ 765 766# Build the kernel release string 767# 768# The KERNELRELEASE value built here is stored in the file 769# include/config/kernel.release, and is used when executing several 770# make targets, such as "make install" or "make modules_install." 771# 772# The eventual kernel release string consists of the following fields, 773# shown in a hierarchical format to show how smaller parts are concatenated 774# to form the larger and final value, with values coming from places like 775# the Makefile, kernel config options, make command line options and/or 776# SCM tag information. 777# 778# $(KERNELVERSION) 779# $(VERSION) eg, 2 780# $(PATCHLEVEL) eg, 6 781# $(SUBLEVEL) eg, 18 782# $(EXTRAVERSION) eg, -rc6 783# $(localver-full) 784# $(localver) 785# localversion* (all localversion* files) 786# $(CONFIG_LOCALVERSION) (from kernel config setting) 787# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 788# ./scripts/setlocalversion (SCM tag, if one exists) 789# $(LOCALVERSION) (from make command line if provided) 790# 791# Note how the final $(localver-auto) string is included *only* if the 792# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 793# moment, only git is supported but other SCMs can edit the script 794# scripts/setlocalversion and add the appropriate checks as needed. 795 796nullstring := 797space := $(nullstring) # end of line 798 799___localver = $(objtree)/localversion* $(srctree)/localversion* 800__localver = $(sort $(wildcard $(___localver))) 801# skip backup files (containing '~') 802_localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) 803 804localver = $(subst $(space),, \ 805 $(shell cat /dev/null $(_localver)) \ 806 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 807 808# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 809# and if the SCM is know a tag from the SCM is appended. 810# The appended tag is determined by the SCM used. 811# 812# Currently, only git is supported. 813# Other SCMs can edit scripts/setlocalversion and add the appropriate 814# checks as needed. 815ifdef CONFIG_LOCALVERSION_AUTO 816 _localver-auto = $(shell $(CONFIG_SHELL) \ 817 $(srctree)/scripts/setlocalversion $(srctree)) 818 localver-auto = $(LOCALVERSION)$(_localver-auto) 819endif 820 821localver-full = $(localver)$(localver-auto) 822 823# Store (new) KERNELRELASE string in include/config/kernel.release 824kernelrelease = $(KERNELVERSION)$(localver-full) 825include/config/kernel.release: include/config/auto.conf FORCE 826 $(Q)rm -f $@ 827 $(Q)echo $(kernelrelease) > $@ 828 829 830# Things we need to do before we recursively start building the kernel 831# or the modules are listed in "prepare". 832# A multi level approach is used. prepareN is processed before prepareN-1. 833# archprepare is used in arch Makefiles and when processed asm symlink, 834# version.h and scripts_basic is processed / created. 835 836# Listed in dependency order 837PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 838 839# prepare-all is deprecated, use prepare as valid replacement 840PHONY += prepare-all 841 842# prepare3 is used to check if we are building in a separate output directory, 843# and if so do: 844# 1) Check that make has not been executed in the kernel src $(srctree) 845# 2) Create the include2 directory, used for the second asm symlink 846prepare3: include/config/kernel.release 847ifneq ($(KBUILD_SRC),) 848 @echo ' Using $(srctree) as source for kernel' 849 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 850 echo " $(srctree) is not clean, please run 'make mrproper'";\ 851 echo " in the '$(srctree)' directory.";\ 852 /bin/false; \ 853 fi; 854 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 855 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm 856endif 857 858# prepare2 creates a makefile if using a separate output directory 859prepare2: prepare3 outputmakefile 860 861prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 862 include/asm include/config/auto.conf 863ifneq ($(KBUILD_MODULES),) 864 $(Q)mkdir -p $(MODVERDIR) 865 $(Q)rm -f $(MODVERDIR)/* 866endif 867 868archprepare: prepare1 scripts_basic 869 870prepare0: archprepare FORCE 871 $(Q)$(MAKE) $(build)=. 872 873# All the preparing.. 874prepare prepare-all: prepare0 875 876# Leave this as default for preprocessing vmlinux.lds.S, which is now 877# done in arch/$(ARCH)/kernel/Makefile 878 879export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 880 881# FIXME: The asm symlink changes when $(ARCH) changes. That's 882# hard to detect, but I suppose "make mrproper" is a good idea 883# before switching between archs anyway. 