# --- ROCK-COPYRIGHT-NOTE-BEGIN ---
#
# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
# Please add additional copyright information _after_ the line containing
# the ROCK-COPYRIGHT-NOTE-END tag. Otherwise it might get removed by
# the ./scripts/Create-CopyPatch script. Do not edit this copyright text!
#
# ROCK Linux: rock-src/package/base/linux/linux.conf
# ROCK Linux is Copyright (C) 1998 - 2004 Clifford Wolf
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version. A copy of the GNU General Public
# License can be found at Documentation/COPYING.
#
# Many people helped and are helping developing ROCK Linux. Please
# have a look at http://www.rocklinux.org/ and the Documentation/TEAM
# file for details.
#
# --- ROCK-COPYRIGHT-NOTE-END ---

pkg_linux_mode=image
pkg_linux_cross=""

case "$xpkg-" in
	*-header-*) pkg_linux_mode=header ;;
	*-source-*) pkg_linux_mode=source ;;
esac

echo_status "Preparing to build a linux kernel $pkg_linux_mode package."

case "$xpkg" in
	*-cross-*)
		pkg_linux_cross="${xpkg#**-cross-}"
		if [ $pkg_linux_mode = header ]; then
			echo_status "Preparing to build a linux kernel $pkg_linux_cross cross-headers package."
		else
			echo_error "Building linux kernel cross packages isn't supported yet."
			exit 1
		fi
		;;
esac


treever=${xpkg/linux/}
treever=${treever/-*/}

[ "$vanilla_ver" ] || vanilla_ver="$ver"
srctar="linux-${vanilla_ver}.tar.bz2"

lx_extraversion=""
lx_kernelrelease=""

if [ -z "$pkg_linux_cross" ]
then
	lx_cpu=$( echo "$arch_machine" | \
		sed -e s/x86$/i386/ -e s/powerpc/ppc/    \
		    -e s/hppa/parisc/ -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/ )

	[ $arch = sparc -a "$ROCKCFG_SPARC_64BIT_KERNEL" = 1 ] && \
		lx_cpu=sparc64
else
	lx_cpu=$( echo "$pkg_linux_cross" | \
		sed -e s/x86$/i386/ -e s/powerpc/ppc/    \
		    -e s/hppa/parisc/ -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/ )
fi

MAKE="$MAKE ARCH=$lx_cpu CROSS_COMPILE=$archprefix KCC=$KCC"

# correct the abolute path for patchfiles supplied in the .desc file
for x in $patchfiles ; do
	if [ ! -e "$x" -a -n "${x##*/*}" ] ; then
		var_remove patchfiles " " "$x"
		var_append patchfiles " " "$archdir/$x"
	fi
done

# add kernel specific patchfiles
for x in $confdir/linux$treever/*.patch; do
	var_append patchfiles " " "$x"
done

# add hppa patch if needed
if [[ "$arch" == hppa && "$vanillaver" == 2.6* ]]; then
	var_insert patchfiles " " "$archdir/patch-2.6.*-pa*.bz2"
fi

auto_config ()
{
	if [ -f $base/architecture/$arch/kernel$treever.conf.sh ] ; then
		echo "  using: architecture/$arch/kernel$treever.conf.sh"
		. $base/architecture/$arch/kernel$treever.conf.sh > .config
	elif [ -f $base/architecture/$arch/kernel$treever.conf.m4 ] ; then
		echo "  using: architecture/$arch/kernel$treever.conf.m4"
		m4 -I $base/architecture/$arch -I $base/architecture/share \
		   $base/architecture/$arch/kernel$treever.conf.m4 > .config
	elif [ -f $base/architecture/$arch/kernel$treever.conf ] ; then
		echo "  using: architecture/$arch/kernel$treever.conf"
		cp $base/architecture/$arch/kernel$treever.conf .config
	elif [ -f $base/architecture/$arch/kernel.conf.sh ] ; then
		echo "  using: architecture/$arch/kernel.conf.sh"
		. $base/architecture/$arch/kernel.conf.sh > .config
	elif [ -f $base/architecture/$arch/kernel.conf.m4 ] ; then
		echo "  using: architecture/$arch/kernel.conf.m4"
		m4 -I $base/architecture/$arch -I $base/architecture/share \
		   $base/architecture/$arch/kernel.conf.m4 > .config
	elif [ -f $base/architecture/$arch/kernel.conf ] ; then
		echo "  using: architecture/$arch/kernel.conf"
		cp $base/architecture/$arch/kernel.conf .config
	else
		echo "  using: no rock kernel config found"
		cp arch/$lx_cpu/defconfig .config
	fi

