1VERSION = 2 2PATCHLEVEL = 6 3SUBLEVEL = 23 4EXTRAVERSION = 5NAME = Arr Matey! A Hairy 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: 14# o use make's built-in rules and variables 15# (this increases performance and avoid hard-to-debug behavour); 16# o print "Entering directory ..."; 17MAKEFLAGS += -rR --no-print-directory 18 19# We are using a recursive build, so we need to do a little thinking 20# to get the ordering right. 21# 22# Most importantly: sub-Makefiles should only ever modify files in 23# their own directory. If in some directory we have a dependency on 24# a file in another dir (which doesn't happen often, but it's often 25# unavoidable when linking the built-in.o targets which finally 26# turn into vmlinux), we will call a sub make in that other dir, and 27# after that we are sure that everything which is in that other dir 28# is now up to date. 29# 30# The only cases where we need to modify files which have global 31# effects are thus separated out and done before the recursive 32# descending is started. They are now explicitly listed as the 33# prepare rule. 34 35# To put more focus on warnings, be less verbose as default 36# Use 'make V=1' to see the full commands 37 38ifdef V 39 ifeq ("$(origin V)", "command line") 40 KBUILD_VERBOSE = $(V) 41 endif 42endif 43ifndef KBUILD_VERBOSE 44 KBUILD_VERBOSE = 0 45endif 46 47# Call a source code checker (by default, "sparse") as part of the 48# C compilation. 49# 50# Use 'make C=1' to enable checking of only re-compiled files. 51# Use 'make C=2' to enable checking of *all* source files, regardless 52# of whether they are re-compiled or not. 53# 54# See the file "Documentation/sparse.txt" for more details, including 55# where to get the "sparse" utility. 56 57ifdef C 58 ifeq ("$(origin C)", "command line") 59 KBUILD_CHECKSRC = $(C) 60 endif 61endif 62ifndef KBUILD_CHECKSRC 63 KBUILD_CHECKSRC = 0 64endif 65 66# Use make M=dir to specify directory of external module to build 67# Old syntax make ... SUBDIRS=$PWD is still supported 68# Setting the environment variable KBUILD_EXTMOD take precedence 69ifdef SUBDIRS 70 KBUILD_EXTMOD ?= $(SUBDIRS) 71endif 72ifdef M 73 ifeq ("$(origin M)", "command line") 74 KBUILD_EXTMOD := $(M) 75 endif 76endif 77 78 79# kbuild supports saving output files in a separate directory. 80# To locate output files in a separate directory two syntaxes are supported. 81# In both cases the working directory must be the root of the kernel src. 82# 1) O= 83# Use "make O=dir/to/store/output/files/" 84# 85# 2) Set KBUILD_OUTPUT 86# Set the environment variable KBUILD_OUTPUT to point to the directory 87# where the output files shall be placed. 88# export KBUILD_OUTPUT=dir/to/store/output/files/ 89# make 90# 91# The O= assignment takes precedence over the KBUILD_OUTPUT environment 92# variable. 93 94 95# KBUILD_SRC is set on invocation of make in OBJ directory 96# KBUILD_SRC is not intended to be used by the regular user (for now) 97ifeq ($(KBUILD_SRC),) 98 99# OK, Make called in directory where kernel src resides 100# Do we want to locate output files in a separate directory? 101ifdef O 102 ifeq ("$(origin O)", "command line") 103 KBUILD_OUTPUT := $(O) 104 endif 105endif 106 107# That's our default target when none is given on the command line 108PHONY := _all 109_all: 110 111ifneq ($(KBUILD_OUTPUT),) 112# Invoke a second make in the output directory, passing relevant variables 113# check that the output directory actually exists 114saved-output := $(KBUILD_OUTPUT) 115KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) 116$(if $(KBUILD_OUTPUT),, \ 117 $(error output directory "$(saved-output)" does not exist)) 118# Check that OUTPUT directory is not the same as where we have kernel src 119$(if $(filter-out $(KBUILD_OUTPUT),$(shell /bin/pwd)),, \ 120 $(error Output directory (O=...) specifies kernel src dir)) 121 122PHONY += $(MAKECMDGOALS) sub-make 123 124$(filter-out _all sub-make,$(MAKECMDGOALS)) _all: sub-make 125 $(Q)@: 126 127sub-make: FORCE 128 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ 129 KBUILD_SRC=$(CURDIR) \ 130 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \ 131 $(filter-out _all sub-make,$(MAKECMDGOALS)) 132 133# Leave processing to above invocation of make 134skip-makefile := 1 135endif # ifneq ($(KBUILD_OUTPUT),) 136endif # ifeq ($(KBUILD_SRC),) 137 138# We process the rest of the Makefile if this is the final invocation of make 139ifeq ($(skip-makefile),) 140 141# If building an external module we do not care about the all: rule 142# but instead _all depend on modules 143PHONY += all 144ifeq ($(KBUILD_EXTMOD),) 145_all: all 146else 147_all: modules 148endif 149 150srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) 151TOPDIR := $(srctree) 152# FIXME - TOPDIR is obsolete, use srctree/objtree 153objtree := $(CURDIR) 154src := $(srctree) 155obj := $(objtree) 156 157VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) 158 159export srctree objtree VPATH TOPDIR 160 161 162# SUBARCH tells the usermode build what the underlying arch is. That is set 163# first, and if a usermode build is happening, the "ARCH=um" on the command 164# line overrides the setting of ARCH below. If a native build is happening, 165# then ARCH is assigned, getting whatever value it gets normally, and 166# SUBARCH is subsequently ignored. 167 168SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ 169 -e s/arm.*/arm/ -e s/sa110/arm/ \ 170 -e s/s390x/s390/ -e s/parisc64/parisc/ \ 171 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ ) 172 173# Cross compiling and selecting different set of gcc/bin-utils 174# --------------------------------------------------------------------------- 175# 176# When performing cross compilation for other architectures ARCH shall be set 177# to the target architecture. (See arch/* for the possibilities). 178# ARCH can be set during invocation of make: 179# make ARCH=ia64 180# Another way is to have ARCH set in the environment. 181# The default ARCH is the host where make is executed. 182 183# CROSS_COMPILE specify the prefix used for all executables used 184# during compilation. Only gcc and related bin-utils executables 185# are prefixed with $(CROSS_COMPILE). 186# CROSS_COMPILE can be set on the command line 187# make CROSS_COMPILE=ia64-linux- 188# Alternatively CROSS_COMPILE can be set in the environment. 189# Default value for CROSS_COMPILE is not to prefix executables 190# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile 191 192ARCH ?= $(SUBARCH) 193CROSS_COMPILE ?= 194 195# Architecture as present in compile.h 196UTS_MACHINE := $(ARCH) 197SRCARCH := $(ARCH) 198 199KCONFIG_CONFIG ?