884 885include/asm: 886 @echo ' SYMLINK $@ -> include/asm-$(ARCH)' 887 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 888 @ln -fsn asm-$(ARCH) $@ 889 890# Generate some files 891# --------------------------------------------------------------------------- 892 893# KERNELRELEASE can change from a few different places, meaning version.h 894# needs to be updated, so this check is forced on all builds 895 896uts_len := 64 897define filechk_utsrelease.h 898 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 899 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 900 exit 1; \ 901 fi; \ 902 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 903endef 904 905define filechk_version.h 906 (echo \#define LINUX_VERSION_CODE $(shell \ 907 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 908 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 909endef 910 911include/linux/version.h: $(srctree)/Makefile FORCE 912 $(call filechk,version.h) 913 914include/linux/utsrelease.h: include/config/kernel.release FORCE 915 $(call filechk,utsrelease.h) 916 917# --------------------------------------------------------------------------- 918 919PHONY += depend dep 920depend dep: 921 @echo '*** Warning: make $@ is unnecessary now.' 922 923# --------------------------------------------------------------------------- 924# Kernel headers 925INSTALL_HDR_PATH=$(objtree)/usr 926export INSTALL_HDR_PATH 927 928HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 929 930PHONY += headers_install_all 931headers_install_all: include/linux/version.h scripts_basic FORCE 932 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 933 $(Q)for arch in $(HDRARCHES); do \ 934 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 935 done 936 937PHONY += headers_install 938headers_install: include/linux/version.h scripts_basic FORCE 939 @if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \ 940 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \ 941 exit 1 ; fi 942 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 943 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include 944 945PHONY += headers_check 946headers_check: headers_install 947 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1 948 949# --------------------------------------------------------------------------- 950# Modules 951 952ifdef CONFIG_MODULES 953 954# By default, build modules as well 955 956all: modules 957 958# Build modules 959 960PHONY += modules 961modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 962 @echo ' Building modules, stage 2.'; 963 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 964 965 966# Target to prepare building external modules 967PHONY += modules_prepare 968modules_prepare: prepare scripts 969 970# Target to install modules 971PHONY += modules_install 972modules_install: _modinst_ _modinst_post 973 974PHONY += _modinst_ 975_modinst_: 976 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 977 echo "Warning: you may need to install module-init-tools"; \ 978 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 979 sleep 1; \ 980 fi 981 @rm -rf $(MODLIB)/kernel 982 @rm -f $(MODLIB)/source 983 @mkdir -p $(MODLIB)/kernel 984 @ln -s $(srctree) $(MODLIB)/source 985 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 986 rm -f $(MODLIB)/build ; \ 987 ln -s $(objtree) $(MODLIB)/build ; \ 988 fi 989 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 990 991# If System.map exists, run depmod. This deliberately does not have a 992# dependency on System.map since that would run the dependency tree on 993# vmlinux. This depmod is only for convenience to give the initial 994# boot a modules.dep even before / is mounted read-write. However the 995# boot script depmod is the master version. 996ifeq "$(strip $(INSTALL_MOD_PATH))" "" 997depmod_opts := 998else 999depmod_opts := -b $(INSTALL_MOD_PATH) -r 1000endif
1001PHONY += _modinst_post 1002_modinst_post: _modinst_ 1003 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 1004 1005else # CONFIG_MODULES 1006 1007# Modules not configured 1008# --------------------------------------------------------------------------- 1009 1010modules modules_install: FORCE 1011 @echo 1012 @echo "The present kernel configuration has modules disabled." 1013 @echo "Type 'make config' and enable loadable module support." 1014 @echo "Then build a kernel with module support enabled." 1015 @echo 1016 @exit 1 1017 1018endif # CONFIG_MODULES 1019 1020### 1021# Cleaning is done on three levels. 1022# make clean Delete most generated files 1023# Leave enough to build external modules 1024# make mrproper Delete the current configuration, and all generated files 1025# make distclean Remove editor backup files, patch leftover files and the like 1026 1027# Directories & files removed with 'make clean' 1028CLEAN_DIRS += $(MODVERDIR) 1029CLEAN_FILES += vmlinux System.map \ 1030 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1031 1032# Directories & files removed with 'make mrproper' 1033MRPROPER_DIRS += include/config include2 usr/include 1034MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1035 include/linux/autoconf.h include/linux/version.h \ 1036 include/linux/utsrelease.h \ 1037 Module.symvers tags TAGS cscope* 1038 1039# clean - Delete most, but leave enough to build external modules 1040# 1041clean: rm-dirs := $(CLEAN_DIRS) 1042clean: rm-files := $(CLEAN_FILES) 1043clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1044 1045PHONY += $(clean-dirs) clean archclean 1046$(clean-dirs): 1047 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1048 