	echo "  merging (system default): 'arch/$lx_cpu/defconfig'"
	grep '^CONF.*=y' arch/$lx_cpu/defconfig | cut -f1 -d= | \
	while read tag ; do egrep -q "(^| )$tag[= ]" .config || echo "$tag=y"
	  done >> .config ; cp .config .config.1

	# all modules needs to be first so modules can be disabled by i.e.
	# the targets later
	echo "Enabling all modules ..."
	yes '' | eval $MAKE no2modconfig > /dev/null ; cp .config .config.2

	if [ -f $base/target/$target/kernel$treever.conf.sh ] ; then
		confscripts="$base/target/$target/kernel$treever.conf.sh $confscripts"
	elif [ -f $base/target/$target/kernel.conf.sh ] ; then
		confscripts="$base/target/$target/kernel.conf.sh $confscripts"
	fi

	for x in $confscripts ; do
		echo "  running: $x"
		sh $x .config
	done
	cp .config .config.3

	# merge various text/plain config files
	for x in $base/config/$config.$swpid/linux.cfg \
		 $base/target/$target/kernel.conf ; do
	   if [ -f $x ] ; then
		echo "  merging: '$x'"
		tag="$(sed '/CONFIG_/ ! d; s,.*CONFIG_\([^ =]*\).*,\1,' \
			$x | tr '\n' '|')"
		egrep -v "\bCONFIG_($tag)\b" < .config > .config.4
		sed 's,\(CONFIG_.*\)=n,# \1 is not set,' \
			$x >> .config.4
		cp .config.4 .config
	   fi
	done

	# create a valid .config
	yes '' | eval $MAKE oldconfig > /dev/null ; cp .config .config.5

	# last disable broken stuff
	rm -f /tmp/$$.sed
	list="CONFIG_THIS_DOES_NOT_EXIST"
	for x in $pkg_linux_brokenfiles ; do
	    if [ -f "$x" ] ; then
		echo "Disable broken file: $x"
		list="$list `tr ' ' '\t' < $x | cut -f1 | grep '^CONFIG_'`"
	    fi
	done
	for x in $list ; do
		echo "s,^$x=.\$,# $x is not set,;" >> /tmp/$$.sed
	done

	sed -f /tmp/$$.sed < .config > .config.6
	cp .config.6 .config ; rm -f /tmp/$$.sed

	# create a valid .config (dependencies might need to be disabled)
	yes '' | eval $MAKE oldconfig > /dev/null

	# save final config
	cp .config .config_modules

	echo "Creating config without modules ...."
	sed "s,\(CONFIG_.*\)=m,# \1 is not set," .config > .config_new
	mv .config_new .config
	# create a valid .config (dependencies might need to be disabled)
	yes '' | eval $MAKE oldconfig > /dev/null
	mv .config .config_nomods

	# which .config to use?
	if [ "$ROCKCFG_PKG_LINUX_CONFIG_STYLE" = "modules" ] ; then
		cp .config_modules .config
	else
		cp .config_nomods .config
	fi
}

lx_grabextraversion () {
	local ev
	ev=$( sed -n -e 's,^[ \t]*EXTRAVERSION[ \t]*=[ \t]*\([^ \t]*\),\1,p' Makefile | tail -n 1 )
	if [ "$ev" ]; then
		lx_extraversion="${lx_extraversion}$ev"
		# keep intact but commented since the second EXTRAVERSION
		# definition, and clean the first.
		sed -e 's,^\([ \t]*EXTRAVERSION[ \t]*=.*\),#\1,g' \
		    -e 's,^#\(EXTRAVERSION =\).*,\1,' \
		    Makefile > Makefile.new
		mv Makefile.new Makefile
	fi
}

lx_injectextraversion () {
	lx_extraversion="${lx_extraversion}-rock"

