linux/Makefile
<<
>>
Prefs
   1VERSION = 2
   2PATCHLEVEL = 6
   3SUBLEVEL = 27
   4EXTRAVERSION = .62
   5NAME = Trembling Tortoise
   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 avoids hard-to-debug behaviour);
  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 := $(O)
 104  endif
 105endif
 106
 107# That's our default target when none is given on the command line
 108PHONY := _all
 109_all:
 110
 111# Cancel implicit rules on top Makefile
 112$(CURDIR)/Makefile Makefile: ;
 113
 114ifneq ($(KBUILD_OUTPUT),)
 115# Invoke a second make in the output directory, passing relevant variables
 116# check that the output directory actually exists
 117saved-output := $(KBUILD_OUTPUT)
 118KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
 119$(if $(KBUILD_OUTPUT),, \
 120     $(error output directory "$(saved-output)" does not exist))
 121
 122PHONY += $(MAKECMDGOALS) sub-make
 123
 124$(filter-out _all sub-make $(CURDIR)/Makefile, $(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                                  -e s/sh.*/sh/ )
 173
 174# Cross compiling and selecting different set of gcc/bin-utils
 175# ---------------------------------------------------------------------------
 176#
 177# When performing cross compilation for other architectures ARCH shall be set
 178# to the target architecture. (See arch/* for the possibilities).
 179# ARCH can be set during invocation of make:
 180# make ARCH=ia64
 181# Another way is to have ARCH set in the environment.
 182# The default ARCH is the host where make is executed.
 183
 184# CROSS_COMPILE specify the prefix used for all executables used
 185# during compilation. Only gcc and related bin-utils executables
 186# are prefixed with $(CROSS_COMPILE).
 187# CROSS_COMPILE can be set on the command line
 188# make CROSS_COMPILE=ia64-linux-
 189# Alternatively CROSS_COMPILE can be set in the environment.
 190# Default value for CROSS_COMPILE is not to prefix executables
 191# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 192export KBUILD_BUILDHOST := $(SUBARCH)
 193ARCH            ?= $(SUBARCH)
 194CROSS_COMPILE   ?=
 195
 196# Architecture as present in compile.h
 197UTS_MACHINE     := $(ARCH)
 198SRCARCH         := $(ARCH)
 199
 200# Additional ARCH settings for x86
 201ifeq ($(ARCH),i386)
 202        SRCARCH := x86
 203endif
 204ifeq ($(ARCH),x86_64)
 205        SRCARCH := x86
 206endif
 207
 208# Where to locate arch specific headers
 209ifeq ($(ARCH),sparc64)
 210       hdr-arch  := sparc
 211else
 212       hdr-arch  := $(SRCARCH)
 213endif
 214
 215KCONFIG_CONFIG  ?= .config
 216
 217# SHELL used by kbuild
 218CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
 219          else if [ -x /bin/bash ]; then echo /bin/bash; \
 220          else echo sh; fi ; fi)
 221
 222HOSTCC       = gcc
 223HOSTCXX      = g++
 224HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
 225HOSTCXXFLAGS = -O2
 226
 227# Decide whether to build built-in, modular, or both.
 228# Normally, just do built-in.
 229
 230KBUILD_MODULES :=
 231KBUILD_BUILTIN := 1
 232
 233#       If we have only "make modules", don't compile built-in objects.
 234#       When we're building modules with modversions, we need to consider
 235#       the built-in objects during the descend as well, in order to
 236#       make sure the checksums are up to date before we record them.
 237
 238ifeq ($(MAKECMDGOALS),modules)
 239  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
 240endif
 241
 242#       If we have "make <whatever> modules", compile modules
 243#       in addition to whatever we do anyway.
 244#       Just "make" or "make all" shall build modules as well
 245
 246ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
 247  KBUILD_MODULES := 1
 248endif
 249
 250ifeq ($(MAKECMDGOALS),)
 251  KBUILD_MODULES := 1
 252endif
 253
 254export KBUILD_MODULES KBUILD_BUILTIN
 255export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 256
 257# Beautify output
 258# ---------------------------------------------------------------------------
 259#
 260# Normally, we echo the whole command before executing it. By making
 261# that echo $($(quiet)$(cmd)), we now have the possibility to set
 262# $(quiet) to choose other forms of output instead, e.g.
 263#
 264#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
 265#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
 266#
 267# If $(quiet) is empty, the whole command will be printed.
 268# If it is set to "quiet_", only the short version will be printed. 
 269# If it is set to "silent_", nothing will be printed at all, since
 270# the variable $(silent_cmd_cc_o_c) doesn't exist.
 271#
 272# A simple variant is to prefix commands with $(Q) - that's useful
 273# for commands that shall be hidden in non-verbose mode.
 274#
 275#       $(Q)ln $@ :<
 276#
 277# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
 278# If KBUILD_VERBOSE equals 1 then the above command is displayed.
 279
 280ifeq ($(KBUILD_VERBOSE),1)
 281  quiet =
 282  Q =
 283else
 284  quiet=quiet_
 285  Q = @
 286endif
 287
 288# If the user is running make -s (silent mode), suppress echoing of
 289# commands
 290
 291ifneq ($(findstring s,$(MAKEFLAGS)),)
 292  quiet=silent_
 293endif
 294
 295export quiet Q KBUILD_VERBOSE
 296
 297
 298# Look for make include files relative to root of kernel src
 299MAKEFLAGS += --include-dir=$(srctree)
 300
 301# We need some generic definitions (do not try to remake the file).
 302$(srctree)/scripts/Kbuild.include: ;
 303include $(srctree)/scripts/Kbuild.include
 304
 305# Make variables (CC, etc...)
 306
 307AS              = $(CROSS_COMPILE)as
 308LD              = $(CROSS_COMPILE)ld
 309CC              = $(CROSS_COMPILE)gcc
 310CPP             = $(CC) -E
 311AR              = $(CROSS_COMPILE)ar
 312NM              = $(CROSS_COMPILE)nm
 313STRIP           = $(CROSS_COMPILE)strip
 314OBJCOPY         = $(CROSS_COMPILE)objcopy
 315OBJDUMP         = $(CROSS_COMPILE)objdump
 316AWK             = awk
 317GENKSYMS        = scripts/genksyms/genksyms
 318DEPMOD          = /sbin/depmod
 319KALLSYMS        = scripts/kallsyms
 320PERL            = perl
 321CHECK           = sparse
 322
 323CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
 324MODFLAGS        = -DMODULE
 325CFLAGS_MODULE   = $(MODFLAGS)
 326AFLAGS_MODULE   = $(MODFLAGS)
 327LDFLAGS_MODULE  =
 328CFLAGS_KERNEL   =
 329AFLAGS_KERNEL   =
 330
 331
 332# Use LINUXINCLUDE when you must reference the include/ directory.