1049clean: archclean $(clean-dirs) 1050 $(call cmd,rmdirs) 1051 $(call cmd,rmfiles) 1052 @find . $(RCS_FIND_IGNORE) \ 1053 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1054 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1055 -o -name '*.symtypes' \) \ 1056 -type f -print | xargs rm -f 1057 1058# mrproper - Delete all generated files, including .config 1059# 1060mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1061mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1062mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1063 1064PHONY += $(mrproper-dirs) mrproper archmrproper 1065$(mrproper-dirs): 1066 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1067 1068mrproper: clean archmrproper $(mrproper-dirs) 1069 $(call cmd,rmdirs) 1070 $(call cmd,rmfiles) 1071 1072# distclean 1073# 1074PHONY += distclean 1075 1076distclean: mrproper 1077 @find $(srctree) $(RCS_FIND_IGNORE) \ 1078 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1079 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1080 -o -name '.*.rej' -o -size 0 \ 1081 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1082 -type f -print | xargs rm -f 1083 1084 1085# Packaging of the kernel to various formats 1086# --------------------------------------------------------------------------- 1087# rpm target kept for backward compatibility 1088package-dir := $(srctree)/scripts/package 1089 1090%pkg: include/config/kernel.release FORCE 1091 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1092rpm: include/config/kernel.release FORCE 1093 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1094 1095 1096# Brief documentation of the typical targets used 1097# --------------------------------------------------------------------------- 1098 1099boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1100boards := $(notdir $(boards)) 1101 1102help: 1103 @echo 'Cleaning targets:' 1104 @echo ' clean - remove most generated files but keep the config and' 1105 @echo ' enough build support to build external modules' 1106 @echo ' mrproper - remove all generated files + config + various backup files' 1107 @echo ' distclean - mrproper + remove editor backup and patch files' 1108 @echo '' 1109 @echo 'Configuration targets:' 1110 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1111 @echo '' 1112 @echo 'Other generic targets:' 1113 @echo ' all - Build all targets marked with [*]' 1114 @echo '* vmlinux - Build the bare kernel' 1115 @echo '* modules - Build all modules' 1116 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1117 @echo ' dir/ - Build all files in dir and below' 1118 @echo ' dir/file.[ois] - Build specified target only' 1119 @echo ' dir/file.ko - Build module including final link' 1120 @echo ' rpm - Build a kernel as an RPM package' 1121 @echo ' tags/TAGS - Generate tags file for editors' 1122 @echo ' cscope - Generate cscope index' 1123 @echo ' kernelrelease - Output the release version string' 1124 @echo ' kernelversion - Output the version stored in Makefile' 1125 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \ 1126 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1127 fi 1128 @echo ' (default: $(INSTALL_HDR_PATH))' 1129 @echo '' 1130 @echo 'Static analysers' 1131 @echo ' checkstack - Generate a list of stack hogs' 1132 @echo ' namespacecheck - Name space analysis on compiled kernel' 1133 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \ 1134 echo ' headers_check - Sanity check on exported headers'; \ 1135 fi 1136 @echo '' 1137 @echo 'Kernel packaging:' 1138 @$(MAKE) $(build)=$(package-dir) help 1139 @echo '' 1140 @echo 'Documentation targets:' 1141 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1142 @echo '' 1143 @echo 'Architecture specific targets ($(ARCH)):' 1144 @$(if $(archhelp),$(archhelp),\ 1145 echo ' No architecture specific help defined for $(ARCH)') 1146 @echo '' 1147 @$(if $(boards), \ 1148 $(foreach b, $(boards), \ 1149 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1150 echo '') 1151 1152 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1153 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1154 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1155 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1156 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1157 @echo '' 1158 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1159 @echo 'For further info see the ./README file' 1160 1161 1162# Documentation targets 1163# --------------------------------------------------------------------------- 1164%docs: scripts_basic FORCE 1165 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1166 1167else # KBUILD_EXTMOD 1168 1169### 1170# External module support. 1171# When building external modules the kernel used as basis is considered 1172# read-only, and no consistency checks are made and the make 1173# system is not used on the basis kernel. If updates are required 1174# in the basis kernel ordinary make commands (without M=...) must 1175# be used. 1176# 1177# The following are the only valid targets when building external 1178# modules. 