	# inject final EXTRAVERSION into Makefile
	sed -i -e "s,^\([ \t]*EXTRAVERSION[ \t]*\)=.*,\1= ${lx_extraversion},g" Makefile

	# update version.h - we only do this, because some other freaky
	# projects like rsbac change EXTRAVERSION in other Makefiles ...
	rerun=""; eval $MAKE include/linux/version.h | grep -q "is up to date" && rerun=1
	if [ "$rerun" ] ; then
		echo "WARNING: Your system's timer resolution is too low ..."
		sleep 1 ; touch Makefile
		eval $MAKE include/linux/version.h
	fi

	# get kernel_release
	lx_kernelrelease="$( echo -e "#include <linux/version.h>\nUTS_RELEASE" \
		    > conftest.c &&     \
		    gcc -E -I./include conftest.c | tail -n 1   \
		    | cut -d '"' -f 2 && rm -f conftest.c )"
}

lx_config ()
{
	echo "Generic linux source patching and configuration ..."

	# grab extraversion from vanilla
	lx_grabextraversion

	hook_eval prepatch
	apply_patchfiles "lx_grabextraversion"
	hook_eval postpatch

	echo "Redefining some VERSION flags ..."
	lx_injectextraversion

	if [[ $treever = 24* ]] ; then
		echo "Create symlinks and a few headers for <$lx_cpu> ... "
		eval $MAKE symlinks
		cp $confdir/autoconf.h include/linux/
		touch include/linux/modversions.h
	fi

	if [ "$ROCKCFG_PKG_LINUX_CONFIG_STYLE" = none ] ; then
		echo "Using \$base/config/\$config.$swpid/linux.cfg."
		echo "Since automatic generation is disabled ..."
		cp -v $base/config/$config.$swpid/linux.cfg .config
	else
		echo "Automatically creating default configuration ...."
		auto_config
	fi

	echo "... configuration finished!"

	if [[ $treever != 24* ]] ; then
		echo "Create symlinks and a few headers for <$lx_cpu> ... "
		eval $MAKE include/asm
		yes '' | eval $MAKE oldconfig > /dev/null
	fi

	echo "Clean up the *.orig and *~ files ... "
	rm -f .config.old `find -name '*.orig' -o -name '*~'`

	echo "Generic linux source configuration finished."
}

pkg_linux_brokenfiles="$base/architecture/$arch/kernel-disable.lst \
	$base/architecture/$arch/kernel$treever-disable.lst \
	$confdir/linux$treever/disable-broken.lst $pkg_linux_brokenfiles"

main_lx_src() {
	echo "Extracting the Linux Kernel Sources [$vanilla_ver] ... "
	tar $taropt $archdir/$srctar
	cd linux-$vanilla_ver

	echo "Correcting user and permissions ..."
	chown -R root:root . ; chmod -R u=rwX,go=rX .

	echo "Configuring kernel source ..."
	lx_config

	echo "Copying to $root/usr/src/linux-${lx_kernelrelease} ..."
	cd $root/usr/src
	rm -rf linux-${lx_kernelrelease}
	cp -r $builddir/linux-$vanilla_ver linux-${lx_kernelrelease}

	if [ "${xpkg%-source}" = "$ROCKCFG_PKG_LINUX_HEADERS" ] ; then
		rm -f linux
		ln -svf linux-${lx_kernelrelease} $root/usr/src/linux
	fi