= .config 200 201# SHELL used by kbuild 202CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 203 else if [ -x /bin/bash ]; then echo /bin/bash; \ 204 else echo sh; fi ; fi) 205 206HOSTCC = gcc 207HOSTCXX = g++ 208HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 209HOSTCXXFLAGS = -O2 210 211# Decide whether to build built-in, modular, or both. 212# Normally, just do built-in. 213 214KBUILD_MODULES := 215KBUILD_BUILTIN := 1 216 217# If we have only "make modules", don't compile built-in objects. 218# When we're building modules with modversions, we need to consider 219# the built-in objects during the descend as well, in order to 220# make sure the checksums are up to date before we record them. 221 222ifeq ($(MAKECMDGOALS),modules) 223 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) 224endif 225 226# If we have "make <whatever> modules", compile modules 227# in addition to whatever we do anyway. 228# Just "make" or "make all" shall build modules as well 229 230ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) 231 KBUILD_MODULES := 1 232endif 233 234ifeq ($(MAKECMDGOALS),) 235 KBUILD_MODULES := 1 236endif 237 238export KBUILD_MODULES KBUILD_BUILTIN 239export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD 240 241# Beautify output 242# --------------------------------------------------------------------------- 243# 244# Normally, we echo the whole command before executing it. By making 245# that echo $($(quiet)$(cmd)), we now have the possibility to set 246# $(quiet) to choose other forms of output instead, e.g. 247# 248# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ 249# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< 250# 251# If $(quiet) is empty, the whole command will be printed. 252# If it is set to "quiet_", only the short version will be printed. 253# If it is set to "silent_", nothing will be printed at all, since 254# the variable $(silent_cmd_cc_o_c) doesn't exist. 255# 256# A simple variant is to prefix commands with $(Q) - that's useful 257# for commands that shall be hidden in non-verbose mode. 258# 259# $(Q)ln $@ :< 260# 261# If KBUILD_VERBOSE equals 0 then the above command will be hidden. 262# If KBUILD_VERBOSE equals 1 then the above command is displayed. 263 264ifeq ($(KBUILD_VERBOSE),1) 265 quiet = 266 Q = 267else 268 quiet=quiet_ 269 Q = @ 270endif 271 272# If the user is running make -s (silent mode), suppress echoing of 273# commands 274 275ifneq ($(findstring s,$(MAKEFLAGS)),) 276 quiet=silent_ 277endif 278 279export quiet Q KBUILD_VERBOSE 280 281 282# Look for make include files relative to root of kernel src 283MAKEFLAGS += --include-dir=$(srctree) 284 285# We need some generic definitions. 286include $(srctree)/scripts/Kbuild.include 287 288# Make variables (CC, etc...) 289 290AS = $(CROSS_COMPILE)as 291LD = $(CROSS_COMPILE)ld 292CC = $(CROSS_COMPILE)gcc 293CPP = $(CC) -E 294AR = $(CROSS_COMPILE)ar 295NM = $(CROSS_COMPILE)nm 296STRIP = $(CROSS_COMPILE)strip 297OBJCOPY = $(CROSS_COMPILE)objcopy 298OBJDUMP = $(CROSS_COMPILE)objdump 299AWK = awk 300GENKSYMS = scripts/genksyms/genksyms 301DEPMOD = /sbin/depmod 302KALLSYMS = scripts/kallsyms 303PERL = perl 304CHECK = sparse 305 306CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) 307MODFLAGS = -DMODULE 308CFLAGS_MODULE = $(MODFLAGS) 309AFLAGS_MODULE = $(MODFLAGS) 310LDFLAGS_MODULE = 311CFLAGS_KERNEL = 312AFLAGS_KERNEL = 313 314 315# Use LINUXINCLUDE when you must reference the include/ directory. 316# Needed to be compatible with the O= option 317LINUXINCLUDE := -Iinclude \ 318 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ 319 -include include/linux/autoconf.h 320 321CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) 322 323KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ 324 -fno-strict-aliasing -fno-common \ 325 -Werror-implicit-function-declaration 326AFLAGS := -D__ASSEMBLY__ 327 328# Read KERNELRELEASE from include/config/kernel.release (if it exists) 329KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) 330KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) 331 332export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION 333export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC 334export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE 335export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS 336 337export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS 338export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 339export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE 340 341# When compiling out-of-tree modules, put MODVERDIR in the module 342# tree rather than in the kernel tree. The kernel tree might 343# even be read-only. 344export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions 345 346# Files to ignore in find ... statements 347 348RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o 349export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git 350 351# =========================================================================== 352# Rules shared between *config targets and build targets 353 354# Basic helpers built in scripts/ 355PHONY += scripts_basic 356scripts_basic: 357 $(Q)$(MAKE) $(build)=scripts/basic 358 359# To avoid any implicit rule to kick in, define an empty command. 360scripts/basic/%: scripts_basic ; 361 362PHONY += outputmakefile 363# outputmakefile generates a Makefile in the output directory, if using a 364# separate output directory. This allows convenient use of make in the 365# output directory. 366outputmakefile: 367ifneq ($(KBUILD_SRC),) 368 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ 369 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) 370endif 371 372# To make sure we do not include .config for any of the *config targets 373# catch them early, and hand them over to scripts/kconfig/Makefile 374# It is allowed to specify more targets when calling make, including 375# mixing *config targets and build targets. 376# For example 'make oldconfig all'. 377# Detect when mixed targets is specified, and make a second invocation 378# of make so .config is not included in this case either (for *config). 379 380no-dot-config-targets := clean mrproper distclean \ 381 cscope TAGS tags help %docs check% \ 382 include/linux/version.h headers_% \ 383 kernelrelease kernelversion 384 385config-targets := 0 386mixed-targets := 0 387dot-config := 1 388 389ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) 390 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) 391 dot-config := 0 392 endif 393endif 394 395ifeq ($(KBUILD_EXTMOD),) 396 ifneq ($(filter config %config,$(MAKECMDGOALS)),) 397 config-targets := 1 398 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) 399 mixed-targets := 1 400 endif 401 endif 402endif 403 404ifeq ($(mixed-targets),1) 405# =========================================================================== 406# We're called with mixed targets (*config and build targets). 