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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [Makefile] - Blame information for rev 3

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VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 24
EXTRAVERSION =
NAME = Arr Matey! A Hairy Bilge Rat!
 
# *DOCUMENTATION*
# To see a list of typical targets execute "make help"
# More info can be located in ./README
# Comments in this file are targeted only to the developer, do not
# expect to learn how to build the kernel reading this file.
 
# Do not:
# o  use make's built-in rules and variables
#    (this increases performance and avoids hard-to-debug behaviour);
# o  print "Entering directory ...";
MAKEFLAGS += -rR --no-print-directory
 
# We are using a recursive build, so we need to do a little thinking
# to get the ordering right.
#
# Most importantly: sub-Makefiles should only ever modify files in
# their own directory. If in some directory we have a dependency on
# a file in another dir (which doesn't happen often, but it's often
# unavoidable when linking the built-in.o targets which finally
# turn into vmlinux), we will call a sub make in that other dir, and
# after that we are sure that everything which is in that other dir
# is now up to date.
#
# The only cases where we need to modify files which have global
# effects are thus separated out and done before the recursive
# descending is started. They are now explicitly listed as the
# prepare rule.
 
# To put more focus on warnings, be less verbose as default
# Use 'make V=1' to see the full commands
 
ifdef V
  ifeq ("$(origin V)", "command line")
    KBUILD_VERBOSE = $(V)
  endif
endif
ifndef KBUILD_VERBOSE
  KBUILD_VERBOSE = 0
endif
 
# Call a source code checker (by default, "sparse") as part of the
# C compilation.
#
# Use 'make C=1' to enable checking of only re-compiled files.
# Use 'make C=2' to enable checking of *all* source files, regardless
# of whether they are re-compiled or not.
#
# See the file "Documentation/sparse.txt" for more details, including
# where to get the "sparse" utility.
 
ifdef C
  ifeq ("$(origin C)", "command line")
    KBUILD_CHECKSRC = $(C)
  endif
endif
ifndef KBUILD_CHECKSRC
  KBUILD_CHECKSRC = 0
endif
 
# Use make M=dir to specify directory of external module to build
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRS
  KBUILD_EXTMOD ?= $(SUBDIRS)
endif
ifdef M
  ifeq ("$(origin M)", "command line")
    KBUILD_EXTMOD := $(M)
  endif
endif
 
 
# kbuild supports saving output files in a separate directory.
# To locate output files in a separate directory two syntaxes are supported.
# In both cases the working directory must be the root of the kernel src.
# 1) O=
# Use "make O=dir/to/store/output/files/"
#
# 2) Set KBUILD_OUTPUT
# Set the environment variable KBUILD_OUTPUT to point to the directory
# where the output files shall be placed.
# export KBUILD_OUTPUT=dir/to/store/output/files/
# make
#
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.
 
 
# KBUILD_SRC is set on invocation of make in OBJ directory
# KBUILD_SRC is not intended to be used by the regular user (for now)
ifeq ($(KBUILD_SRC),)
 
# OK, Make called in directory where kernel src resides
# Do we want to locate output files in a separate directory?
ifdef O
  ifeq ("$(origin O)", "command line")
    KBUILD_OUTPUT := $(O)
  endif
endif
 
# That's our default target when none is given on the command line
PHONY := _all
_all:
 
# Cancel implicit rules on top Makefile
$(CURDIR)/Makefile Makefile: ;
 
ifneq ($(KBUILD_OUTPUT),)
# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
     $(error output directory "$(saved-output)" does not exist))
 
PHONY += $(MAKECMDGOALS) sub-make
 
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
        $(Q)@:
 
sub-make: FORCE
        $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
        KBUILD_SRC=$(CURDIR) \
        KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile \
        $(filter-out _all sub-make,$(MAKECMDGOALS))
 
# Leave processing to above invocation of make
skip-makefile := 1
endif # ifneq ($(KBUILD_OUTPUT),)
endif # ifeq ($(KBUILD_SRC),)
 
# We process the rest of the Makefile if this is the final invocation of make
ifeq ($(skip-makefile),)
 
# If building an external module we do not care about the all: rule
# but instead _all depend on modules
PHONY += all
ifeq ($(KBUILD_EXTMOD),)
_all: all
else
_all: modules
endif
 
srctree         := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
TOPDIR          := $(srctree)
# FIXME - TOPDIR is obsolete, use srctree/objtree
objtree         := $(CURDIR)
src             := $(srctree)
obj             := $(objtree)
 
VPATH           := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
 
export srctree objtree VPATH TOPDIR
 
 
# SUBARCH tells the usermode build what the underlying arch is.  That is set
# first, and if a usermode build is happening, the "ARCH=um" on the command
# line overrides the setting of ARCH below.  If a native build is happening,
# then ARCH is assigned, getting whatever value it gets normally, and
# SUBARCH is subsequently ignored.
 
SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
                                  -e s/arm.*/arm/ -e s/sa110/arm/ \
                                  -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                  -e s/sh[234].*/sh/ )
 
# Cross compiling and selecting different set of gcc/bin-utils
# ---------------------------------------------------------------------------
#
# When performing cross compilation for other architectures ARCH shall be set
# to the target architecture. (See arch/* for the possibilities).
# ARCH can be set during invocation of make:
# make ARCH=ia64
# Another way is to have ARCH set in the environment.
# The default ARCH is the host where make is executed.
 