 333# Needed to be compatible with the O= option
 334LINUXINCLUDE    := -Iinclude \
 335                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
 336                   -I$(srctree)/arch/$(hdr-arch)/include               \
 337                   -include include/linux/autoconf.h
 338
 339KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 340
 341KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
 342                   -fno-strict-aliasing -fno-common \
 343                   -Werror-implicit-function-declaration \
 344                   -fno-delete-null-pointer-checks
 345KBUILD_AFLAGS   := -D__ASSEMBLY__
 346
 347# Read KERNELRELEASE from include/config/kernel.release (if it exists)
 348KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
 349KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 350
 351export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
 352export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
 353export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
 354export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 355
 356export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
 357export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
 358export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 359
 360# When compiling out-of-tree modules, put MODVERDIR in the module
 361# tree rather than in the kernel tree. The kernel tree might
 362# even be read-only.
 363export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 364
 365# Files to ignore in find ... statements
 366
 367RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
 368export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 369
 370# ===========================================================================
 371# Rules shared between *config targets and build targets
 372
 373# Basic helpers built in scripts/
 374PHONY += scripts_basic
 375scripts_basic:
 376        $(Q)$(MAKE) $(build)=scripts/basic
 377
 378# To avoid any implicit rule to kick in, define an empty command.
 379scripts/basic/%: scripts_basic ;
 380
 381PHONY += outputmakefile
 382# outputmakefile generates a Makefile in the output directory, if using a
 383# separate output directory. This allows convenient use of make in the
 384# output directory.
 385outputmakefile:
 386ifneq ($(KBUILD_SRC),)
 387        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
 388            $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
 389endif
 390
 391# To make sure we do not include .config for any of the *config targets
 392# catch them early, and hand them over to scripts/kconfig/Makefile
 393# It is allowed to specify more targets when calling make, including
 394# mixing *config targets and build targets.
 395# For example 'make oldconfig all'.
 396# Detect when mixed targets is specified, and make a second invocation
 397# of make so .config is not included in this case either (for *config).
 398
 399no-dot-config-targets := clean mrproper distclean \
 400                         cscope TAGS tags help %docs check% \
 401                         include/linux/version.h headers_% \
 402                         kernelrelease kernelversion
 403
 404config-targets := 0
 405mixed-targets  := 0
 406dot-config     := 1
 407
 408ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
 409        ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
 410                dot-config := 0
 411        endif
 412endif
 413
 414ifeq ($(KBUILD_EXTMOD),)
 415        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
 416                config-targets := 1
 417                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
 418                        mixed-targets := 1
 419                endif
 420        endif
 421endif
 422
 423ifeq ($(mixed-targets),1)
 424# ===========================================================================
 425# We're called with mixed targets (*config and build targets).
 426# Handle them one by one.
 427
 428%:: FORCE
 429        $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 430
 431else
 432ifeq ($(config-targets),1)
 433# ===========================================================================
 434# *config targets only - make sure prerequisites are updated, and descend
 435# in scripts/kconfig to make the *config target
 436
 437# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 438# KBUILD_DEFCONFIG may point out an alternative default configuration
 439# used for 'make defconfig'
 440include $(srctree)/arch/$(SRCARCH)/Makefile
 441export KBUILD_DEFCONFIG
 442
 443config: scripts_basic outputmakefile FORCE
 444        $(Q)mkdir -p include/linux include/config
 445        $(Q)$(MAKE) $(build)=scripts/kconfig $@
 446
 447%config: scripts_basic outputmakefile FORCE
 448        $(Q)mkdir -p include/linux include/config
 449        $(Q)$(MAKE) $(build)=scripts/kconfig $@
 450
 451else
 452# ===========================================================================
 453# Build targets only - this includes vmlinux, arch specific targets, clean
 454# targets and others. In general all targets except *config targets.
 455
 456ifeq ($(KBUILD_EXTMOD),)
 457# Additional helpers built in scripts/
 458# Carefully list dependencies so we do not try to build scripts twice
 459# in parallel
 460PHONY += scripts
 461scripts: scripts_basic include/config/auto.conf
 462        $(Q)$(MAKE) $(build)=$(@)
 463
 464# Objects we will link into vmlinux / subdirs we need to visit
 465init-y          := init/
 466drivers-y       := drivers/ sound/ firmware/
 467net-y           := net/
 468libs-y          := lib/
 469core-y          := usr/
 470endif # KBUILD_EXTMOD
 471
 472ifeq ($(dot-config),1)
 473# Read in config
 474-include include/config/auto.conf
 475
 476ifeq ($(KBUILD_EXTMOD),)
 477# Read in dependencies to all Kconfig* files, make sure to run
 478# oldconfig if changes are detected.
 479-include include/config/auto.conf.cmd
 480
 481# To avoid any implicit rule to kick in, define an empty command
 482$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 483
 484# If .config is newer than include/config/auto.conf, someone tinkered
 485# with it and forgot to run make oldconfig.
 486# if auto.conf.cmd is missing then we are probably in a cleaned tree so
 487# we execute the config step to be sure to catch updated Kconfig files
 488include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
 489        $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
 490else
 491# external modules needs include/linux/autoconf.h and include/config/auto.conf
 492# but do not care if they are up-to-date. Use auto.conf to trigger the test
 493PHONY += include/config/auto.conf
 494
 495include/config/auto.conf:
 496        $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
 497        echo;                                                           \
 498        echo "  ERROR: Kernel configuration is invalid.";               \
 499        echo "         include/linux/autoconf.h or $@ are missing.";    \
 500        echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";  \
 501        echo;                                                           \
 502        /bin/false)
 503
 504endif # KBUILD_EXTMOD
 505
 506else
 507# Dummy target needed, because used as prerequisite
 508include/config/auto.conf: ;
 509endif # $(dot-config)
 510
 511# The all: target is the default when no target is given on the
 512# command line.
 513# This allow a user to issue only 'make' to build a kernel including modules
 514# Defaults vmlinux but it is usually overridden in the arch makefile
 515all: vmlinux
 516
 517ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
 518KBUILD_CFLAGS   += -Os
 519else
 520KBUILD_CFLAGS   += -O2
 521endif
 522
 523include $(srctree)/arch/$(SRCARCH)/Makefile
 524
 525ifneq (CONFIG_FRAME_WARN,0)
 526KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
 527endif
 528
 529# Force gcc to behave correct even for buggy distributions
 530# Arch Makefiles may override this setting
 531KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
 532
 533# This warning generated too much noise in a regular build.