1179# make M=dir clean Delete all automatically generated files 1180# make M=dir modules Make all modules in specified dir 1181# make M=dir Same as 'make M=dir modules' 1182# make M=dir modules_install 1183# Install the modules built in the module directory 1184# Assumes install directory is already created 1185 1186# We are always building modules 1187KBUILD_MODULES := 1 1188PHONY += crmodverdir 1189crmodverdir: 1190 $(Q)mkdir -p $(MODVERDIR) 1191 $(Q)rm -f $(MODVERDIR)/* 1192 1193PHONY += $(objtree)/Module.symvers 1194$(objtree)/Module.symvers: 1195 @test -e $(objtree)/Module.symvers || ( \ 1196 echo; \ 1197 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1198 echo " is missing; modules will have no dependencies and modversions."; \ 1199 echo ) 1200 1201module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1202PHONY += $(module-dirs) modules 1203$(module-dirs): crmodverdir $(objtree)/Module.symvers 1204 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1205 1206modules: $(module-dirs) 1207 @echo ' Building modules, stage 2.'; 1208 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1209 1210PHONY += modules_install 1211modules_install: _emodinst_ _emodinst_post 1212 1213install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1214PHONY += _emodinst_ 1215_emodinst_: 1216 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1217 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1218 1219# Run depmod only is we have System.map and depmod is executable 1220quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1221 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1222 $(DEPMOD) -ae -F System.map \ 1223 $(if $(strip $(INSTALL_MOD_PATH)), \ 1224 -b $(INSTALL_MOD_PATH) -r) \ 1225 $(KERNELRELEASE); \ 1226 fi 1227 1228PHONY += _emodinst_post 1229_emodinst_post: _emodinst_ 1230 $(call cmd,depmod) 1231 1232clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1233 1234PHONY += $(clean-dirs) clean 1235$(clean-dirs): 1236 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1237 1238clean: rm-dirs := $(MODVERDIR) 1239clean: $(clean-dirs) 1240 $(call cmd,rmdirs) 1241 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1242 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1243 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1244 -type f -print | xargs rm -f 1245 1246help: 1247 @echo ' Building external modules.' 1248 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1249 @echo '' 1250 @echo ' modules - default target, build the module(s)' 1251 @echo ' modules_install - install the module' 1252 @echo ' clean - remove generated files in module directory only' 1253 @echo '' 1254 1255# Dummies... 1256PHONY += prepare scripts 1257prepare: ; 1258scripts: ; 1259endif # KBUILD_EXTMOD 1260 1261# Generate tags for editors 1262# --------------------------------------------------------------------------- 1263 1264#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1265#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1266#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1267 1268ifeq ($(src),$(obj)) 1269__srctree = 1270else 1271__srctree = $(srctree)/ 1272endif 1273 1274ifeq ($(ALLSOURCE_ARCHS),) 1275ifeq ($(ARCH),um) 1276ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1277else 1278ALLINCLUDE_ARCHS := $(ARCH) 1279endif 1280else 1281#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1282ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1283endif 1284 1285ALLSOURCE_ARCHS := $(ARCH) 1286 1287define find-sources 1288 ( find $(__srctree) $(RCS_FIND_IGNORE) \ 1289 \( -name include -o -name arch \) -prune -o \ 1290 -name $1 -print; \ 1291 for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1292 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ 1293 -name $1 -print; \ 1294 done ; \ 1295 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1296 -name $1 -print; \ 1297 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1298 \( -name config -o -name 'asm-*' \) -prune \ 1299 -o -name $1 -print; \ 1300 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1301 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ 1302 -name $1 -print; \ 1303 done ; \ 1304 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1305 -name $1 -print ) 1306endef 1307 1308define all-sources 1309 $(call find-sources,'*.[chS]') 1310endef 1311define all-kconfigs 1312 $(call find-sources,'Kconfig*') 1313endef 1314define all-defconfigs 1315 $(call find-sources,'defconfig') 1316endef 1317 1318define xtags 1319 if $1 --version 2>&1 | grep -iq exuberant; then \ 1320 $(all-sources) | xargs $1 -a \ 1321 -I __initdata,__exitdata,__acquires,__releases \ 1322 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1323 --extra=+f --c-kinds=+px \ 1324 --regex-asm='/ENTRY\(([^)]*)\).