# CROSS_COMPILE specify the prefix used for all executables used
# during compilation. Only gcc and related bin-utils executables
# are prefixed with $(CROSS_COMPILE).
# CROSS_COMPILE can be set on the command line
# make CROSS_COMPILE=ia64-linux-
# Alternatively CROSS_COMPILE can be set in the environment.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
 
ARCH            ?= $(SUBARCH)
CROSS_COMPILE   ?=
 
# Architecture as present in compile.h
UTS_MACHINE     := $(ARCH)
SRCARCH         := $(ARCH)
 
# Additional ARCH settings for x86
ifeq ($(ARCH),i386)
        SRCARCH := x86
endif
ifeq ($(ARCH),x86_64)
        SRCARCH := x86
endif
 
KCONFIG_CONFIG  ?= .config
 
# SHELL used by kbuild
CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
          else if [ -x /bin/bash ]; then echo /bin/bash; \
          else echo sh; fi ; fi)
 
HOSTCC       = gcc
HOSTCXX      = g++
HOSTCFLAGS   = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
 
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
 
KBUILD_MODULES :=
KBUILD_BUILTIN := 1
 
#       If we have only "make modules", don't compile built-in objects.
#       When we're building modules with modversions, we need to consider
#       the built-in objects during the descend as well, in order to
#       make sure the checksums are up to date before we record them.
 
ifeq ($(MAKECMDGOALS),modules)
  KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
endif
 
#       If we have "make  modules", compile modules
#       in addition to whatever we do anyway.
#       Just "make" or "make all" shall build modules as well
 
ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
  KBUILD_MODULES := 1
endif
 
ifeq ($(MAKECMDGOALS),)
  KBUILD_MODULES := 1
endif
 
export KBUILD_MODULES KBUILD_BUILTIN
export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
 
# Beautify output
# ---------------------------------------------------------------------------
#
# Normally, we echo the whole command before executing it. By making
# that echo $($(quiet)$(cmd)), we now have the possibility to set
# $(quiet) to choose other forms of output instead, e.g.
#
#         quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
#         cmd_cc_o_c       = $(CC) $(c_flags) -c -o $@ $<
#
# If $(quiet) is empty, the whole command will be printed.
# If it is set to "quiet_", only the short version will be printed.
# If it is set to "silent_", nothing will be printed at all, since
# the variable $(silent_cmd_cc_o_c) doesn't exist.
#
# A simple variant is to prefix commands with $(Q) - that's useful
# for commands that shall be hidden in non-verbose mode.
#
#       $(Q)ln $@ :<
#
# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
# If KBUILD_VERBOSE equals 1 then the above command is displayed.
 
ifeq ($(KBUILD_VERBOSE),1)
  quiet =
  Q =
else
  quiet=quiet_
  Q = @
endif
 
# If the user is running make -s (silent mode), suppress echoing of
# commands
 
ifneq ($(findstring s,$(MAKEFLAGS)),)
  quiet=silent_
endif
 
export quiet Q KBUILD_VERBOSE
 
 
# Look for make include files relative to root of kernel src
MAKEFLAGS += --include-dir=$(srctree)
 
# We need some generic definitions (do not try to remake the file).
$(srctree)/scripts/Kbuild.include: ;
include $(srctree)/scripts/Kbuild.include
 
# Make variables (CC, etc...)
 
AS              = $(CROSS_COMPILE)as
LD              = $(CROSS_COMPILE)ld
CC              = $(CROSS_COMPILE)gcc
CPP             = $(CC) -E
AR              = $(CROSS_COMPILE)ar
NM              = $(CROSS_COMPILE)nm
STRIP           = $(CROSS_COMPILE)strip
OBJCOPY         = $(CROSS_COMPILE)objcopy
OBJDUMP         = $(CROSS_COMPILE)objdump
AWK             = awk
GENKSYMS        = scripts/genksyms/genksyms
DEPMOD          = /sbin/depmod
KALLSYMS        = scripts/kallsyms
PERL            = perl
CHECK           = sparse
 
CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
MODFLAGS        = -DMODULE
CFLAGS_MODULE   = $(MODFLAGS)
AFLAGS_MODULE   = $(MODFLAGS)
LDFLAGS_MODULE  =
CFLAGS_KERNEL   =
AFLAGS_KERNEL   =
 
 
# Use LINUXINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
LINUXINCLUDE    := -Iinclude \
                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
                   -include include/linux/autoconf.h
 
KBUILD_CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
 
KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                   -fno-strict-aliasing -fno-common \
                   -Werror-implicit-function-declaration
KBUILD_AFLAGS   := -D__ASSEMBLY__
 
# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
 
export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
 
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 
# When compiling out-of-tree modules, put MODVERDIR in the module
# tree rather than in the kernel tree. The kernel tree might
# even be read-only.
export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
 
# Files to ignore in find ... statements
 
RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
 
# ===========================================================================
# Rules shared between *config targets and build targets
 
# Basic helpers built in scripts/
PHONY += scripts_basic
scripts_basic:
        $(Q)$(MAKE) $(build)=scripts/basic
 
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;
 
PHONY += outputmakefile
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
outputmakefile:
ifneq ($(KBUILD_SRC),)
        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
            $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
 
# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
# For example 'make oldconfig all'.
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).
 
no-dot-config-targets := clean mrproper distclean \
                         cscope TAGS tags help %docs check% \
                         include/linux/version.h headers_% \
                         kernelrelease kernelversion
 
config-targets := 0
mixed-targets  := 0
dot-config     := 1
 
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
        ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
                dot-config := 0
        endif
endif
 
ifeq ($(KBUILD_EXTMOD),)
        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
                config-targets := 1
                ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
                        mixed-targets := 1
                endif
        endif
endif
 
ifeq ($(mixed-targets),1)
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.
 