 534KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
 535
 536ifdef CONFIG_FRAME_POINTER
 537KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
 538else
 539KBUILD_CFLAGS   += -fomit-frame-pointer
 540endif
 541
 542ifdef CONFIG_DEBUG_INFO
 543KBUILD_CFLAGS   += -g
 544KBUILD_AFLAGS   += -gdwarf-2
 545endif
 546
 547ifdef CONFIG_FTRACE
 548KBUILD_CFLAGS   += -pg
 549endif
 550
 551# We trigger additional mismatches with less inlining
 552ifdef CONFIG_DEBUG_SECTION_MISMATCH
 553KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once)
 554endif
 555
 556# arch Makefile may override CC so keep this after arch Makefile is included
 557NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 558CHECKFLAGS     += $(NOSTDINC_FLAGS)
 559
 560# warn about C99 declaration after statement
 561KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 562
 563# disable pointer signed / unsigned warnings in gcc 4.0
 564KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign)
 565
 566# disable invalid "can't wrap" optimzations for signed / pointers
 567KBUILD_CFLAGS   += $(call cc-option,-fno-strict-overflow)
 568
 569# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
 570# But warn user when we do so
 571warn-assign = \
 572$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 573
 574ifneq ($(KCPPFLAGS),)
 575        $(call warn-assign,CPPFLAGS)
 576        KBUILD_CPPFLAGS += $(KCPPFLAGS)
 577endif
 578ifneq ($(KAFLAGS),)
 579        $(call warn-assign,AFLAGS)
 580        KBUILD_AFLAGS += $(KAFLAGS)
 581endif
 582ifneq ($(KCFLAGS),)
 583        $(call warn-assign,CFLAGS)
 584        KBUILD_CFLAGS += $(KCFLAGS)
 585endif
 586
 587# Use --build-id when available.
 588LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
 589                              $(call ld-option, -Wl$(comma)--build-id,))
 590LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
 591LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 592
 593# Default kernel image to build when no specific target is given.
 594# KBUILD_IMAGE may be overruled on the command line or
 595# set in the environment
 596# Also any assignments in arch/$(ARCH)/Makefile take precedence over
 597# this default value
 598export KBUILD_IMAGE ?= vmlinux
 599
 600#
 601# INSTALL_PATH specifies where to place the updated kernel and system map
 602# images. Default is /boot, but you can set it to other values
 603export  INSTALL_PATH ?= /boot
 604
 605#
 606# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
 607# relocations required by build roots.  This is not defined in the
 608# makefile but the argument can be passed to make if needed.
 609#
 610
 611MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
 612export MODLIB
 613
 614#
 615#  INSTALL_MOD_STRIP, if defined, will cause modules to be
 616#  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
 617#  the default option --strip-debug will be used.  Otherwise,
 618#  INSTALL_MOD_STRIP will used as the options to the strip command.
 619
 620ifdef INSTALL_MOD_STRIP
 621ifeq ($(INSTALL_MOD_STRIP),1)
 622mod_strip_cmd = $(STRIP) --strip-debug
 623else
 624mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
 625endif # INSTALL_MOD_STRIP=1
 626else
 627mod_strip_cmd = true
 628endif # INSTALL_MOD_STRIP
 629export mod_strip_cmd
 630
 631
 632ifeq ($(KBUILD_EXTMOD),)
 633core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 634
 635vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
 636                     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
 637                     $(net-y) $(net-m) $(libs-y) $(libs-m)))
 638
 639vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
 640                     $(init-n) $(init-) \
 641                     $(core-n) $(core-) $(drivers-n) $(drivers-) \
 642                     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 643
 644init-y          := $(patsubst %/, %/built-in.o, $(init-y))
 645core-y          := $(patsubst %/, %/built-in.o, $(core-y))
 646drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
 647net-y           := $(patsubst %/, %/built-in.o, $(net-y))
 648libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
 649libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
 650libs-y          := $(libs-y1) $(libs-y2)
 651
 652# Build vmlinux
 653# ---------------------------------------------------------------------------
 654# vmlinux is built from the objects selected by $(vmlinux-init) and
 655# $(vmlinux-main). Most are built-in.o files from top-level directories
 656# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
 657# Ordering when linking is important, and $(vmlinux-init) must be first.
 658#
 659# vmlinux
 660#   ^
 661#   |
 662#   +-< $(vmlinux-init)
 663#   |   +--< init/version.o + more
 664#   |
 665#   +--< $(vmlinux-main)
 666#   |    +--< driver/built-in.o mm/built-in.o + more
 667#   |
 668#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
 669#
 670# vmlinux version (uname -v) cannot be updated during normal
 671# descending-into-subdirs phase since we do not yet know if we need to
 672# update vmlinux.
 673# Therefore this step is delayed until just before final link of vmlinux -
 674# except in the kallsyms case where it is done just before adding the
 675# symbols to the kernel.
 676#
 677# System.map is generated to document addresses of all kernel symbols
 678
 679vmlinux-init := $(head-y) $(init-y)
 680vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
 681vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
 682vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
 683export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 684
 685# Rule to link vmlinux - also used during CONFIG_KALLSYMS
 686# May be overridden by arch/$(ARCH)/Makefile
 687quiet_cmd_vmlinux__ ?= LD      $@
 688      cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
 689      -T $(vmlinux-lds) $(vmlinux-init)                          \
 690      --start-group $(vmlinux-main) --end-group                  \
 691      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 692
 693# Generate new vmlinux version
 694quiet_cmd_vmlinux_version = GEN     .version
 695      cmd_vmlinux_version = set -e;                     \
 696        if [ ! -r .version ]; then                      \
 697          rm -f .version;                               \
 698          echo 1 >.version;                             \
 699        else                                            \
 700          mv .version .old_version;                     \
 701          expr 0$$(cat .old_version) + 1 >.version;     \
 702        fi;                                             \
 703        $(MAKE) $(build)=init
 704
 705# Generate System.map
 706quiet_cmd_sysmap = SYSMAP
 707      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 708
 709# Link of vmlinux
 710# If CONFIG_KALLSYMS is set .version is already updated
 711# Generate System.map and verify that the content is consistent
 712# Use + in front of the vmlinux_version rule to silent warning with make -j2
 713# First command is ':' to allow us to use + in front of the rule
 714define rule_vmlinux__
 715        :
 716        $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 717
 718        $(call cmd,vmlinux__)
 719        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 720
 721        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 722          echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
 723        $(cmd_sysmap) $@ System.map;                                         \
 724        if [ $$? -ne 0 ]; then                                               \
 725                rm -f $@;                                                    \
 726                /bin/false;                                                  \
 727        fi;
 728        $(verify_kallsyms)
 729endef
 730
 731
 732ifdef CONFIG_KALLSYMS
 733# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
 734# It's a three stage process:
 735# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
 736#   empty
 737#   Running kallsyms on that gives us .tmp_kallsyms1.o with
 738#   the right size - vmlinux version (uname -v) is updated during this step
 739# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
 740#   but due to the added section, some addresses have shifted.