*/\1/'; \ 1325 $(all-kconfigs) | xargs $1 -a \ 1326 --langdef=kconfig \ 1327 --language-force=kconfig \ 1328 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ 1329 $(all-defconfigs) | xargs -r $1 -a \ 1330 --langdef=dotconfig \ 1331 --language-force=dotconfig \ 1332 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1333 elif $1 --version 2>&1 | grep -iq emacs; then \ 1334 $(all-sources) | xargs $1 -a; \ 1335 $(all-kconfigs) | xargs $1 -a \ 1336 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1337 $(all-defconfigs) | xargs -r $1 -a \ 1338 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1339 else \ 1340 $(all-sources) | xargs $1 -a; \ 1341 fi 1342endef 1343 1344quiet_cmd_cscope-file = FILELST cscope.files 1345 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1346 1347quiet_cmd_cscope = MAKE cscope.out 1348 cmd_cscope = cscope -b 1349 1350cscope: FORCE 1351 $(call cmd,cscope-file) 1352 $(call cmd,cscope) 1353 1354quiet_cmd_TAGS = MAKE $@ 1355define cmd_TAGS 1356 rm -f $@; \ 1357 $(call xtags,etags) 1358endef 1359 1360TAGS: FORCE 1361 $(call cmd,TAGS) 1362 1363quiet_cmd_tags = MAKE $@ 1364define cmd_tags 1365 rm -f $@; \ 1366 $(call xtags,ctags) 1367endef 1368 1369tags: FORCE 1370 $(call cmd,tags) 1371 1372 1373# Scripts to check various things for consistency 1374# --------------------------------------------------------------------------- 1375 1376includecheck: 1377 find * $(RCS_FIND_IGNORE) \ 1378 -name '*.[hcS]' -type f -print | sort \ 1379 | xargs $(PERL) -w scripts/checkincludes.pl 1380 1381versioncheck: 1382 find * $(RCS_FIND_IGNORE) \ 1383 -name '*.[hcS]' -type f -print | sort \ 1384 | xargs $(PERL) -w scripts/checkversion.pl 1385 1386namespacecheck: 1387 $(PERL) $(srctree)/scripts/namespace.pl 1388 1389endif #ifeq ($(config-targets),1) 1390endif #ifeq ($(mixed-targets),1) 1391 1392PHONY += checkstack kernelrelease kernelversion 1393 1394# Use $(SUBARCH) here instead of $(ARCH) so that this works for UML. 1395# In the UML case, $(SUBARCH) is the name of the underlying 1396# architecture, while for all other arches, it is the same as $(ARCH). 1397checkstack: 1398 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1399 $(PERL) $(src)/scripts/checkstack.pl $(SUBARCH) 1400 1401kernelrelease: 1402 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1403 $(error kernelrelease not valid - run 'make prepare' to update it)) 1404kernelversion: 1405 @echo $(KERNELVERSION) 1406 1407# Single targets 1408# --------------------------------------------------------------------------- 1409# Single targets are compatible with: 1410# - build whith mixed source and output 1411# - build with separate output dir 'make O=...' 1412# - external modules 1413# 1414# target-dir => where to store outputfile 1415# build-dir => directory in kernel source tree to use 1416 1417ifeq ($(KBUILD_EXTMOD),) 1418 build-dir = $(patsubst %/,%,$(dir $@)) 1419 target-dir = $(dir $@) 1420else 1421 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1422 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1423 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1424endif 1425 1426%.s: %.c prepare scripts FORCE 1427 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1428%.i: %.c prepare scripts FORCE 1429 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1430%.o: %.c prepare scripts FORCE 1431 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1432%.lst: %.c prepare scripts FORCE 1433 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1434%.s: %.S prepare scripts FORCE 1435 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1436%.o: %.S prepare scripts FORCE 1437 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1438%.symtypes: %.c prepare scripts FORCE 1439 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1440 1441# Modules 1442/ %/: prepare scripts FORCE 1443 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1444 $(build)=$(build-dir) 1445%.ko: prepare scripts FORCE 1446 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1447 $(build)=$(build-dir) $(@:.ko=.o) 1448 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1449 1450# FIXME Should go into a make.lib or something 1451# =========================================================================== 1452 1453quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1454 cmd_rmdirs = rm -rf $(rm-dirs) 1455 1456quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1457 cmd_rmfiles = rm -f $(rm-files) 1458 1459 1460a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1461 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1462 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1463 1464quiet_cmd_as_o_S = AS $@ 1465cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1466 1467# read all saved command lines 1468 1469targets := $(wildcard $(sort $(targets))) 1470cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1471 1472ifneq ($(cmd_files),) 1473 $(cmd_files): ; # Do not try to update included dependency files 1474 include $(cmd_files) 1475endif 1476 1477# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1478# Usage: 1479# $(Q)$(MAKE) $(clean)=dir 1480clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1481 1482endif # skip-makefile 1483 1484PHONY += FORCE 1485FORCE: 1486 1487 1488# Declare the contents of the .PHONY variable as phony. We keep that 1489# information in a variable se we can use it in if_changed and friends. 1490.PHONY: $(PHONY) 1491