%:: FORCE
        $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
 
else
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
 
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
include $(srctree)/arch/$(SRCARCH)/Makefile
export KBUILD_DEFCONFIG
 
config %config: scripts_basic outputmakefile FORCE
        $(Q)mkdir -p include/linux include/config
        $(Q)$(MAKE) $(build)=scripts/kconfig $@
 
else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.
 
ifeq ($(KBUILD_EXTMOD),)
# Additional helpers built in scripts/
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
scripts: scripts_basic include/config/auto.conf
        $(Q)$(MAKE) $(build)=$(@)
 
# Objects we will link into vmlinux / subdirs we need to visit
init-y          := init/
drivers-y       := drivers/ sound/
net-y           := net/
libs-y          := lib/
core-y          := usr/
endif # KBUILD_EXTMOD
 
ifeq ($(dot-config),1)
# Read in config
-include include/config/auto.conf
 
ifeq ($(KBUILD_EXTMOD),)
# Read in dependencies to all Kconfig* files, make sure to run
# oldconfig if changes are detected.
-include include/config/auto.conf.cmd
 
# To avoid any implicit rule to kick in, define an empty command
$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
 
# If .config is newer than include/config/auto.conf, someone tinkered
# with it and forgot to run make oldconfig.
# if auto.conf.cmd is missing then we are probably in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
        $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
else
# external modules needs include/linux/autoconf.h and include/config/auto.conf
# but do not care if they are up-to-date. Use auto.conf to trigger the test
PHONY += include/config/auto.conf
 
include/config/auto.conf:
        $(Q)test -e include/linux/autoconf.h -a -e $@ || (              \
        echo;                                                           \
        echo "  ERROR: Kernel configuration is invalid.";               \
        echo "         include/linux/autoconf.h or $@ are missing.";    \
        echo "         Run 'make oldconfig && make prepare' on kernel src to fix it.";    \
        echo;                                                           \
        /bin/false)
 
endif # KBUILD_EXTMOD
 
else
# Dummy target needed, because used as prerequisite
include/config/auto.conf: ;
endif # $(dot-config)
 
# The all: target is the default when no target is given on the
# command line.
# This allow a user to issue only 'make' to build a kernel including modules
# Defaults vmlinux but it is usually overridden in the arch makefile
all: vmlinux
 
ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
KBUILD_CFLAGS   += -Os
else
KBUILD_CFLAGS   += -O2
endif
 
include $(srctree)/arch/$(SRCARCH)/Makefile
 
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS   += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
KBUILD_CFLAGS   += -fomit-frame-pointer
endif
 
ifdef CONFIG_DEBUG_INFO
KBUILD_CFLAGS   += -g
KBUILD_AFLAGS   += -gdwarf-2
endif
 
# Force gcc to behave correct even for buggy distributions
KBUILD_CFLAGS         += $(call cc-option, -fno-stack-protector)
 
# arch Makefile may override CC so keep this after arch Makefile is included
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS     += $(NOSTDINC_FLAGS)
 
# warn about C99 declaration after statement
KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
 
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += $(call cc-option,-Wno-pointer-sign,)
 
# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
# But warn user when we do so
warn-assign = \
$(warning "WARNING: Appending $$K$(1) ($(K$(1))) from $(origin K$(1)) to kernel $$$(1)")
 
ifneq ($(KCPPFLAGS),)
        $(call warn-assign,CPPFLAGS)
        KBUILD_CPPFLAGS += $(KCPPFLAGS)
endif
ifneq ($(KAFLAGS),)
        $(call warn-assign,AFLAGS)
        KBUILD_AFLAGS += $(KAFLAGS)
endif
ifneq ($(KCFLAGS),)
        $(call warn-assign,CFLAGS)
        KBUILD_CFLAGS += $(KCFLAGS)
endif
 
# Use --build-id when available.
LDFLAGS_BUILD_ID = $(patsubst -Wl$(comma)%,%,\
                              $(call ld-option, -Wl$(comma)--build-id,))
LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID)
LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID)
 
# Default kernel image to build when no specific target is given.
# KBUILD_IMAGE may be overruled on the command line or
# set in the environment
# Also any assignments in arch/$(ARCH)/Makefile take precedence over
# this default value
export KBUILD_IMAGE ?= vmlinux
 
#
# INSTALL_PATH specifies where to place the updated kernel and system map
# images. Default is /boot, but you can set it to other values
export  INSTALL_PATH ?= /boot
 
#
# INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
# relocations required by build roots.  This is not defined in the
# makefile but the argument can be passed to make if needed.
#
 
MODLIB  = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
export MODLIB
 
#
#  INSTALL_MOD_STRIP, if defined, will cause modules to be
#  stripped after they are installed.  If INSTALL_MOD_STRIP is '1', then
#  the default option --strip-debug will be used.  Otherwise,
#  INSTALL_MOD_STRIP will used as the options to the strip command.
 
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
mod_strip_cmd = $(STRIP) --strip-debug
else
mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
endif # INSTALL_MOD_STRIP=1
else
mod_strip_cmd = true
endif # INSTALL_MOD_STRIP
export mod_strip_cmd
 
 
ifeq ($(KBUILD_EXTMOD),)
core-y          += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
 
vmlinux-dirs    := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
                     $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
                     $(net-y) $(net-m) $(libs-y) $(libs-m)))
 
vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
                     $(init-n) $(init-) \
                     $(core-n) $(core-) $(drivers-n) $(drivers-) \
                     $(net-n)  $(net-)  $(libs-n)    $(libs-))))
 
init-y          := $(patsubst %/, %/built-in.o, $(init-y))
core-y          := $(patsubst %/, %/built-in.o, $(core-y))
drivers-y       := $(patsubst %/, %/built-in.o, $(drivers-y))
net-y           := $(patsubst %/, %/built-in.o, $(net-y))
libs-y1         := $(patsubst %/, %/lib.a, $(libs-y))
libs-y2         := $(patsubst %/, %/built-in.o, $(libs-y))
libs-y          := $(libs-y1) $(libs-y2)
 