 741#   From here, we generate a correct .tmp_kallsyms2.o
 742# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
 743# o Verify that the System.map from vmlinux matches the map from
 744#   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
 745# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
 746#   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
 747#   temporary bypass to allow the kernel to be built while the
 748#   maintainers work out what went wrong with kallsyms.
 749
 750ifdef CONFIG_KALLSYMS_EXTRA_PASS
 751last_kallsyms := 3
 752else
 753last_kallsyms := 2
 754endif
 755
 756kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 757
 758define verify_kallsyms
 759        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
 760          echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
 761          $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
 762        $(Q)cmp -s System.map .tmp_System.map ||                             \
 763                (echo Inconsistent kallsyms data;                            \
 764                 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
 765                 rm .tmp_kallsyms* ; /bin/false )
 766endef
 767
 768# Update vmlinux version before link
 769# Use + in front of this rule to silent warning about make -j1
 770# First command is ':' to allow us to use + in front of this rule
 771cmd_ksym_ld = $(cmd_vmlinux__)
 772define rule_ksym_ld
 773        : 
 774        +$(call cmd,vmlinux_version)
 775        $(call cmd,vmlinux__)
 776        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 777endef
 778
 779# Generate .S file with all kernel symbols
 780quiet_cmd_kallsyms = KSYM    $@
 781      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
 782                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 783
 784.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
 785        $(call if_changed_dep,as_o_S)
 786
 787.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
 788        $(call cmd,kallsyms)
 789
 790# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
 791.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
 792        $(call if_changed_rule,ksym_ld)
 793
 794.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
 795        $(call if_changed,vmlinux__)
 796
 797.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
 798        $(call if_changed,vmlinux__)
 799
 800# Needs to visit scripts/ before $(KALLSYMS) can be used.
 801$(KALLSYMS): scripts ;
 802
 803# Generate some data for debugging strange kallsyms problems
 804debug_kallsyms: .tmp_map$(last_kallsyms)
 805
 806.tmp_map%: .tmp_vmlinux% FORCE
 807        ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 808
 809.tmp_map3: .tmp_map2
 810
 811.tmp_map2: .tmp_map1
 812
 813endif # ifdef CONFIG_KALLSYMS
 814
 815# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
 816# relevant sections renamed as per the linker script.
 817quiet_cmd_vmlinux-modpost = LD      $@
 818      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
 819         $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
 820         $(filter-out $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
 821define rule_vmlinux-modpost
 822        :
 823        +$(call cmd,vmlinux-modpost)
 824        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
 825        $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
 826endef
 827
 828# vmlinux image - including updated kernel symbols
 829vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE
 830ifdef CONFIG_HEADERS_CHECK
 831        $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
 832endif
 833ifdef CONFIG_SAMPLES
 834        $(Q)$(MAKE) $(build)=samples
 835endif
 836ifdef CONFIG_BUILD_DOCSRC
 837        $(Q)$(MAKE) $(build)=Documentation
 838endif
 839        $(call vmlinux-modpost)
 840        $(call if_changed_rule,vmlinux__)
 841        $(Q)rm -f .old_version
 842
 843# build vmlinux.o first to catch section mismatch errors early
 844ifdef CONFIG_KALLSYMS
 845.tmp_vmlinux1: vmlinux.o
 846endif
 847
 848modpost-init := $(filter-out init/built-in.o, $(vmlinux-init))
 849vmlinux.o: $(modpost-init) $(vmlinux-main) FORCE
 850        $(call if_changed_rule,vmlinux-modpost)
 851
 852# The actual objects are generated when descending, 
 853# make sure no implicit rule kicks in
 854$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 855
 856# Handle descending into subdirectories listed in $(vmlinux-dirs)
 857# Preset locale variables to speed up the build process. Limit locale
 858# tweaks to this spot to avoid wrong language settings when running
 859# make menuconfig etc.
 860# Error messages still appears in the original language
 861
 862PHONY += $(vmlinux-dirs)
 863$(vmlinux-dirs): prepare scripts
 864        $(Q)$(MAKE) $(build)=$@
 865
 866# Build the kernel release string
 867#
 868# The KERNELRELEASE value built here is stored in the file
 869# include/config/kernel.release, and is used when executing several
 870# make targets, such as "make install" or "make modules_install."
 871#
 872# The eventual kernel release string consists of the following fields,
 873# shown in a hierarchical format to show how smaller parts are concatenated
 874# to form the larger and final value, with values coming from places like
 875# the Makefile, kernel config options, make command line options and/or
 876# SCM tag information.
 877#
 878#       $(KERNELVERSION)
 879#         $(VERSION)                    eg, 2
 880#         $(PATCHLEVEL)                 eg, 6
 881#         $(SUBLEVEL)                   eg, 18
 882#         $(EXTRAVERSION)               eg, -rc6
 883#       $(localver-full)
 884#         $(localver)
 885#           localversion*               (files without backups, containing '~')
 886#           $(CONFIG_LOCALVERSION)      (from kernel config setting)
 887#         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
 888#           ./scripts/setlocalversion   (SCM tag, if one exists)
 889#           $(LOCALVERSION)             (from make command line if provided)
 890#
 891#  Note how the final $(localver-auto) string is included *only* if the
 892# kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
 893# moment, only git is supported but other SCMs can edit the script
 894# scripts/setlocalversion and add the appropriate checks as needed.
 895
 896pattern = ".*/localversion[^~]*"
 897string  = $(shell cat /dev/null \
 898           `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 899
 900localver = $(subst $(space),, $(string) \
 901                              $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 902
 903# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
 904# and if the SCM is know a tag from the SCM is appended.
 905# The appended tag is determined by the SCM used.
 906#
 907# Currently, only git is supported.
 908# Other SCMs can edit scripts/setlocalversion and add the appropriate
 909# checks as needed.