407# Handle them one by one. 408 409%:: FORCE 410 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ 411 412else 413ifeq ($(config-targets),1) 414# =========================================================================== 415# *config targets only - make sure prerequisites are updated, and descend 416# in scripts/kconfig to make the *config target 417 418# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. 419# KBUILD_DEFCONFIG may point out an alternative default configuration 420# used for 'make defconfig' 421include $(srctree)/arch/$(ARCH)/Makefile 422export KBUILD_DEFCONFIG 423 424config %config: scripts_basic outputmakefile FORCE 425 $(Q)mkdir -p include/linux include/config 426 $(Q)$(MAKE) $(build)=scripts/kconfig $@ 427 428else 429# =========================================================================== 430# Build targets only - this includes vmlinux, arch specific targets, clean 431# targets and others. In general all targets except *config targets. 432 433ifeq ($(KBUILD_EXTMOD),) 434# Additional helpers built in scripts/ 435# Carefully list dependencies so we do not try to build scripts twice 436# in parallel 437PHONY += scripts 438scripts: scripts_basic include/config/auto.conf 439 $(Q)$(MAKE) $(build)=$(@) 440 441# Objects we will link into vmlinux / subdirs we need to visit 442init-y := init/ 443drivers-y := drivers/ sound/ 444net-y := net/ 445libs-y := lib/ 446core-y := usr/ 447endif # KBUILD_EXTMOD 448 449ifeq ($(dot-config),1) 450# Read in config 451-include include/config/auto.conf 452 453ifeq ($(KBUILD_EXTMOD),) 454# Read in dependencies to all Kconfig* files, make sure to run 455# oldconfig if changes are detected. 456-include include/config/auto.conf.cmd 457 458# To avoid any implicit rule to kick in, define an empty command 459$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; 460 461# If .config is newer than include/config/auto.conf, someone tinkered 462# with it and forgot to run make oldconfig. 463# if auto.conf.cmd is missing then we are probably in a cleaned tree so 464# we execute the config step to be sure to catch updated Kconfig files 465include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd 466 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig 467else 468# external modules needs include/linux/autoconf.h and include/config/auto.conf 469# but do not care if they are up-to-date. Use auto.conf to trigger the test 470PHONY += include/config/auto.conf 471 472include/config/auto.conf: 473 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \ 474 echo; \ 475 echo " ERROR: Kernel configuration is invalid."; \ 476 echo " include/linux/autoconf.h or $@ are missing."; \ 477 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ 478 echo; \ 479 /bin/false) 480 481endif # KBUILD_EXTMOD 482 483else 484# Dummy target needed, because used as prerequisite 485include/config/auto.conf: ; 486endif # $(dot-config) 487 488# The all: target is the default when no target is given on the 489# command line. 490# This allow a user to issue only 'make' to build a kernel including modules 491# Defaults vmlinux but it is usually overridden in the arch makefile 492all: vmlinux 493 494ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE 495KBUILD_CFLAGS += -Os 496else 497KBUILD_CFLAGS += -O2 498endif 499 500include $(srctree)/arch/$(ARCH)/Makefile 501 502ifdef CONFIG_FRAME_POINTER 503KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls 504else 505KBUILD_CFLAGS += -fomit-frame-pointer 506endif 507 508ifdef CONFIG_DEBUG_INFO 509KBUILD_CFLAGS += -g 510AFLAGS += -gdwarf-2 511endif 512 513# Force gcc to behave correct even for buggy distributions 514KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector) 515 516# arch Makefile may override CC so keep this after arch Makefile is included 517NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) 518CHECKFLAGS += $(NOSTDINC_FLAGS) 519 520# warn about C99 declaration after statement 521KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) 522 523# disable pointer signed / unsigned warnings in gcc 4.0 524KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,) 525 526# Use --build-id when available. 527LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\ 528 $(call ld-option, -Wl$(comma)--build-id,)) 529LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) 530LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) 531 532# Default kernel image to build when no specific target is given. 533# KBUILD_IMAGE may be overruled on the command line or 534# set in the environment 535# Also any assignments in arch/$(ARCH)/Makefile take precedence over 536# this default value 537export KBUILD_IMAGE ?= vmlinux 538 539# 540# INSTALL_PATH specifies where to place the updated kernel and system map 541# images. Default is /boot, but you can set it to other values 542export INSTALL_PATH ?= /boot 543 544# 545# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory 546# relocations required by build roots. This is not defined in the 547# makefile but the argument can be passed to make if needed. 548# 549 550MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) 551export MODLIB 552 553# 554# INSTALL_MOD_STRIP, if defined, will cause modules to be 555# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then 556# the default option --strip-debug will be used. Otherwise, 557# INSTALL_MOD_STRIP will used as the options to the strip command. 558 559ifdef INSTALL_MOD_STRIP 560ifeq ($(INSTALL_MOD_STRIP),1) 561mod_strip_cmd = $(STRIP) --strip-debug 562else 563mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) 564endif # INSTALL_MOD_STRIP=1 565else 566mod_strip_cmd = true 567endif # INSTALL_MOD_STRIP 568export mod_strip_cmd 569 570 571ifeq ($(KBUILD_EXTMOD),) 572core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ 573 574vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ 575 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ 576 $(net-y) $(net-m) $(libs-y) $(libs-m))) 577 578vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ 579 $(init-n) $(init-) \ 580 $(core-n) $(core-) $(drivers-n) $(drivers-) \ 581 $(net-n) $(net-) $(libs-n) $(libs-)))) 582 583init-y := $(patsubst %/, %/built-in.o, $(init-y)) 584core-y := $(patsubst %/, %/built-in.o, $(core-y)) 585drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) 586net-y := $(patsubst %/, %/built-in.o, $(net-y)) 587libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) 588libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) 589libs-y := $(libs-y1) $(libs-y2) 590 591# Build vmlinux 592# --------------------------------------------------------------------------- 593# vmlinux is built from the objects selected by $(vmlinux-init) and 594# $(vmlinux-main). Most are built-in.o files from top-level directories 595# in the kernel tree, others are specified in arch/$(ARCH)/Makefile. 