# Build vmlinux
# ---------------------------------------------------------------------------
# vmlinux is built from the objects selected by $(vmlinux-init) and
# $(vmlinux-main). Most are built-in.o files from top-level directories
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
# Ordering when linking is important, and $(vmlinux-init) must be first.
#
# vmlinux
#   ^
#   |
#   +-< $(vmlinux-init)
#   |   +--< init/version.o + more
#   |
#   +--< $(vmlinux-main)
#   |    +--< driver/built-in.o mm/built-in.o + more
#   |
#   +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
#
# vmlinux version (uname -v) cannot be updated during normal
# descending-into-subdirs phase since we do not yet know if we need to
# update vmlinux.
# Therefore this step is delayed until just before final link of vmlinux -
# except in the kallsyms case where it is done just before adding the
# symbols to the kernel.
#
# System.map is generated to document addresses of all kernel symbols
 
vmlinux-init := $(head-y) $(init-y)
vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
vmlinux-all  := $(vmlinux-init) $(vmlinux-main)
vmlinux-lds  := arch/$(SRCARCH)/kernel/vmlinux.lds
export KBUILD_VMLINUX_OBJS := $(vmlinux-all)
 
# Rule to link vmlinux - also used during CONFIG_KALLSYMS
# May be overridden by arch/$(ARCH)/Makefile
quiet_cmd_vmlinux__ ?= LD      $@
      cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
      -T $(vmlinux-lds) $(vmlinux-init)                          \
      --start-group $(vmlinux-main) --end-group                  \
      $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o FORCE ,$^)
 
# Generate new vmlinux version
quiet_cmd_vmlinux_version = GEN     .version
      cmd_vmlinux_version = set -e;                     \
        if [ ! -r .version ]; then                      \
          rm -f .version;                               \
          echo 1 >.version;                             \
        else                                            \
          mv .version .old_version;                     \
          expr 0$$(cat .old_version) + 1 >.version;     \
        fi;                                             \
        $(MAKE) $(build)=init
 
# Generate System.map
quiet_cmd_sysmap = SYSMAP
      cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
 
# Link of vmlinux
# If CONFIG_KALLSYMS is set .version is already updated
# Generate System.map and verify that the content is consistent
# Use + in front of the vmlinux_version rule to silent warning with make -j2
# First command is ':' to allow us to use + in front of the rule
define rule_vmlinux__
        :
        $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
 
        $(call cmd,vmlinux__)
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
 
        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
          echo '  $($(quiet)cmd_sysmap)  System.map' &&)                     \
        $(cmd_sysmap) $@ System.map;                                         \
        if [ $$? -ne 0 ]; then                                               \
                rm -f $@;                                                    \
                /bin/false;                                                  \
        fi;
        $(verify_kallsyms)
endef
 
 
ifdef CONFIG_KALLSYMS
# Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
# It's a three stage process:
# o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
#   empty
#   Running kallsyms on that gives us .tmp_kallsyms1.o with
#   the right size - vmlinux version (uname -v) is updated during this step
# o .tmp_vmlinux2 now has a __kallsyms section of the right size,
#   but due to the added section, some addresses have shifted.
#   From here, we generate a correct .tmp_kallsyms2.o
# o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
# o Verify that the System.map from vmlinux matches the map from
#   .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
# o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
#   .tmp_vmlinux3 and .tmp_kallsyms3.o.  This is only meant as a
#   temporary bypass to allow the kernel to be built while the
#   maintainers work out what went wrong with kallsyms.
 
ifdef CONFIG_KALLSYMS_EXTRA_PASS
last_kallsyms := 3
else
last_kallsyms := 2
endif
 
kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
 
define verify_kallsyms
        $(Q)$(if $($(quiet)cmd_sysmap),                                      \
          echo '  $($(quiet)cmd_sysmap)  .tmp_System.map' &&)                \
          $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
        $(Q)cmp -s System.map .tmp_System.map ||                             \
                (echo Inconsistent kallsyms data;                            \
                 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS;                \
                 rm .tmp_kallsyms* ; /bin/false )
endef
 
# Update vmlinux version before link
# Use + in front of this rule to silent warning about make -j1
# First command is ':' to allow us to use + in front of this rule
cmd_ksym_ld = $(cmd_vmlinux__)
define rule_ksym_ld
        :
        +$(call cmd,vmlinux_version)
        $(call cmd,vmlinux__)
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
endef
 
# Generate .S file with all kernel symbols
quiet_cmd_kallsyms = KSYM    $@
      cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
                     $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
 
.tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
        $(call if_changed_dep,as_o_S)
 
.tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
        $(call cmd,kallsyms)
 
# .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
.tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
        $(call if_changed_rule,ksym_ld)
 
.tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
        $(call if_changed,vmlinux__)
 
.tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
        $(call if_changed,vmlinux__)
 
# Needs to visit scripts/ before $(KALLSYMS) can be used.
$(KALLSYMS): scripts ;
 
# Generate some data for debugging strange kallsyms problems
debug_kallsyms: .tmp_map$(last_kallsyms)
 
.tmp_map%: .tmp_vmlinux% FORCE
        ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
 
.tmp_map3: .tmp_map2
 
.tmp_map2: .tmp_map1
 
endif # ifdef CONFIG_KALLSYMS
 
# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
# relevant sections renamed as per the linker script.
quiet_cmd_vmlinux-modpost = LD      $@
      cmd_vmlinux-modpost = $(LD) $(LDFLAGS) -r -o $@                          \
         $(vmlinux-init) --start-group $(vmlinux-main) --end-group             \
         $(filter-out $(vmlinux-init) $(vmlinux-main) $(vmlinux-lds) FORCE ,$^)
define rule_vmlinux-modpost
        :
        +$(call cmd,vmlinux-modpost)
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@
        $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd
endef
 
# vmlinux image - including updated kernel symbols
vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) vmlinux.o FORCE
ifdef CONFIG_HEADERS_CHECK
        $(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
ifdef CONFIG_SAMPLES
        $(Q)$(MAKE) $(build)=samples
endif
        $(call vmlinux-modpost)
        $(call if_changed_rule,vmlinux__)
        $(Q)rm -f .old_version
 
vmlinux.o: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
        $(call if_changed_rule,vmlinux-modpost)
 
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
 
# Handle descending into subdirectories listed in $(vmlinux-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original language
 