 910ifdef CONFIG_LOCALVERSION_AUTO
 911        _localver-auto = $(shell $(CONFIG_SHELL) \
 912                          $(srctree)/scripts/setlocalversion $(srctree))
 913        localver-auto  = $(LOCALVERSION)$(_localver-auto)
 914endif
 915
 916localver-full = $(localver)$(localver-auto)
 917
 918# Store (new) KERNELRELASE string in include/config/kernel.release
 919kernelrelease = $(KERNELVERSION)$(localver-full)
 920include/config/kernel.release: include/config/auto.conf FORCE
 921        $(Q)rm -f $@
 922        $(Q)echo $(kernelrelease) > $@
 923
 924
 925# Things we need to do before we recursively start building the kernel
 926# or the modules are listed in "prepare".
 927# A multi level approach is used. prepareN is processed before prepareN-1.
 928# archprepare is used in arch Makefiles and when processed asm symlink,
 929# version.h and scripts_basic is processed / created.
 930
 931# Listed in dependency order
 932PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 933
 934# prepare3 is used to check if we are building in a separate output directory,
 935# and if so do:
 936# 1) Check that make has not been executed in the kernel src $(srctree)
 937# 2) Create the include2 directory, used for the second asm symlink
 938prepare3: include/config/kernel.release
 939ifneq ($(KBUILD_SRC),)
 940        @echo '  Using $(srctree) as source for kernel'
 941        $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
 942                echo "  $(srctree) is not clean, please run 'make mrproper'";\
 943                echo "  in the '$(srctree)' directory.";\
 944                /bin/false; \
 945        fi;
 946        $(Q)if [ ! -d include2 ]; then                                  \
 947            mkdir -p include2;                                          \
 948            ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
 949        fi
 950endif
 951
 952# prepare2 creates a makefile if using a separate output directory
 953prepare2: prepare3 outputmakefile
 954
 955prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
 956                   include/asm include/config/auto.conf
 957        $(cmd_crmodverdir)
 958
 959archprepare: prepare1 scripts_basic
 960
 961prepare0: archprepare FORCE
 962        $(Q)$(MAKE) $(build)=.
 963        $(Q)$(MAKE) $(build)=. missing-syscalls
 964
 965# All the preparing..
 966prepare: prepare0
 967
 968# Leave this as default for preprocessing vmlinux.lds.S, which is now
 969# done in arch/$(ARCH)/kernel/Makefile
 970
 971export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 972
 973# The asm symlink changes when $(ARCH) changes.
 974# Detect this and ask user to run make mrproper
 975define check-symlink
 976        set -e;                                                            \
 977        if [ -L include/asm ]; then                                        \
 978                asmlink=`readlink include/asm | cut -d '-' -f 2`;          \
 979                if [ "$$asmlink" != "$(SRCARCH)" ]; then                   \
 980                        echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
 981                        echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
 982                        exit 1;                                            \
 983                fi;                                                        \
 984        fi
 985endef
 986
 987# We create the target directory of the symlink if it does
 988# not exist so the test in chack-symlink works and we have a
 989# directory for generated filesas used by some architectures.
 990define create-symlink
 991        if [ ! -L include/asm ]; then                                      \
 992                        echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';     \
 993                        if [ ! -d include/asm-$(SRCARCH) ]; then           \
 994                                mkdir -p include/asm-$(SRCARCH);           \
 995                        fi;                                                \
 996                        ln -fsn asm-$(SRCARCH) $@;                         \
 997        fi
 998endef
 999
1000include/asm: FORCE
1001        $(Q)$(check-symlink)
1002        $(Q)$(create-symlink)
1003
1004# Generate some files
1005# ---------------------------------------------------------------------------
1006
1007# KERNELRELEASE can change from a few different places, meaning version.h
1008# needs to be updated, so this check is forced on all builds
1009
1010uts_len := 64
1011define filechk_utsrelease.h
1012        if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
1013          echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
1014          exit 1;                                                         \
1015        fi;                                                               \
1016        (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
1017endef
1018
1019define filechk_version.h
1020        (echo \#define LINUX_VERSION_CODE $(shell                             \
1021        expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
1022        echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
1023endef
1024
1025include/linux/version.h: $(srctree)/Makefile FORCE
1026        $(call filechk,version.h)
1027
1028include/linux/utsrelease.h: include/config/kernel.release FORCE
1029        $(call filechk,utsrelease.h)
1030
1031# ---------------------------------------------------------------------------
1032
1033PHONY += depend dep
1034depend dep:
1035        @echo '*** Warning: make $@ is unnecessary now.'
1036
1037# ---------------------------------------------------------------------------
1038# Firmware install
1039INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
1040export INSTALL_FW_PATH
1041
1042PHONY += firmware_install
1043firmware_install: FORCE
1044        @mkdir -p $(objtree)/firmware
1045        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_install
1046
1047# ---------------------------------------------------------------------------
1048# Kernel headers
1049
1050#Default location for installed headers
1051export INSTALL_HDR_PATH = $(objtree)/usr
1052
1053hdr-inst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
1054# Find out where the Kbuild file is located to support
1055# arch/$(ARCH)/include/asm
1056hdr-dir = $(strip                                                         \
1057          $(if $(wildcard $(srctree)/arch/$(hdr-arch)/include/asm/Kbuild), \
1058               arch/$(hdr-arch)/include/asm, include/asm-$(hdr-arch)))
1059
1060# If we do an all arch process set dst to asm-$(hdr-arch)
1061hdr-dst = $(if $(KBUILD_HEADERS), dst=include/asm-$(hdr-arch), dst=include/asm)
1062
1063PHONY += __headers
1064__headers: include/linux/version.h scripts_basic FORCE
1065        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
1066
1067PHONY += headers_install_all
1068headers_install_all:
1069        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install
1070
1071PHONY += headers_install
1072headers_install: __headers
1073        $(if $(wildcard $(srctree)/$(hdr-dir)/Kbuild),, \
1074        $(error Headers not exportable for the $(SRCARCH) architecture))
1075        $(Q)$(MAKE) $(hdr-inst)=include
1076        $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst)
1077
1078PHONY += headers_check_all
1079headers_check_all: headers_install_all
1080        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check
1081
1082PHONY += headers_check
1083headers_check: headers_install
1084        $(Q)$(MAKE) $(hdr-inst)=include HDRCHECK=1
1085        $(Q)$(MAKE) $(hdr-inst)=$(hdr-dir) $(hdr-dst) HDRCHECK=1
1086
1087# ---------------------------------------------------------------------------
1088# Modules
1089
1090ifdef CONFIG_MODULES
1091
1092# By default, build modules as well
1093
1094all: modules
1095
1096#       Build modules
1097#
1098#       A module can be listed more than once in obj-m resulting in
1099#       duplicate lines in modules.order files.  Those are removed
1100#       using awk while concatenating to the final file.