596# Ordering when linking is important, and $(vmlinux-init) must be first. 597# 598# vmlinux 599# ^ 600# | 601# +-< $(vmlinux-init) 602# | +--< init/version.o + more 603# | 604# +--< $(vmlinux-main) 605# | +--< driver/built-in.o mm/built-in.o + more 606# | 607# +-< kallsyms.o (see description in CONFIG_KALLSYMS section) 608# 609# vmlinux version (uname -v) cannot be updated during normal 610# descending-into-subdirs phase since we do not yet know if we need to 611# update vmlinux. 612# Therefore this step is delayed until just before final link of vmlinux - 613# except in the kallsyms case where it is done just before adding the 614# symbols to the kernel. 615# 616# System.map is generated to document addresses of all kernel symbols 617 618vmlinux-init := $(head-y) $(init-y) 619vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) 620vmlinux-all := $(vmlinux-init) $(vmlinux-main) 621vmlinux-lds := arch/$(SRCARCH)/kernel/vmlinux.lds 622export KBUILD_VMLINUX_OBJS := $(vmlinux-all) 623 624# Rule to link vmlinux - also used during CONFIG_KALLSYMS 625# May be overridden by arch/$(ARCH)/Makefile 626quiet_cmd_vmlinux__ ?= LD $@ 627 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ 628 -T $(vmlinux-lds) $(vmlinux-init) \ 629 --start-group $(vmlinux-main) --end-group \ 630 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^) 631 632# Generate new vmlinux version 633quiet_cmd_vmlinux_version = GEN .version 634 cmd_vmlinux_version = set -e; \ 635 if [ ! -r .version ]; then \ 636 rm -f .version; \ 637 echo 1 >.version; \ 638 else \ 639 mv .version .old_version; \ 640 expr 0$$(cat .old_version) + 1 >.version; \ 641 fi; \ 642 $(MAKE) $(build)=init 643 644# Generate System.map 645quiet_cmd_sysmap = SYSMAP 646 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap 647 648# Link of vmlinux 649# If CONFIG_KALLSYMS is set .version is already updated 650# Generate System.map and verify that the content is consistent 651# Use + in front of the vmlinux_version rule to silent warning with make -j2 652# First command is ':' to allow us to use + in front of the rule 653define rule_vmlinux__ 654 : 655 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) 656 657 $(call cmd,vmlinux__) 658 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 659 660 $(Q)$(if $($(quiet)cmd_sysmap), \ 661 echo ' $($(quiet)cmd_sysmap) System.map' &&) \ 662 $(cmd_sysmap) $@ System.map; \ 663 if [ $$? -ne 0 ]; then \ 664 rm -f $@; \ 665 /bin/false; \ 666 fi; 667 $(verify_kallsyms) 668endef 669 670 671ifdef CONFIG_KALLSYMS 672# Generate section listing all symbols and add it into vmlinux $(kallsyms.o) 673# It's a three stage process: 674# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is 675# empty 676# Running kallsyms on that gives us .tmp_kallsyms1.o with 677# the right size - vmlinux version (uname -v) is updated during this step 678# o .tmp_vmlinux2 now has a __kallsyms section of the right size, 679# but due to the added section, some addresses have shifted. 680# From here, we generate a correct .tmp_kallsyms2.o 681# o The correct .tmp_kallsyms2.o is linked into the final vmlinux. 682# o Verify that the System.map from vmlinux matches the map from 683# .tmp_vmlinux2, just in case we did not generate kallsyms correctly. 684# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using 685# .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a 686# temporary bypass to allow the kernel to be built while the 687# maintainers work out what went wrong with kallsyms. 688 689ifdef CONFIG_KALLSYMS_EXTRA_PASS 690last_kallsyms := 3 691else 692last_kallsyms := 2 693endif 694 695kallsyms.o := .tmp_kallsyms$(last_kallsyms).o 696 697define verify_kallsyms 698 $(Q)$(if $($(quiet)cmd_sysmap), \ 699 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ 700 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map 701 $(Q)cmp -s System.map .tmp_System.map || \ 702 (echo Inconsistent kallsyms data; \ 703 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ 704 rm .tmp_kallsyms* ; /bin/false ) 705endef 706 707# Update vmlinux version before link 708# Use + in front of this rule to silent warning about make -j1 709# First command is ':' to allow us to use + in front of this rule 710cmd_ksym_ld = $(cmd_vmlinux__) 711define rule_ksym_ld 712 : 713 +$(call cmd,vmlinux_version) 714 $(call cmd,vmlinux__) 715 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd 716endef 717 718# Generate .S file with all kernel symbols 719quiet_cmd_kallsyms = KSYM $@ 720 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ 721 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ 722 723.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE 724 $(call if_changed_dep,as_o_S) 725 726.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) 727 $(call cmd,kallsyms) 728 729# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version 730.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE 731 $(call if_changed_rule,ksym_ld) 732 733.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE 734 $(call if_changed,vmlinux__) 735 736.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE 737 $(call if_changed,vmlinux__) 738 739# Needs to visit scripts/ before $(KALLSYMS) can be used. 740$(KALLSYMS): scripts ; 741 742# Generate some data for debugging strange kallsyms problems 743debug_kallsyms: .tmp_map$(last_kallsyms) 744 745.tmp_map%: .tmp_vmlinux% FORCE 746 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ 747 748.tmp_map3: .tmp_map2 749 750.tmp_map2: .tmp_map1 751 752endif # ifdef CONFIG_KALLSYMS 753 754# Do modpost on a prelinked vmlinux. The finally linked vmlinux has 755# relevant sections renamed as per the linker script. 