PHONY += $(vmlinux-dirs)
$(vmlinux-dirs): prepare scripts
        $(Q)$(MAKE) $(build)=$@
 
# Build the kernel release string
#
# The KERNELRELEASE value built here is stored in the file
# include/config/kernel.release, and is used when executing several
# make targets, such as "make install" or "make modules_install."
#
# The eventual kernel release string consists of the following fields,
# shown in a hierarchical format to show how smaller parts are concatenated
# to form the larger and final value, with values coming from places like
# the Makefile, kernel config options, make command line options and/or
# SCM tag information.
#
#       $(KERNELVERSION)
#         $(VERSION)                    eg, 2
#         $(PATCHLEVEL)                 eg, 6
#         $(SUBLEVEL)                   eg, 18
#         $(EXTRAVERSION)               eg, -rc6
#       $(localver-full)
#         $(localver)
#           localversion*               (files without backups, containing '~')
#           $(CONFIG_LOCALVERSION)      (from kernel config setting)
#         $(localver-auto)              (only if CONFIG_LOCALVERSION_AUTO is set)
#           ./scripts/setlocalversion   (SCM tag, if one exists)
#           $(LOCALVERSION)             (from make command line if provided)
#
#  Note how the final $(localver-auto) string is included *only* if the
# kernel config option CONFIG_LOCALVERSION_AUTO is selected.  Also, at the
# moment, only git is supported but other SCMs can edit the script
# scripts/setlocalversion and add the appropriate checks as needed.
 
pattern = ".*/localversion[^~]*"
string  = $(shell cat /dev/null \
           `find $(objtree) $(srctree) -maxdepth 1 -regex $(pattern) | sort -u`)
 
localver = $(subst $(space),, $(string) \
                              $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
 
# If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
# and if the SCM is know a tag from the SCM is appended.
# The appended tag is determined by the SCM used.
#
# Currently, only git is supported.
# Other SCMs can edit scripts/setlocalversion and add the appropriate
# checks as needed.
ifdef CONFIG_LOCALVERSION_AUTO
        _localver-auto = $(shell $(CONFIG_SHELL) \
                          $(srctree)/scripts/setlocalversion $(srctree))
        localver-auto  = $(LOCALVERSION)$(_localver-auto)
endif
 
localver-full = $(localver)$(localver-auto)
 
# Store (new) KERNELRELASE string in include/config/kernel.release
kernelrelease = $(KERNELVERSION)$(localver-full)
include/config/kernel.release: include/config/auto.conf FORCE
        $(Q)rm -f $@
        $(Q)echo $(kernelrelease) > $@
 
 
# Things we need to do before we recursively start building the kernel
# or the modules are listed in "prepare".
# A multi level approach is used. prepareN is processed before prepareN-1.
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
 
# Listed in dependency order
PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 
# prepare3 is used to check if we are building in a separate output directory,
# and if so do:
# 1) Check that make has not been executed in the kernel src $(srctree)
# 2) Create the include2 directory, used for the second asm symlink
prepare3: include/config/kernel.release
ifneq ($(KBUILD_SRC),)
        @echo '  Using $(srctree) as source for kernel'
        $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
                echo "  $(srctree) is not clean, please run 'make mrproper'";\
                echo "  in the '$(srctree)' directory.";\
                /bin/false; \
        fi;
        $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
        $(Q)ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm
endif
 
# prepare2 creates a makefile if using a separate output directory
prepare2: prepare3 outputmakefile
 
prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
                   include/asm include/config/auto.conf
        $(cmd_crmodverdir)
 
archprepare: prepare1 scripts_basic
 
prepare0: archprepare FORCE
        $(Q)$(MAKE) $(build)=.
        $(Q)$(MAKE) $(build)=. missing-syscalls
 
# All the preparing..
prepare: prepare0
 
# Leave this as default for preprocessing vmlinux.lds.S, which is now
# done in arch/$(ARCH)/kernel/Makefile
 
export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
 
# The asm symlink changes when $(ARCH) changes.
# Detect this and ask user to run make mrproper
 
include/asm: FORCE
        $(Q)set -e; asmlink=`readlink include/asm | cut -d '-' -f 2`;   \
        if [ -L include/asm ]; then                                     \
                if [ "$$asmlink" != "$(SRCARCH)" ]; then                \
                        echo "ERROR: the symlink $@ points to asm-$$asmlink but asm-$(SRCARCH) was expected"; \
                        echo "       set ARCH or save .config and run 'make mrproper' to fix it";             \
                        exit 1;                                         \
                fi;                                                     \
        else                                                            \
                echo '  SYMLINK $@ -> include/asm-$(SRCARCH)';          \
                if [ ! -d include ]; then                               \
                        mkdir -p include;                               \
                fi;                                                     \
                ln -fsn asm-$(SRCARCH) $@;                              \
        fi
 
# Generate some files
# ---------------------------------------------------------------------------
 
# KERNELRELEASE can change from a few different places, meaning version.h
# needs to be updated, so this check is forced on all builds
 
uts_len := 64
define filechk_utsrelease.h
        if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
          echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2;    \
          exit 1;                                                         \
        fi;                                                               \
        (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
endef
 
define filechk_version.h
        (echo \#define LINUX_VERSION_CODE $(shell                             \
        expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL));     \
        echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
endef
 
include/linux/version.h: $(srctree)/Makefile FORCE
        $(call filechk,version.h)
 
include/linux/utsrelease.h: include/config/kernel.release FORCE
        $(call filechk,utsrelease.h)
 
# ---------------------------------------------------------------------------
 
PHONY += depend dep
depend dep:
        @echo '*** Warning: make $@ is unnecessary now.'
 