1101
1102PHONY += modules
1103modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
1104        $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
1105        @echo '  Building modules, stage 2.';
1106        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1107        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modbuild
1108
1109
1110# Target to prepare building external modules
1111PHONY += modules_prepare
1112modules_prepare: prepare scripts
1113
1114# Target to install modules
1115PHONY += modules_install
1116modules_install: _modinst_ _modinst_post
1117
1118PHONY += _modinst_
1119_modinst_:
1120        @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
1121                echo "Warning: you may need to install module-init-tools"; \
1122                echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
1123                sleep 1; \
1124        fi
1125        @rm -rf $(MODLIB)/kernel
1126        @rm -f $(MODLIB)/source
1127        @mkdir -p $(MODLIB)/kernel
1128        @ln -s $(srctree) $(MODLIB)/source
1129        @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
1130                rm -f $(MODLIB)/build ; \
1131                ln -s $(objtree) $(MODLIB)/build ; \
1132        fi
1133        @cp -f $(objtree)/modules.order $(MODLIB)/
1134        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1135
1136# This depmod is only for convenience to give the initial
1137# boot a modules.dep even before / is mounted read-write.  However the
1138# boot script depmod is the master version.
1139PHONY += _modinst_post
1140_modinst_post: _modinst_
1141        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.fwinst obj=firmware __fw_modinst
1142        $(call cmd,depmod)
1143
1144else # CONFIG_MODULES
1145
1146# Modules not configured
1147# ---------------------------------------------------------------------------
1148
1149modules modules_install: FORCE
1150        @echo
1151        @echo "The present kernel configuration has modules disabled."
1152        @echo "Type 'make config' and enable loadable module support."
1153        @echo "Then build a kernel with module support enabled."
1154        @echo
1155        @exit 1
1156
1157endif # CONFIG_MODULES
1158
1159###
1160# Cleaning is done on three levels.
1161# make clean     Delete most generated files
1162#                Leave enough to build external modules
1163# make mrproper  Delete the current configuration, and all generated files
1164# make distclean Remove editor backup files, patch leftover files and the like
1165
1166# Directories & files removed with 'make clean'
1167CLEAN_DIRS  += $(MODVERDIR)
1168CLEAN_FILES +=  vmlinux System.map \
1169                .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
1170
1171# Directories & files removed with 'make mrproper'
1172MRPROPER_DIRS  += include/config include2 usr/include
1173MRPROPER_FILES += .config .config.old include/asm .version .old_version \
1174                  include/linux/autoconf.h include/linux/version.h      \
1175                  include/linux/utsrelease.h                            \
1176                  include/linux/bounds.h include/asm*/asm-offsets.h     \
1177                  Module.symvers Module.markers tags TAGS cscope*
1178
1179# clean - Delete most, but leave enough to build external modules
1180#
1181clean: rm-dirs  := $(CLEAN_DIRS)
1182clean: rm-files := $(CLEAN_FILES)
1183clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs) Documentation)
1184
1185PHONY += $(clean-dirs) clean archclean
1186$(clean-dirs):
1187        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1188
1189clean: archclean $(clean-dirs)
1190        $(call cmd,rmdirs)
1191        $(call cmd,rmfiles)
1192        @find . $(RCS_FIND_IGNORE) \
1193                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1194                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1195                -o -name '*.symtypes' -o -name 'modules.order' \
1196                -o -name 'Module.markers' -o -name '.tmp_*.o.*' \) \
1197                -type f -print | xargs rm -f
1198
1199# mrproper - Delete all generated files, including .config
1200#
1201mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
1202mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1203mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
1204
1205PHONY += $(mrproper-dirs) mrproper archmrproper
1206$(mrproper-dirs):
1207        $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1208
1209mrproper: clean archmrproper $(mrproper-dirs)
1210        $(call cmd,rmdirs)
1211        $(call cmd,rmfiles)
1212
1213# distclean
1214#
1215PHONY += distclean
1216
1217distclean: mrproper
1218        @find $(srctree) $(RCS_FIND_IGNORE) \
1219                \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1220                -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1221                -o -name '.*.rej' -o -size 0 \
1222                -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1223                -type f -print | xargs rm -f
1224
1225
1226# Packaging of the kernel to various formats
1227# ---------------------------------------------------------------------------
1228# rpm target kept for backward compatibility
1229package-dir     := $(srctree)/scripts/package
1230
1231%pkg: include/config/kernel.release FORCE
1232        $(Q)$(MAKE) $(build)=$(package-dir) $@
1233rpm: include/config/kernel.release FORCE
1234        $(Q)$(MAKE) $(build)=$(package-dir) $@
1235
1236
1237# Brief documentation of the typical targets used
1238# ---------------------------------------------------------------------------
1239
1240boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig)
1241boards := $(notdir $(boards))
1242board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig))
1243board-dirs := $(sort $(notdir $(board-dirs:/=)))
1244
1245help:
1246        @echo  'Cleaning targets:'
1247        @echo  '  clean           - Remove most generated files but keep the config and'
1248        @echo  '                    enough build support to build external modules'
1249        @echo  '  mrproper        - Remove all generated files + config + various backup files'
1250        @echo  '  distclean       - mrproper + remove editor backup and patch files'
1251        @echo  ''
1252        @echo  'Configuration targets:'
1253        @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1254        @echo  ''
1255        @echo  'Other generic targets:'
1256        @echo  '  all             - Build all targets marked with [*]'
1257        @echo  '* vmlinux         - Build the bare kernel'
1258        @echo  '* modules         - Build all modules'
1259        @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1260        @echo  '  firmware_install- Install all firmware to INSTALL_FW_PATH'
1261        @echo  '                    (default: $$(INSTALL_MOD_PATH)/lib/firmware)'
