kbuild: trivial fixes in Makefile

#

# 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 wil be printed at all, since

# 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

include  $(srctree)/scripts/Kbuild.include

# Do not use make's built-in rules and variables

# This increases performance and avoid hard-to-debug behaviour

# This increases performance and avoid hard-to-debug behavour

MAKEFLAGS += -rR

# Make variables (CC, etc...)

KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)

KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)

export	VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \

	ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \

	CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \

	HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS

export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION

export ARCH 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 CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS

export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE

ifeq ($(KBUILD_EXTMOD),)

# Additional helpers built in scripts/

# Carefully list dependencies so we do not try to build scripts twice

# in parrallel

# in parallel

PHONY += scripts

scripts: scripts_basic include/config/auto.conf

	$(Q)$(MAKE) $(build)=$(@)

# 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 probarly in a cleaned tree so

# 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

ifeq ($(KBUILD_EXTMOD),)

# 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 overriden in the arch makefile

# Defaults vmlinux but it is usually overridden in the arch makefile

all: vmlinux

ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE

# warn about C99 declaration after statement

CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)

# disable pointer signedness warnings in gcc 4.0

# disable pointer signed / unsigned warnings in gcc 4.0

CFLAGS += $(call cc-option,-Wno-pointer-sign,)

# Default kernel image to build when no specific target is given.

#

# 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 arguement can be passed to make if needed.

# makefile but the argument can be passed to make if needed.

#

MODLIB	= $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)

# Build vmlinux

# ---------------------------------------------------------------------------

# vmlinux is build from the objects selected by $(vmlinux-init) and

# 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.

# 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 determinded by the SCM used.

# The appended tag is determined by the SCM used.

#

# Currently, only git is supported.

# Other SCMs can edit scripts/setlocalversion and add the appropriate

# 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 build in the module directory

#                      Install the modules built in the module directory

#                      Assumes install directory is already created

# We are always building modules

ALLINCLUDE_ARCHS := $(ARCH)

endif

else

#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour.

#Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.

ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)

endif