# ---------------------------------------------------------------------------
# Kernel headers
INSTALL_HDR_PATH=$(objtree)/usr
export INSTALL_HDR_PATH
 
HDRFILTER=generic i386 x86_64
HDRARCHES=$(filter-out $(HDRFILTER),$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))
 
PHONY += headers_install_all
headers_install_all: include/linux/version.h scripts_basic FORCE
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
        $(Q)for arch in $(HDRARCHES); do \
         $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\
         done
 
PHONY += headers_install
headers_install: include/linux/version.h scripts_basic FORCE
        @if [ ! -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
          echo '*** Error: Headers not exportable for this architecture ($(SRCARCH))'; \
          exit 1 ; fi
        $(Q)$(MAKE) $(build)=scripts scripts/unifdef
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include
 
PHONY += headers_check_all
headers_check_all: headers_install_all
        $(Q)for arch in $(HDRARCHES); do \
         $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch HDRCHECK=1 ;\
         done
 
PHONY += headers_check
headers_check: headers_install
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.headersinst ARCH=$(SRCARCH) obj=include HDRCHECK=1
 
# ---------------------------------------------------------------------------
# Modules
 
ifdef CONFIG_MODULES
 
# By default, build modules as well
 
all: modules
 
#       Build modules
 
PHONY += modules
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
        @echo '  Building modules, stage 2.';
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
 
# Target to prepare building external modules
PHONY += modules_prepare
modules_prepare: prepare scripts
 
# Target to install modules
PHONY += modules_install
modules_install: _modinst_ _modinst_post
 
PHONY += _modinst_
_modinst_:
        @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
                echo "Warning: you may need to install module-init-tools"; \
                echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
                sleep 1; \
        fi
        @rm -rf $(MODLIB)/kernel
        @rm -f $(MODLIB)/source
        @mkdir -p $(MODLIB)/kernel
        @ln -s $(srctree) $(MODLIB)/source
        @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                rm -f $(MODLIB)/build ; \
                ln -s $(objtree) $(MODLIB)/build ; \
        fi
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
# This depmod is only for convenience to give the initial
# boot a modules.dep even before / is mounted read-write.  However the
# boot script depmod is the master version.
PHONY += _modinst_post
_modinst_post: _modinst_
        $(call cmd,depmod)
 
else # CONFIG_MODULES
 
# Modules not configured
# ---------------------------------------------------------------------------
 
modules modules_install: FORCE
        @echo
        @echo "The present kernel configuration has modules disabled."
        @echo "Type 'make config' and enable loadable module support."
        @echo "Then build a kernel with module support enabled."
        @echo
        @exit 1
 
endif # CONFIG_MODULES
 
###
# Cleaning is done on three levels.
# make clean     Delete most generated files
#                Leave enough to build external modules
# make mrproper  Delete the current configuration, and all generated files
# make distclean Remove editor backup files, patch leftover files and the like
 
# Directories & files removed with 'make clean'
CLEAN_DIRS  += $(MODVERDIR)
CLEAN_FILES +=  vmlinux System.map \
                .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS  += include/config include2 usr/include
MRPROPER_FILES += .config .config.old include/asm .version .old_version \
                  include/linux/autoconf.h include/linux/version.h      \
                  include/linux/utsrelease.h                            \
                  Module.symvers tags TAGS cscope*
 
# clean - Delete most, but leave enough to build external modules
#
clean: rm-dirs  := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
clean-dirs      := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
 
PHONY += $(clean-dirs) clean archclean
$(clean-dirs):
        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 
clean: archclean $(clean-dirs)
        $(call cmd,rmdirs)
        $(call cmd,rmfiles)
        @find . $(RCS_FIND_IGNORE) \
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
                -o -name '*.symtypes' \) \
                -type f -print | xargs rm -f
 
# mrproper - Delete all generated files, including .config
#
mrproper: rm-dirs  := $(wildcard $(MRPROPER_DIRS))
mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
mrproper-dirs      := $(addprefix _mrproper_,Documentation/DocBook scripts)
 
PHONY += $(mrproper-dirs) mrproper archmrproper
$(mrproper-dirs):
        $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
 
mrproper: clean archmrproper $(mrproper-dirs)
        $(call cmd,rmdirs)
        $(call cmd,rmfiles)
 
# distclean
#
PHONY += distclean
 
distclean: mrproper
        @find $(srctree) $(RCS_FIND_IGNORE) \
                \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
                -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
                -o -name '.*.rej' -o -size 0 \
                -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
                -type f -print | xargs rm -f
 
 
# Packaging of the kernel to various formats
# ---------------------------------------------------------------------------
# rpm target kept for backward compatibility
package-dir     := $(srctree)/scripts/package
 
%pkg: include/config/kernel.release FORCE
        $(Q)$(MAKE) $(build)=$(package-dir) $@
rpm: include/config/kernel.release FORCE
        $(Q)$(MAKE) $(build)=$(package-dir) $@
 
 
# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------
 
boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
boards := $(notdir $(boards))
 
help:
        @echo  'Cleaning targets:'
        @echo  '  clean           - Remove most generated files but keep the config and'
        @echo  '                    enough build support to build external modules'
        @echo  '  mrproper        - Remove all generated files + config + various backup files'
        @echo  '  distclean       - mrproper + remove editor backup and patch files'
        @echo  ''
        @echo  'Configuration targets:'
        @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
        @echo  ''
        @echo  'Other generic targets:'
        @echo  '  all             - Build all targets marked with [*]'
        @echo  '* vmlinux         - Build the bare kernel'
        @echo  '* modules         - Build all modules'
        @echo  '  modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
        @echo  '  dir/            - Build all files in dir and below'
        @echo  '  dir/file.[ois]  - Build specified target only'
        @echo  '  dir/file.ko     - Build module including final link'
        @echo  '  rpm             - Build a kernel as an RPM package'
        @echo  '  tags/TAGS       - Generate tags file for editors'
        @echo  '  cscope          - Generate cscope index'
        @echo  '  kernelrelease   - Output the release version string'
        @echo  '  kernelversion   - Output the version stored in Makefile'
        @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
         echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
         echo  '                    (default: $(INSTALL_HDR_PATH))'; \
         fi
        @echo  ''
        @echo  'Static analysers'
        @echo  '  checkstack      - Generate a list of stack hogs'
        @echo  '  namespacecheck  - Name space analysis on compiled kernel'
        @echo  '  export_report   - List the usages of all exported symbols'
        @if [ -r $(srctree)/include/asm-$(SRCARCH)/Kbuild ]; then \
         echo  '  headers_check   - Sanity check on exported headers'; \
         fi
        @echo  ''
        @echo  'Kernel packaging:'
        @$(MAKE) $(build)=$(package-dir) help
        @echo  ''
        @echo  'Documentation targets:'
        @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
        @echo  ''
        @echo  'Architecture specific targets ($(ARCH)):'
        @$(if $(archhelp),$(archhelp),\
                echo '  No architecture specific help defined for $(ARCH)')
        @echo  ''
        @$(if $(boards), \
                $(foreach b, $(boards), \
                printf "  %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
                echo '')
 