	echo "Copying kernel patches ... "
	rm -rf linux$treever-patches ; mkdir -p linux$treever-patches
	echo "This directory contains all the stuff used by ROCK Linux" > linux$treever-patches/README
	echo "to build the Kernel (in addition to the official Kernel Sources)." >> linux$treever-patches/README
	cp -v $patchfiles linux$treever-patches/

	cd linux-${lx_kernelrelease}

	if [ "$ROCKCFG_PKG_LINUX_CONFIG_STYLE" = none ] ; then
		# create a valid .config (new settings may be available etc.)
		yes '' | eval $MAKE oldconfig > /dev/null
	else
		cp -v .config_nomods  ../linux$treever-patches/config_nomods.txt
		cp -v .config_modules ../linux$treever-patches/config_modules.txt
	fi

	# can fail in stage 0-1 ...
	if [ $stagelevel -gt 1 ] && [[ $treever = 24* ]] ; then
		echo "Creating dependencies (e.g. for versioned symbols) ..."
		eval $MAKE dep-files
	fi
	if [ $stagelevel -gt 1 ] && [[ $treever = 26* ]] ; then
		echo "Creating scripts/* because external modules need it ..."
		make scripts/
	fi

	echo "Clean up the *.orig and *~ files ... "
	find -name '*.orig' -o -name '*~' | xargs rm -f
	rm -f .config.old .config.[1-9]
}

main_lx_header() {
	echo "Extracting the Linux Kernel Sources [$ver] ... "
	tar $taropt $archdir/$srctar
	cd linux-$vanilla_ver

	# patch and configure
	lx_config

	if [ -z "$pkg_linux_cross" ]; then
		incdir="$root/$prefix/include/"
	else
		incdir="$root/$prefix/$pkg_linux_cross-unknown-linux-gnu/include"
	fi

	# install the header files - and do some post-processing for sparc
	rm -rf $incdir/{asm,asm-generic,linux,asm-sparc,asm-sparc64}
	mkdir -p $incdir
	if [ "$lx_cpu" != sparc -a "$lx_cpu" != sparc64 ]
	then
		mkdir -p $incdir/asm
		cp -rv include/asm/* $incdir/asm/
		cp -rv include/{asm-generic,linux} $incdir/
	else
		# we can only generate this files when we have a cross compiler
		# which is stage 1 and above ...
		if [ $stagelevel -gt  0 -a $treever != 26 ] ; then
			# build two generated headers first ...
			make ARCH=sparc CROSS_COMPILE=$archprefix KCC=$KCC \
			  arch/sparc/kernel/Makefile check_asm
			[ $lx_cpu = sparc64 ] && \
				make ARCH=sparc64 CROSS_COMPILE=$archprefix KCC=$KCC \
				  arch/sparc64/kernel/Makefile check_asm
		fi

		cp -rv include/{asm-{sparc{,64},generic},linux} $incdir/
		cp -v $confdir/generate-asm . ; chmod +x ./generate-asm
		./generate-asm $incdir
	fi
}

main_lx() {
	lx_config

	# we need to rerun the oldconfig since the used .config
	# might not match the one used in the last oldconfig run
	# (e.g. the nomods is run last - and normally the module
	# one is used)
	yes '' | eval $MAKE oldconfig > /dev/null

	if [[ $treever = 24* ]] ; then
		echo "Creating dependencies ..."
		eval $MAKE -j 1 dep
	fi