1262        @echo  '  dir/            - Build all files in dir and below'
1263        @echo  '  dir/file.[ois]  - Build specified target only'
1264        @echo  '  dir/file.ko     - Build module including final link'
1265        @echo  '  prepare         - Set up for building external modules'
1266        @echo  '  tags/TAGS       - Generate tags file for editors'
1267        @echo  '  cscope          - Generate cscope index'
1268        @echo  '  kernelrelease   - Output the release version string'
1269        @echo  '  kernelversion   - Output the version stored in Makefile'
1270        @echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1271         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
1272         echo  ''
1273        @echo  'Static analysers'
1274        @echo  '  checkstack      - Generate a list of stack hogs'
1275        @echo  '  namespacecheck  - Name space analysis on compiled kernel'
1276        @echo  '  versioncheck    - Sanity check on version.h usage'
1277        @echo  '  includecheck    - Check for duplicate included header files'
1278        @echo  '  export_report   - List the usages of all exported symbols'
1279        @echo  '  headers_check   - Sanity check on exported headers'; \
1280         echo  ''
1281        @echo  'Kernel packaging:'
1282        @$(MAKE) $(build)=$(package-dir) help
1283        @echo  ''
1284        @echo  'Documentation targets:'
1285        @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1286        @echo  ''
1287        @echo  'Architecture specific targets ($(SRCARCH)):'
1288        @$(if $(archhelp),$(archhelp),\
1289                echo '  No architecture specific help defined for $(SRCARCH)')
1290        @echo  ''
1291        @$(if $(boards), \
1292                $(foreach b, $(boards), \
1293                printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1294                echo '')
1295        @$(if $(board-dirs), \
1296                $(foreach b, $(board-dirs), \
1297                printf "  %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \
1298                printf "  %-16s - Show all of the above\\n" help-boards; \
1299                echo '')
1300
1301        @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1302        @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
1303        @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
1304        @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
1305        @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
1306        @echo  ''
1307        @echo  'Execute "make" or "make all" to build all targets marked with [*] '
1308        @echo  'For further info see the ./README file'
1309
1310
1311help-board-dirs := $(addprefix help-,$(board-dirs))
1312
1313help-boards: $(help-board-dirs)
1314
1315boards-per-dir = $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))
1316
1317$(help-board-dirs): help-%:
1318        @echo  'Architecture specific targets ($(SRCARCH) $*):'
1319        @$(if $(boards-per-dir), \
1320                $(foreach b, $(boards-per-dir), \
1321                printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \
1322                echo '')
1323
1324
1325# Documentation targets
1326# ---------------------------------------------------------------------------
1327%docs: scripts_basic FORCE
1328        $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1329
1330else # KBUILD_EXTMOD
1331
1332###
1333# External module support.
1334# When building external modules the kernel used as basis is considered
1335# read-only, and no consistency checks are made and the make
1336# system is not used on the basis kernel. If updates are required
1337# in the basis kernel ordinary make commands (without M=...) must
1338# be used.
1339#
1340# The following are the only valid targets when building external
1341# modules.
1342# make M=dir clean     Delete all automatically generated files
1343# make M=dir modules   Make all modules in specified dir
1344# make M=dir           Same as 'make M=dir modules'
1345# make M=dir modules_install
1346#                      Install the modules built in the module directory
1347#                      Assumes install directory is already created
1348
1349# We are always building modules
1350KBUILD_MODULES := 1
1351PHONY += crmodverdir
1352crmodverdir:
1353        $(cmd_crmodverdir)
1354
1355PHONY += $(objtree)/Module.symvers
1356$(objtree)/Module.symvers:
1357        @test -e $(objtree)/Module.symvers || ( \
1358        echo; \
1359        echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1360        echo "           is missing; modules will have no dependencies and modversions."; \
1361        echo )
1362
1363module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1364PHONY += $(module-dirs) modules
1365$(module-dirs): crmodverdir $(objtree)/Module.symvers
1366        $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1367
1368modules: $(module-dirs)
1369        @echo '  Building modules, stage 2.';
1370        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1371
1372PHONY += modules_install
1373modules_install: _emodinst_ _emodinst_post
1374
1375install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1376PHONY += _emodinst_
1377_emodinst_:
1378        $(Q)mkdir -p $(MODLIB)/$(install-dir)
1379        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
1380
1381PHONY += _emodinst_post
1382_emodinst_post: _emodinst_
1383        $(call cmd,depmod)
1384
1385clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1386
1387PHONY += $(clean-dirs) clean
1388$(clean-dirs):
1389        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1390
1391clean:  rm-dirs := $(MODVERDIR)
1392clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
1393clean: $(clean-dirs)
1394        $(call cmd,rmdirs)
1395        $(call cmd,rmfiles)
1396        @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1397                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1398                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1399                -type f -print | xargs rm -f
1400
1401help:
1402        @echo  '  Building external modules.'
1403        @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
1404        @echo  ''
1405        @echo  '  modules         - default target, build the module(s)'
1406        @echo  '  modules_install - install the module'
1407        @echo  '  clean           - remove generated files in module directory only'
1408        @echo  ''
1409
1410# Dummies...
1411PHONY += prepare scripts
1412prepare: ;
1413scripts: ;
1414endif # KBUILD_EXTMOD
1415
1416# Generate tags for editors
1417# ---------------------------------------------------------------------------
1418
1419#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1420#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1421#Adding $(srctree) adds about 20M on i386 to the size of the output file!