        @echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
        @echo  '  make V=2   [targets] 2 => give reason for rebuild of target'
        @echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
        @echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
        @echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
        @echo  ''
        @echo  'Execute "make" or "make all" to build all targets marked with [*] '
        @echo  'For further info see the ./README file'
 
 
# Documentation targets
# ---------------------------------------------------------------------------
%docs: scripts_basic FORCE
        $(Q)$(MAKE) $(build)=Documentation/DocBook $@
 
else # KBUILD_EXTMOD
 
###
# External module support.
# When building external modules the kernel used as basis is considered
# read-only, and no consistency checks are made and the make
# system is not used on the basis kernel. If updates are required
# in the basis kernel ordinary make commands (without M=...) must
# be used.
#
# The following are the only valid targets when building external
# modules.
# make M=dir clean     Delete all automatically generated files
# make M=dir modules   Make all modules in specified dir
# make M=dir           Same as 'make M=dir modules'
# make M=dir modules_install
#                      Install the modules built in the module directory
#                      Assumes install directory is already created
 
# We are always building modules
KBUILD_MODULES := 1
PHONY += crmodverdir
crmodverdir:
        $(cmd_crmodverdir)
 
PHONY += $(objtree)/Module.symvers
$(objtree)/Module.symvers:
        @test -e $(objtree)/Module.symvers || ( \
        echo; \
        echo "  WARNING: Symbol version dump $(objtree)/Module.symvers"; \
        echo "           is missing; modules will have no dependencies and modversions."; \
        echo )
 
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
PHONY += $(module-dirs) modules
$(module-dirs): crmodverdir $(objtree)/Module.symvers
        $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
 
modules: $(module-dirs)
        @echo '  Building modules, stage 2.';
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
PHONY += modules_install
modules_install: _emodinst_ _emodinst_post
 
install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
PHONY += _emodinst_
_emodinst_:
        $(Q)mkdir -p $(MODLIB)/$(install-dir)
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
 
PHONY += _emodinst_post
_emodinst_post: _emodinst_
        $(call cmd,depmod)
 
clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
 
PHONY += $(clean-dirs) clean
$(clean-dirs):
        $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
 
clean:  rm-dirs := $(MODVERDIR)
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
clean: $(clean-dirs)
        $(call cmd,rmdirs)
        $(call cmd,rmfiles)
        @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
                \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
                -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
                -type f -print | xargs rm -f
 
help:
        @echo  '  Building external modules.'
        @echo  '  Syntax: make -C path/to/kernel/src M=$$PWD target'
        @echo  ''
        @echo  '  modules         - default target, build the module(s)'
        @echo  '  modules_install - install the module'
        @echo  '  clean           - remove generated files in module directory only'
        @echo  ''
 
# Dummies...
PHONY += prepare scripts
prepare: ;
scripts: ;
endif # KBUILD_EXTMOD
 
# Generate tags for editors
# ---------------------------------------------------------------------------
 
#We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
#(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
#Adding $(srctree) adds about 20M on i386 to the size of the output file!
 
ifeq ($(src),$(obj))
__srctree =
else
__srctree = $(srctree)/
endif
 
ifeq ($(ALLSOURCE_ARCHS),)
ifeq ($(ARCH),um)
ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
else
ALLINCLUDE_ARCHS := $(SRCARCH)
endif
else
#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.
ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
endif
 
ALLSOURCE_ARCHS := $(SRCARCH)
 
define find-sources
        ( for arch in $(ALLSOURCE_ARCHS) ; do \
               find $(__srctree)arch/$${arch} $(RCS_FIND_IGNORE) \
                    -name $1 -print; \
          done ; \
          find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
               -name $1 -print; \
          find $(__srctree)include $(RCS_FIND_IGNORE) \
               \( -name config -o -name 'asm-*' \) -prune \
               -o -name $1 -print; \
          for arch in $(ALLINCLUDE_ARCHS) ; do \
               find $(__srctree)include/asm-$${arch} $(RCS_FIND_IGNORE) \
                    -name $1 -print; \
          done ; \
          find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
               -name $1 -print; \
          find $(__srctree) $(RCS_FIND_IGNORE) \
               \( -name include -o -name arch -o -name '.tmp_*' \) -prune -o \
               -name $1 -print; \
          )
endef
 
define all-sources
        $(call find-sources,'*.[chS]')
endef
define all-kconfigs
        $(call find-sources,'Kconfig*')
endef
define all-defconfigs
        $(call find-sources,'defconfig')
endef
 