	echo "Cleanup kernel ..."
	eval $MAKE -j 1 clean > /dev/null

	echo "Building the kernel ..."
	[ "$xpkg" = "$ROCKCFG_PKG_LINUX_DEFAULT" ] && default=1
	case "$lx_cpu" in
	    i386)
		eval $MAKE bzImage
		cp -vf arch/i386/boot/bzImage $root/boot/vmlinuz_${lx_kernelrelease}
		[ "$default" ] && \
		  cp -vf arch/i386/boot/bzImage $root/boot/vmlinuz
		;;
	    x86_64)
		eval $MAKE bzImage
		cp -vf arch/x86_64/boot/bzImage $root/boot/vmlinuz_${lx_kernelrelease}
		[ "$default" ] && \
		  cp -vf arch/x86_64/boot/bzImage $root/boot/vmlinuz
		;;
	    alpha)
		eval $MAKE vmlinux
		gzip < vmlinux > $root/boot/vmlinux_${lx_kernelrelease}.gz
		[ "$default" ] && \
		  cp -vf $root/boot/vmlinux_$ver-rock.gz $root/boot/vmlinux.gz
		;;
	    mips)
		eval $MAKE vmlinux
		$BUILDCC arch/mips/boot/elf2ecoff.c -o elf2ecoff
		./elf2ecoff vmlinux vmlinux.ecoff
		cp -vf vmlinux.ecoff $root/boot/vmlinux_${lx_kernelrelease}.ecoff
		[ "$default" ] && \
		  cp -vf vmlinux.ecoff $root/boot/
		;;
	    ppc)
		eval $MAKE vmlinux
		cp -vf vmlinux $root/boot/vmlinux_${lx_kernelrelease}
		[ "$default" ] && \
		  cp -vf vmlinux $root/boot/vmlinux
		eval $MAKE zImage
		for x in arch/ppc/boot/images/zImage.* ; do
		  cp -v $x $root/boot/${x/arch\/ppc\/boot\/images\//}-$ver
		done
		;;
	    sparc)
		if [[ $treever != 24* ]] && [ "$ROCKCFG_SPARC_BITS" = 32 ]] ; then
			eval $MAKE image
		else
			eval $MAKE vmlinux
		fi
		cp -vf vmlinux $root/boot/vmlinux_$ver-rock
		[ "$default" ] && \
		  cp -vf vmlinux $root/boot/vmlinux
		;;
	    um)
		eval $MAKE linux
		cp -vf linux $root/boot/linux_${lx_kernelrelease}
		[ "$default" ] && \
		  cp -vf linux $root/boot/linux
		;;
	    *)
		eval $MAKE vmlinux
		cp -vf vmlinux $root/boot/vmlinux_${lx_kernelrelease}
		[ "$default" ] && \
		  cp -vf vmlinux $root/boot/vmlinux
		;;
	esac
	cp -vf .config $root/boot/kconfig_${lx_kernelrelease}
	cp -vf System.map $root/boot/System.map_${lx_kernelrelease}
	[ "$default" ] && cp -vf System.map $root/boot/System.map

	echo "Building the modules ..."
	eval $MAKE modules
	echo "Installing the modules ..."
	if [ $stagelevel -le 1 ] ; then
		eval $MAKE modules_install \
			INSTALL_MOD_PATH=$root DEPMOD=/bin/true
	else
		eval $MAKE modules_install DEPMOD=/bin/true
		echo "Running 'depmod -a -q -F /boot/System.map ${lx_kernelrelease}' .."
		depmod -a -q -F /boot/System.map_${lx_kernelrelease} ${lx_kernelrelease}
		for x in /lib/modules/${lx_kernelrelease}/modules.*
		do [ -f $x ] && add_flist $x; done
	fi

	# fix /lib/modules/${ver}/build symlink
	rm -f $root/lib/modules/${lx_kernelrelease}/build
	ln -sf ../../../usr/src/linux-${lx_kernelrelease} \
	       $root/lib/modules/${lx_kernelrelease}/build

	if [ "$default" ] ; then
		cp $confdir/mkinitrd.sh $root/sbin/mkinitrd
		chmod +x $root/sbin/mkinitrd

		if [ -z "$root" ]; then
			mkinitrd empty ${lx_kernelrelease}
			rm -f /boot/initrd.img
			ln -s initrd-${lx_kernelrelease}.img /boot/initrd.img
		fi
	fi
}

case "$pkg_linux_mode" in
	source)
		autoextract=0
		createdocs=0
		custmain="main_lx_src"
		;;
	header)
		autoextract=0
		createdocs=0
		custmain="main_lx_header"
		;;
	image)
		custmain="main_lx"
		autopatch=0
		;;
esac