756quiet_cmd_vmlinux-modpost = LD $@ 757 cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@ \ 758 $(vmlinux-init) --start-group $(vmlinux-main) --end-group \ 759 $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^) 760define rule_vmlinux-modpost 761 : 762 +$(call cmd,vmlinux-modpost) 763 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ 764 $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd 765endef 766 767# vmlinux image - including updated kernel symbols 768vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE 769ifdef CONFIG_HEADERS_CHECK 770 $(Q)$(MAKE) -f $(srctree)/Makefile headers_check 771endif 772 $(call vmlinux-modpost) 773 $(call if_changed_rule,vmlinux__) 774 $(Q)rm -f .old_version 775 776vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE 777 $(call if_changed_rule,vmlinux-modpost) 778 779# The actual objects are generated when descending, 780# make sure no implicit rule kicks in 781$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; 782 783# Handle descending into subdirectories listed in $(vmlinux-dirs) 784# Preset locale variables to speed up the build process. Limit locale 785# tweaks to this spot to avoid wrong language settings when running 786# make menuconfig etc. 787# Error messages still appears in the original language 788 789PHONY += $(vmlinux-dirs) 790$(vmlinux-dirs): prepare scripts 791 $(Q)$(MAKE) $(build)=$@ 792 793# Build the kernel release string 794# 795# The KERNELRELEASE value built here is stored in the file 796# include/config/kernel.release, and is used when executing several 797# make targets, such as "make install" or "make modules_install." 798# 799# The eventual kernel release string consists of the following fields, 800# shown in a hierarchical format to show how smaller parts are concatenated 801# to form the larger and final value, with values coming from places like 802# the Makefile, kernel config options, make command line options and/or 803# SCM tag information. 804# 805# $(KERNELVERSION) 806# $(VERSION) eg, 2 807# $(PATCHLEVEL) eg, 6 808# $(SUBLEVEL) eg, 18 809# $(EXTRAVERSION) eg, -rc6 810# $(localver-full) 811# $(localver) 812# localversion* (files without backups, containing '~') 813# $(CONFIG_LOCALVERSION) (from kernel config setting) 814# $(localver-auto) (only if CONFIG_LOCALVERSION_AUTO is set) 815# ./scripts/setlocalversion (SCM tag, if one exists) 816# $(LOCALVERSION) (from make command line if provided) 817# 818# Note how the final $(localver-auto) string is included *only* if the 819# kernel config option CONFIG_LOCALVERSION_AUTO is selected. Also, at the 820# moment, only git is supported but other SCMs can edit the script 821# scripts/setlocalversion and add the appropriate checks as needed. 822 823pattern = ".*/localversion[^~]*" 824string = $(shell cat /dev/null \ 825 `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`) 826 827localver = $(subst $(space),, $(string) \ 828 $(patsubst "%",%,$(CONFIG_LOCALVERSION))) 829 830# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called 831# and if the SCM is know a tag from the SCM is appended. 832# The appended tag is determined by the SCM used. 833# 834# Currently, only git is supported. 835# Other SCMs can edit scripts/setlocalversion and add the appropriate 836# checks as needed. 837ifdef CONFIG_LOCALVERSION_AUTO 838 _localver-auto = $(shell $(CONFIG_SHELL) \ 839 $(srctree)/scripts/setlocalversion $(srctree)) 840 localver-auto = $(LOCALVERSION)$(_localver-auto) 841endif 842 843localver-full = $(localver)$(localver-auto) 844 845# Store (new) KERNELRELASE string in include/config/kernel.release 846kernelrelease = $(KERNELVERSION)$(localver-full) 847include/config/kernel.release: include/config/auto.conf FORCE 848 $(Q)rm -f $@ 849 $(Q)echo $(kernelrelease) > $@ 850 851 852# Things we need to do before we recursively start building the kernel 853# or the modules are listed in "prepare". 854# A multi level approach is used. prepareN is processed before prepareN-1. 855# archprepare is used in arch Makefiles and when processed asm symlink, 856# version.h and scripts_basic is processed / created. 857 858# Listed in dependency order 859PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3 860 861# prepare3 is used to check if we are building in a separate output directory, 862# and if so do: 863# 1) Check that make has not been executed in the kernel src $(srctree) 864# 2) Create the include2 directory, used for the second asm symlink 865prepare3: include/config/kernel.release 866ifneq ($(KBUILD_SRC),) 867 @echo ' Using $(srctree) as source for kernel' 868 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ 869 echo " $(srctree) is not clean, please run 'make mrproper'";\ 870 echo " in the '$(srctree)' directory.";\ 871 /bin/false; \ 872 fi; 873 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; 874 $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm 875endif 876 877# prepare2 creates a makefile if using a separate output directory 878prepare2: prepare3 outputmakefile 879 880prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \ 881 include/asm include/config/auto.conf 882ifneq ($(KBUILD_MODULES),) 883 $(Q)mkdir -p $(MODVERDIR) 884 $(Q)rm -f $(MODVERDIR)/* 885endif 886 887archprepare: prepare1 scripts_basic 888 889prepare0: archprepare FORCE 890 $(Q)$(MAKE) $(build)=. 891 $(Q)$(MAKE) $(build)=. missing-syscalls 892 893# All the preparing.. 894prepare: prepare0 895 896# Leave this as default for preprocessing vmlinux.lds.S, which is now 897# done in arch/$(ARCH)/kernel/Makefile 898 899export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) 900 901# FIXME: The asm symlink changes when $(ARCH) changes. That's 902# hard to detect, but I suppose "make mrproper" is a good idea 903# before switching between archs anyway. 904 905include/asm: 906 @echo ' SYMLINK $@ -> include/asm-$(SRCARCH)' 907 $(Q)if [ ! -d include ]; then mkdir -p include; fi; 908 @ln -fsn asm-$(SRCARCH) $@ 909 910# Generate some files 911# --------------------------------------------------------------------------- 912 913# KERNELRELEASE can change from a few different places, meaning version.h 914# needs to be updated, so this check is forced on all builds 915 916uts_len := 64 917define filechk_utsrelease.h 918 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ 919 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ 920 exit 1; \ 921 fi; \ 922 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";) 923endef 924 925define filechk_version.h 926 (echo \#define LINUX_VERSION_CODE $(shell \ 927 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ 928 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) 929endef 930 931include/linux/version.h: $(srctree)/Makefile FORCE 932 $(call filechk,version.h) 933 934include/linux/utsrelease.h: include/config/kernel.release FORCE 935 $(call filechk,utsrelease.h) 936 937# --------------------------------------------------------------------------- 938 939PHONY += depend dep 940depend dep: 941 @echo '*** Warning: make $@ is unnecessary now.' 942 943# --------------------------------------------------------------------------- 944# Kernel headers 945INSTALL_HDR_PATH=$(objtree)/usr 946export INSTALL_HDR_PATH 947 948HDRFILTER=generic i386 x86_64 949HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild))) 950 951PHONY += headers_install_all 952headers_install_all: include/linux/version.h scripts_basic FORCE 953 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 954 $(Q)for arch in $(HDRARCHES); do \ 955 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\ 956 done 957 958PHONY += headers_install 959headers_install: include/linux/version.h scripts_basic FORCE 960 @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 961 echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \ 962 exit 1 ; fi 963 $(Q)$(MAKE) $(build)=scripts scripts/unifdef 964 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include 965 966PHONY += headers_check_all 967headers_check_all: headers_install_all 968 $(Q)for arch in $(HDRARCHES); do \ 969 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\ 970 done 971 972PHONY += headers_check 973headers_check: headers_install 974 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1 975 976# --------------------------------------------------------------------------- 977# Modules 978 979ifdef CONFIG_MODULES 980 981# By default, build modules as well 982 983all: modules 984 985# Build modules 986 987PHONY += modules 988modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) 989 @echo ' Building modules, stage 2.'; 990 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 991 992 993# Target to prepare building external modules 994PHONY += modules_prepare 995modules_prepare: prepare scripts 996 997# Target to install modules 998PHONY += modules_install 999modules_install: _modinst_ _modinst_post 1000 1001PHONY += _modinst_ 1002_modinst_: 1003 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ 1004 echo "Warning: you may need to install module-init-tools"; \ 1005 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ 1006 sleep 1; \ 1007 fi 1008 @rm -rf $(MODLIB)/kernel 1009 @rm -f $(MODLIB)/source 1010 @mkdir -p $(MODLIB)/kernel 1011 @ln -s $(srctree) $(MODLIB)/source 1012 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ 1013 rm -f $(MODLIB)/build ; \ 1014 ln -s $(objtree) $(MODLIB)/build ; \ 1015 fi 1016 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1017 1018# If System.map exists, run depmod. This deliberately does not have a 1019# dependency on System.map since that would run the dependency tree on 1020# vmlinux. This depmod is only for convenience to give the initial 1021# boot a modules.dep even before / is mounted read-write. However the 1022# boot script depmod is the master version. 1023ifeq "$(strip $(INSTALL_MOD_PATH))" "" 1024depmod_opts := 1025else 1026depmod_opts := -b $(INSTALL_MOD_PATH) -r 1027endif 1028PHONY += _modinst_post 1029_modinst_post: _modinst_ 1030 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi 1031 1032else # CONFIG_MODULES 1033 1034# Modules not configured 1035# --------------------------------------------------------------------------- 1036 1037modules modules_install: FORCE 1038 @echo 1039 @echo "The present kernel configuration has modules disabled." 1040 @echo "Type 'make config' and enable loadable module support." 1041 @echo "Then build a kernel with module support enabled." 1042 @echo 1043 @exit 1 1044 1045endif # CONFIG_MODULES 1046 1047### 1048# Cleaning is done on three levels. 1049# make clean Delete most generated files 1050# Leave enough to build external modules 1051# make mrproper Delete the current configuration, and all generated files 1052# make distclean Remove editor backup files, patch leftover files and the like 1053 1054# Directories & files removed with 'make clean' 1055CLEAN_DIRS += $(MODVERDIR) 1056CLEAN_FILES += vmlinux System.map \ 1057 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map 1058 1059# Directories & files removed with 'make mrproper' 1060MRPROPER_DIRS += include/config include2 usr/include 1061MRPROPER_FILES += .config .config.old include/asm .version .old_version \ 1062 include/linux/autoconf.h include/linux/version.h \ 1063 include/linux/utsrelease.h \ 1064 Module.symvers tags TAGS cscope* 1065 1066# clean - Delete most, but leave enough to build external modules 1067# 1068clean: rm-dirs := $(CLEAN_DIRS) 1069clean: rm-files := $(CLEAN_FILES) 1070clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) 1071 1072PHONY += $(clean-dirs) clean archclean 1073$(clean-dirs): 1074 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1075 1076clean: archclean $(clean-dirs) 1077 $(call cmd,rmdirs) 1078 $(call cmd,rmfiles) 1079 @find . $(RCS_FIND_IGNORE) \ 1080 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1081 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ 1082 -o -name '*.symtypes' \) \ 1083 -type f -print | xargs rm -f 1084 1085# mrproper - Delete all generated files, including .config 1086# 1087mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) 1088mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) 1089mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) 1090 1091PHONY += $(mrproper-dirs) mrproper archmrproper 1092$(mrproper-dirs): 1093 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) 1094 1095mrproper: clean archmrproper $(mrproper-dirs) 1096 $(call cmd,rmdirs) 1097 $(call cmd,rmfiles) 1098 1099# distclean 1100# 1101PHONY += distclean 1102 1103distclean: mrproper 1104 @find $(srctree) $(RCS_FIND_IGNORE) \ 1105 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ 1106 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ 1107 -o -name '.*.rej' -o -size 0 \ 1108 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ 1109 -type f -print | xargs rm -f 1110 1111 1112# Packaging of the kernel to various formats 1113# --------------------------------------------------------------------------- 1114# rpm target kept for backward compatibility 1115package-dir := $(srctree)/scripts/package 1116 1117%pkg: include/config/kernel.release FORCE 1118 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1119rpm: include/config/kernel.release FORCE 1120 $(Q)$(MAKE) $(build)=$(package-dir) $@ 1121 1122 1123# Brief documentation of the typical targets used 1124# --------------------------------------------------------------------------- 1125 1126boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) 1127boards := $(notdir $(boards)) 1128 1129help: 1130 @echo 'Cleaning targets:' 1131 @echo ' clean - Remove most generated files but keep the config and' 1132 @echo ' enough build support to build external modules' 1133 @echo ' mrproper - Remove all generated files + config + various backup files' 1134 @echo ' distclean - mrproper + remove editor backup and patch files' 1135 @echo '' 1136 @echo 'Configuration targets:' 1137 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help 1138 @echo '' 1139 @echo 'Other generic targets:' 1140 @echo ' all - Build all targets marked with [*]' 1141 @echo '* vmlinux - Build the bare kernel' 1142 @echo '* modules - Build all modules' 1143 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' 1144 @echo ' dir/ - Build all files in dir and below' 1145 @echo ' dir/file.