define xtags
        if $1 --version 2>&1 | grep -iq exuberant; then \
            $(all-sources) | xargs $1 -a \
                -I __initdata,__exitdata,__acquires,__releases \
                -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
                --extra=+f --c-kinds=+px \
                --regex-asm='/^ENTRY\(([^)]*)\).*/\1/'; \
            $(all-kconfigs) | xargs $1 -a \
                --langdef=kconfig \
                --language-force=kconfig \
                --regex-kconfig='/^[[:blank:]]*config[[:blank:]]+([[:alnum:]_]+)/\1/'; \
            $(all-defconfigs) | xargs -r $1 -a \
                --langdef=dotconfig \
                --language-force=dotconfig \
                --regex-dotconfig='/^#?[[:blank:]]*(CONFIG_[[:alnum:]_]+)/\1/'; \
        elif $1 --version 2>&1 | grep -iq emacs; then \
            $(all-sources) | xargs $1 -a; \
            $(all-kconfigs) | xargs $1 -a \
                --regex='/^[ \t]*config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
            $(all-defconfigs) | xargs -r $1 -a \
                --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
        else \
            $(all-sources) | xargs $1 -a; \
        fi
endef
 
quiet_cmd_cscope-file = FILELST cscope.files
      cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
 
quiet_cmd_cscope = MAKE    cscope.out
      cmd_cscope = cscope -b
 
cscope: FORCE
        $(call cmd,cscope-file)
        $(call cmd,cscope)
 
quiet_cmd_TAGS = MAKE   $@
define cmd_TAGS
        rm -f $@; \
        $(call xtags,etags)
endef
 
TAGS: FORCE
        $(call cmd,TAGS)
 
quiet_cmd_tags = MAKE   $@
define cmd_tags
        rm -f $@; \
        $(call xtags,ctags)
endef
 
tags: FORCE
        $(call cmd,tags)
 
 
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------
 
includecheck:
        find * $(RCS_FIND_IGNORE) \
                -name '*.[hcS]' -type f -print | sort \
                | xargs $(PERL) -w scripts/checkincludes.pl
 
versioncheck:
        find * $(RCS_FIND_IGNORE) \
                -name '*.[hcS]' -type f -print | sort \
                | xargs $(PERL) -w scripts/checkversion.pl
 
namespacecheck:
        $(PERL) $(srctree)/scripts/namespace.pl
 
export_report:
        $(PERL) $(srctree)/scripts/export_report.pl
 
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)
 
PHONY += checkstack kernelrelease kernelversion
 
# UML needs a little special treatment here.  It wants to use the host
# toolchain, so needs $(SUBARCH) passed to checkstack.pl.  Everyone
# else wants $(ARCH), including people doing cross-builds, which means
# that $(SUBARCH) doesn't work here.
ifeq ($(ARCH), um)
CHECKSTACK_ARCH := $(SUBARCH)
else
CHECKSTACK_ARCH := $(ARCH)
endif
checkstack:
        $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
        $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH)
 
kernelrelease:
        $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
        $(error kernelrelease not valid - run 'make prepare' to update it))
kernelversion:
        @echo $(KERNELVERSION)
 
# Single targets
# ---------------------------------------------------------------------------
# Single targets are compatible with:
# - build whith mixed source and output
# - build with separate output dir 'make O=...'
# - external modules
#
#  target-dir => where to store outputfile
#  build-dir  => directory in kernel source tree to use
 
ifeq ($(KBUILD_EXTMOD),)
        build-dir  = $(patsubst %/,%,$(dir $@))
        target-dir = $(dir $@)
else
        zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
        build-dir  = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
        target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
endif
 
%.s: %.c prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.i: %.c prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.c prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.lst: %.c prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.s: %.S prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.S prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.symtypes: %.c prepare scripts FORCE
        $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
 
# Modules
/ %/: prepare scripts FORCE
        $(cmd_crmodverdir)
        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
        $(build)=$(build-dir)
%.ko: prepare scripts FORCE
        $(cmd_crmodverdir)
        $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
        $(build)=$(build-dir) $(@:.ko=.o)
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
 
# FIXME Should go into a make.lib or something
# ===========================================================================
 
quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN   $(wildcard $(rm-dirs)))
      cmd_rmdirs = rm -rf $(rm-dirs)
 
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN   $(wildcard $(rm-files)))
      cmd_rmfiles = rm -f $(rm-files)
 
# Run depmod only is we have System.map and depmod is executable
# and we build for the host arch
quiet_cmd_depmod = DEPMOD  $(KERNELRELEASE)
      cmd_depmod = \
        if [ -r System.map -a -x $(DEPMOD) ]; then                              \
                $(DEPMOD) -ae -F System.map                                     \
                $(if $(strip $(INSTALL_MOD_PATH)), -b $(INSTALL_MOD_PATH) -r)   \
                $(KERNELRELEASE);                                               \
        fi
 
# Create temporary dir for module support files
# clean it up only when building all modules
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
                  $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
 
a_flags = -Wp,-MD,$(depfile) $(KBUILD_AFLAGS) $(AFLAGS_KERNEL) \
          $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
          $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
 
quiet_cmd_as_o_S = AS      $@
cmd_as_o_S       = $(CC) $(a_flags) -c -o $@ $<
 
# read all saved command lines
 
targets := $(wildcard $(sort $(targets)))
cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
 
ifneq ($(cmd_files),)
  $(cmd_files): ;       # Do not try to update included dependency files
  include $(cmd_files)
endif
 
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
# Usage:
# $(Q)$(MAKE) $(clean)=dir
clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
 
endif   # skip-makefile
 
PHONY += FORCE
FORCE:
 
# Declare the contents of the .PHONY variable as phony.  We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)
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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [Makefile] - Blame information for rev 3

Line No.	Rev	Author	Line
1	3	xianfeng	`VERSION = 2`
2			`PATCHLEVEL = 6`
3			`SUBLEVEL = 24`
4			`EXTRAVERSION =`
5			`NAME = 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 avoids hard-to-debug behaviour);`
16			`# o print "Entering directory ...";`
17			`MAKEFLAGS += -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
38			`ifdef V`
39			`ifeq ("$(origin V)", "command line")`
40			`KBUILD_VERBOSE = $(V)`