1422
1423ifeq ($(src),$(obj))
1424__srctree =
1425else
1426__srctree = $(srctree)/
1427endif
1428
1429ifeq ($(ALLSOURCE_ARCHS),)
1430ifeq ($(ARCH),um)
1431ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1432else
1433ALLINCLUDE_ARCHS := $(SRCARCH)
1434endif
1435else
1436#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
1437ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1438endif
1439
1440ALLSOURCE_ARCHS := $(SRCARCH)
1441
1442define find-sources
1443        ( for arch in $(ALLSOURCE_ARCHS) ; do \
1444               find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
1445                    -name $1 -print; \
1446          done ; \
1447          find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1448               -name $1 -print; \
1449          find $(__srctree)include $(RCS_FIND_IGNORE) \
1450               \( -name config -o -name 'asm-*' \) -prune \
1451               -o -name $1 -print; \
1452          for arch in $(ALLINCLUDE_ARCHS) ; do \
1453               test -e $(__srctree)include/asm-$${arch} && \
1454                 find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
1455                    -name $1 -print; \
1456               test -e $(__srctree)arch/$${arch}/include/asm && \
1457                 find $(__srctree)arch/$${arch}/include/asm $(RCS_FIND_IGNORE) \
1458                    -name $1 -print; \
1459          done ; \
1460          find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1461               -name $1 -print; \
1462          find $(__srctree) $(RCS_FIND_IGNORE) \
1463               \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
1464               -name $1 -print; \
1465          )
1466endef
1467
1468define all-sources
1469        $(call find-sources,'*.[chS]')
1470endef
1471define all-kconfigs
1472        $(call find-sources,'Kconfig*')
1473endef
1474define all-defconfigs
1475        $(call find-sources,'defconfig')
1476endef
1477
1478define xtags
1479        if $1 --version 2>&1 | grep -iq exuberant; then \
1480            $(all-sources) | xargs $1 -a \
1481                -I __initdata,__exitdata,__acquires,__releases \
1482                -I __read_mostly,____cacheline_aligned,____cacheline_aligned_in_smp,____cacheline_internodealigned_in_smp \
1483                -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1484                --extra=+f --c-kinds=+px \
1485                --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
1486            $(all-kconfigs) | xargs $1 -a \
1487                --langdef=kconfig \
1488                --language-force=kconfig \
1489                --regex-kconfig='/^[[:blank:]]*(menu|)config[[:blank:]]+([[:alnum:]_]+)/\2/'; \
1490            $(all-defconfigs) | xargs -r $1 -a \
1491                --langdef=dotconfig \
1492                --language-force=dotconfig \
1493                --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
1494        elif $1 --version 2>&1 | grep -iq emacs; then \
1495            $(all-sources) | xargs $1 -a; \
1496            $(all-kconfigs) | xargs $1 -a \
1497                --regex='/^[ \t]*\(\(menu\)*config\)[ \t]+\([a-zA-Z0-9_]+\)/\3/'; \
1498            $(all-defconfigs) | xargs -r $1 -a \
1499                --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1500        else \
1501            $(all-sources) | xargs $1 -a; \
1502        fi
1503endef
1504
1505quiet_cmd_cscope-file = FILELST cscope.files
1506      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1507
1508quiet_cmd_cscope = MAKE    cscope.out
1509      cmd_cscope = cscope -b -f cscope.out
1510
1511cscope: FORCE
1512        $(call cmd,cscope-file)
1513        $(call cmd,cscope)
1514
1515quiet_cmd_TAGS = MAKE   $@
1516define cmd_TAGS
1517        rm -f $@; \
1518        $(call xtags,etags)
1519endef
1520
1521TAGS: FORCE
1522        $(call cmd,TAGS)
1523
1524quiet_cmd_tags = MAKE   $@
1525define cmd_tags
1526        rm -f $@; \
1527        $(call xtags,ctags)
1528endef
1529
1530tags: FORCE
1531        $(call cmd,tags)
1532
1533
1534# Scripts to check various things for consistency
1535# ---------------------------------------------------------------------------
1536
1537includecheck:
1538        find * $(RCS_FIND_IGNORE) \
1539                -name '*.[hcS]' -type f -print | sort \
1540                | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl
1541
1542versioncheck:
1543        find * $(RCS_FIND_IGNORE) \
1544                -name '*.[hcS]' -type f -print | sort \
1545                | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
1546
1547namespacecheck:
1548        $(PERL) $(srctree)/scripts/namespace.pl
1549
1550export_report:
1551        $(PERL) $(srctree)/scripts/export_report.pl
1552
1553endif #ifeq ($(config-targets),1)
1554endif #ifeq ($(mixed-targets),1)
1555
1556PHONY += checkstack kernelrelease kernelversion
1557
1558# UML needs a little special treatment here.  It wants to use the host
1559# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
1560# else wants $(ARCH), including people doing cross-builds, which means
1561# that $(SUBARCH) doesn't work here.
1562ifeq ($(ARCH), um)
1563CHECKSTACK_ARCH := $(SUBARCH)
1564else
1565CHECKSTACK_ARCH := $(ARCH)
1566endif
1567checkstack:
1568        $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1569        $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
1570
1571kernelrelease:
1572        $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1573        $(error kernelrelease not valid - run 'make prepare' to update it))
1574kernelversion:
1575        @echo $(KERNELVERSION)
1576
1577# Single targets
1578# ---------------------------------------------------------------------------
1579# Single targets are compatible with:
1580# - build with mixed source and output
1581# - build with separate output dir 'make O=...'
1582# - external modules
1583#
1584#  target-dir => where to store outputfile
1585#  build-dir  => directory in kernel source tree to use
1586
1587ifeq ($(KBUILD_EXTMOD),)
1588        build-dir  = $(patsubst %/,%,$(dir $@))
1589        target-dir = $(dir $@)
1590else
1591        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1592        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1593        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1594endif
1595
1596%.s: %.c prepare scripts FORCE
1597        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1598%.i: %.c prepare scripts FORCE
1599        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1600%.o: %.c prepare scripts FORCE
1601        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1602%.lst: %.c prepare scripts FORCE
1603        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1604%.s: %.S prepare scripts FORCE
1605        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1606%.o: %.S prepare scripts FORCE
1607        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1608%.symtypes: %.c prepare scripts FORCE
1609        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1610
1611# Modules
1612/: prepare scripts FORCE
1613        $(cmd_crmodverdir)
1614        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1615        $(build)=$(build-dir)
1616%/: prepare scripts FORCE
1617        $(cmd_crmodverdir)
1618        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1619        $(build)=$(build-dir)
1620%.ko: prepare scripts FORCE
1621        $(cmd_crmodverdir)
1622        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
1623        $(build)=$(build-dir) $(@:.ko=.o)
1624        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
1625
1626# FIXME Should go into a make.lib or something 
1627# ===========================================================================
1628
1629quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
1630      cmd_rmdirs = rm -rf $(rm-dirs)
1631
1632quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
1633      cmd_rmfiles = rm -f $(rm-files)
1634
1635# Run depmod only if we have System.map and depmod is executable
1636quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
1637      cmd_depmod = \
1638        if [ -r System.map -a -x $(DEPMOD) ]; then                              \
1639                $(DEPMOD) -ae -F System.map                                     \
1640                $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
1641                $(KERNELRELEASE);                                               \
1642        fi
1643
1644# Create temporary dir for module support files
1645# clean it up only when building all modules
1646cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
1647                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
1648
1649a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
1650          $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
1651          $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1652
1653quiet_cmd_as_o_S = AS      $@
1654cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
1655
1656# read all saved command lines
1657
1658targets := $(wildcard $(sort $(targets)))
1659cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1660
1661ifneq ($(cmd_files),)
1662  $(cmd_files): ;       # Do not try to update included dependency files
1663  include $(cmd_files)
1664endif
1665
1666# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1667# Usage:
1668# $(Q)$(MAKE) $(clean)=dir
1669clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1670
1671endif   # skip-makefile
1672
1673PHONY += FORCE
1674FORCE:
1675
1676# Declare the contents of the .PHONY variable as phony.  We keep that
1677# information in a variable se we can use it in if_changed and friends.
1678.PHONY: $(PHONY)
1679