[ois] - Build specified target only' 1146 @echo ' dir/file.ko - Build module including final link' 1147 @echo ' rpm - Build a kernel as an RPM package' 1148 @echo ' tags/TAGS - Generate tags file for editors' 1149 @echo ' cscope - Generate cscope index' 1150 @echo ' kernelrelease - Output the release version string' 1151 @echo ' kernelversion - Output the version stored in Makefile' 1152 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1153 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ 1154 echo ' (default: $(INSTALL_HDR_PATH))'; \ 1155 fi 1156 @echo '' 1157 @echo 'Static analysers' 1158 @echo ' checkstack - Generate a list of stack hogs' 1159 @echo ' namespacecheck - Name space analysis on compiled kernel' 1160 @echo ' export_report - List the usages of all exported symbols' 1161 @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \ 1162 echo ' headers_check - Sanity check on exported headers'; \ 1163 fi 1164 @echo '' 1165 @echo 'Kernel packaging:' 1166 @$(MAKE) $(build)=$(package-dir) help 1167 @echo '' 1168 @echo 'Documentation targets:' 1169 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp 1170 @echo '' 1171 @echo 'Architecture specific targets ($(ARCH)):' 1172 @$(if $(archhelp),$(archhelp),\ 1173 echo ' No architecture specific help defined for $(ARCH)') 1174 @echo '' 1175 @$(if $(boards), \ 1176 $(foreach b, $(boards), \ 1177 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ 1178 echo '') 1179 1180 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' 1181 @echo ' make V=2 [targets] 2 => give reason for rebuild of target' 1182 @echo ' make O=dir [targets] Locate all output files in "dir", including .config' 1183 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' 1184 @echo ' make C=2 [targets] Force check of all c source with $$CHECK' 1185 @echo '' 1186 @echo 'Execute "make" or "make all" to build all targets marked with [*] ' 1187 @echo 'For further info see the ./README file' 1188 1189 1190# Documentation targets 1191# --------------------------------------------------------------------------- 1192%docs: scripts_basic FORCE 1193 $(Q)$(MAKE) $(build)=Documentation/DocBook $@ 1194 1195else # KBUILD_EXTMOD 1196 1197### 1198# External module support. 1199# When building external modules the kernel used as basis is considered 1200# read-only, and no consistency checks are made and the make 1201# system is not used on the basis kernel. If updates are required 1202# in the basis kernel ordinary make commands (without M=...) must 1203# be used. 1204# 1205# The following are the only valid targets when building external 1206# modules. 1207# make M=dir clean Delete all automatically generated files 1208# make M=dir modules Make all modules in specified dir 1209# make M=dir Same as 'make M=dir modules' 1210# make M=dir modules_install 1211# Install the modules built in the module directory 1212# Assumes install directory is already created 1213 1214# We are always building modules 1215KBUILD_MODULES := 1 1216PHONY += crmodverdir 1217crmodverdir: 1218 $(Q)mkdir -p $(MODVERDIR) 1219 $(Q)rm -f $(MODVERDIR)/* 1220 1221PHONY += $(objtree)/Module.symvers 1222$(objtree)/Module.symvers: 1223 @test -e $(objtree)/Module.symvers || ( \ 1224 echo; \ 1225 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ 1226 echo " is missing; modules will have no dependencies and modversions."; \ 1227 echo ) 1228 1229module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) 1230PHONY += $(module-dirs) modules 1231$(module-dirs): crmodverdir $(objtree)/Module.symvers 1232 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) 1233 1234modules: $(module-dirs) 1235 @echo ' Building modules, stage 2.'; 1236 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1237 1238PHONY += modules_install 1239modules_install: _emodinst_ _emodinst_post 1240 1241install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) 1242PHONY += _emodinst_ 1243_emodinst_: 1244 $(Q)mkdir -p $(MODLIB)/$(install-dir) 1245 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst 1246 1247# Run depmod only is we have System.map and depmod is executable 1248quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) 1249 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \ 1250 $(DEPMOD) -ae -F System.map \ 1251 $(if $(strip $(INSTALL_MOD_PATH)), \ 1252 -b $(INSTALL_MOD_PATH) -r) \ 1253 $(KERNELRELEASE); \ 1254 fi 1255 1256PHONY += _emodinst_post 1257_emodinst_post: _emodinst_ 1258 $(call cmd,depmod) 1259 1260clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) 1261 1262PHONY += $(clean-dirs) clean 1263$(clean-dirs): 1264 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) 1265 1266clean: rm-dirs := $(MODVERDIR) 1267clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers 1268clean: $(clean-dirs) 1269 $(call cmd,rmdirs) 1270 $(call cmd,rmfiles) 1271 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ 1272 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ 1273 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ 1274 -type f -print | xargs rm -f 1275 1276help: 1277 @echo ' Building external modules.' 1278 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' 1279 @echo '' 1280 @echo ' modules - default target, build the module(s)' 1281 @echo ' modules_install - install the module' 1282 @echo ' clean - remove generated files in module directory only' 1283 @echo '' 1284 1285# Dummies... 1286PHONY += prepare scripts 1287prepare: ; 1288scripts: ; 1289endif # KBUILD_EXTMOD 1290 1291# Generate tags for editors 1292# --------------------------------------------------------------------------- 1293 1294#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set 1295#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. 1296#Adding $(srctree) adds about 20M on i386 to the size of the output file! 1297 1298ifeq ($(src),$(obj)) 1299__srctree = 1300else 1301__srctree = $(srctree)/ 1302endif 1303 1304ifeq ($(ALLSOURCE_ARCHS),) 1305ifeq ($(ARCH),um) 1306ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) 1307else 1308ALLINCLUDE_ARCHS := $(SRCARCH) 1309endif 1310else 1311#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour. 1312ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) 1313endif 1314 1315# Take care of arch/x86 1316ifeq ($(ARCH), $(SRCARCH)) 1317ALLSOURCE_ARCHS := $(ARCH) 1318else 1319ALLSOURCE_ARCHS := $(ARCH) $(SRCARCH) 1320endif 1321 1322define find-sources 1323 ( for ARCH in $(ALLSOURCE_ARCHS) ; do \ 1324 find $(__srctree)arch/$${SRCARCH} $(RCS_FIND_IGNORE) \ 1325 -name $1 -print; \ 1326 done ; \ 1327 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ 1328 -name $1 -print; \ 1329 find $(__srctree)include $(RCS_FIND_IGNORE) \ 1330 \( -name config -o -name 'asm-*' \) -prune \ 1331 -o -name $1 -print; \ 1332 for ARCH in $(ALLINCLUDE_ARCHS) ; do \ 1333 find $(__srctree)include/asm-$${SRCARCH} $(RCS_FIND_IGNORE) \ 1334 -name $1 -print; \ 1335 done ; \ 1336 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ 1337 -name $1 -print; \ 1338 find $(__srctree) $(RCS_FIND_IGNORE) \ 1339 \( -name include -o -name arch \) -prune -o \ 1340 -name $1 -print; \ 1341 ) 1342endef 1343 1344define all-sources 1345 $(call find-sources,'*.[chS]') 1346endef 1347define all-kconfigs 1348 $(call find-sources,'Kconfig*') 1349endef 1350define all-defconfigs 1351 $(call find-sources,'defconfig') 1352endef 1353 1354define xtags 1355 if $1 --version 2>&1 | grep -iq exuberant; then \ 1356 $(all-sources) | xargs $1 -a \ 1357 -I __initdata,__exitdata,__acquires,__releases \ 1358 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ 1359 --extra=+f --c-kinds=+px \ 1360 --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \ 1361 $(all-kconfigs) | xargs $1 -a \ 1362 --langdef=kconfig \ 1363 --language-force=kconfig \ 1364 --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \ 1365 $(all-defconfigs) | xargs -r $1 -a \ 1366 --langdef=dotconfig \ 1367 --language-force=dotconfig \ 1368 --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \ 1369 elif $1 --version 2>&1 | grep -iq emacs; then \ 1370 $(all-sources) | xargs $1 -a; \ 1371 $(all-kconfigs) | xargs $1 -a \ 1372 --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \ 1373 $(all-defconfigs) | xargs -r $1 -a \ 1374 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \ 1375 else \ 1376 $(all-sources) | xargs $1 -a; \ 1377 fi 1378endef 1379 1380quiet_cmd_cscope-file = FILELST cscope.files 1381 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files 1382 1383quiet_cmd_cscope = MAKE cscope.out 1384 cmd_cscope = cscope -b 1385 1386cscope: FORCE 1387 $(call cmd,cscope-file) 1388 $(call cmd,cscope) 1389 1390quiet_cmd_TAGS = MAKE $@ 1391define cmd_TAGS 1392 rm -f $@; \ 1393 $(call xtags,etags) 1394endef 1395 1396TAGS: FORCE 1397 $(call cmd,TAGS) 1398 1399quiet_cmd_tags = MAKE $@ 1400define cmd_tags 1401 rm -f $@; \ 1402 $(call xtags,ctags) 1403endef 1404 1405tags: FORCE 1406 $(call cmd,tags) 1407 1408 1409# Scripts to check various things for consistency 1410# --------------------------------------------------------------------------- 1411 1412includecheck: 1413 find * $(RCS_FIND_IGNORE) \ 1414 -name '*.[hcS]' -type f -print | sort \ 1415 | xargs $(PERL) -w scripts/checkincludes.pl 1416 1417versioncheck: 1418 find * $(RCS_FIND_IGNORE) \ 1419 -name '*.[hcS]' -type f -print | sort \ 1420 | xargs $(PERL) -w scripts/checkversion.pl 1421 1422namespacecheck: 1423 $(PERL) $(srctree)/scripts/namespace.pl 1424 1425export_report: 1426 $(PERL) $(srctree)/scripts/export_report.pl 1427 1428endif #ifeq ($(config-targets),1) 1429endif #ifeq ($(mixed-targets),1) 1430 1431PHONY += checkstack kernelrelease kernelversion 1432 1433# UML needs a little special treatment here. It wants to use the host 1434# toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone 1435# else wants $(ARCH), including people doing cross-builds, which means 1436# that $(SUBARCH) doesn't work here. 1437ifeq ($(ARCH), um) 1438CHECKSTACK_ARCH := $(SUBARCH) 1439else 1440CHECKSTACK_ARCH := $(ARCH) 1441endif 1442checkstack: 1443 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ 1444 $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) 1445 1446kernelrelease: 1447 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \ 1448 $(error kernelrelease not valid - run 'make prepare' to update it)) 1449kernelversion: 1450 @echo $(KERNELVERSION) 1451 1452# Single targets 1453# --------------------------------------------------------------------------- 1454# Single targets are compatible with: 1455# - build whith mixed source and output 1456# - build with separate output dir 'make O=...' 1457# - external modules 1458# 1459# target-dir => where to store outputfile 1460# build-dir => directory in kernel source tree to use 1461 1462ifeq ($(KBUILD_EXTMOD),) 1463 build-dir = $(patsubst %/,%,$(dir $@)) 1464 target-dir = $(dir $@) 1465else 1466 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) 1467 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) 1468 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) 1469endif 1470 1471%.s: %.c prepare scripts FORCE 1472 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1473%.i: %.c prepare scripts FORCE 1474 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1475%.o: %.c prepare scripts FORCE 1476 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1477%.lst: %.c prepare scripts FORCE 1478 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1479%.s: %.S prepare scripts FORCE 1480 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1481%.o: %.S prepare scripts FORCE 1482 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1483%.symtypes: %.c prepare scripts FORCE 1484 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) 1485 1486# Modules 1487/ %/: prepare scripts FORCE 1488 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1489 $(build)=$(build-dir) 1490%.ko: prepare scripts FORCE 1491 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ 1492 $(build)=$(build-dir) $(@:.ko=.o) 1493 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost 1494 1495# FIXME Should go into a make.lib or something 1496# =========================================================================== 1497 1498quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) 1499 cmd_rmdirs = rm -rf $(rm-dirs) 1500 1501quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) 1502 cmd_rmfiles = rm -f $(rm-files) 1503 1504 1505a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ 1506 $(NOSTDINC_FLAGS) $(CPPFLAGS) \ 1507 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o) 1508 1509quiet_cmd_as_o_S = AS $@ 1510cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< 1511 1512# read all saved command lines 1513 1514targets := $(wildcard $(sort $(targets))) 1515cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) 1516 1517ifneq ($(cmd_files),) 1518 $(cmd_files): ; # Do not try to update included dependency files 1519 include $(cmd_files) 1520endif 1521 1522# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir 1523# Usage: 1524# $(Q)$(MAKE) $(clean)=dir 1525clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj 1526 1527endif # skip-makefile 1528 1529PHONY += FORCE 1530FORCE: 1531 1532# Cancel implicit rules on top Makefile, `-rR' will apply to sub-makes. 1533Makefile: ; 1534 1535# Declare the contents of the .PHONY variable as phony. We keep that 1536# information in a variable se we can use it in if_changed and friends. 1537.PHONY: $(PHONY) 1538