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# Maintainer: Natanael Copa <ncopa@alpinelinux.org>

_flavor=scst
pkgname=linux-${_flavor}
pkgver=2.6.35.9
_kernver=2.6.35
pkgrel=0
pkgdesc="Linux kernel optimised for scst"
url="http://scst.sourceforge.net"
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
_scst_svn="3161"
source="ftp://ftp.kernel.org/pub/linux/kernel/v2.6/linux-$_kernver.tar.bz2
	ftp://ftp.kernel.org/pub/linux/kernel/v2.6/patch-$pkgver.bz2
	0004-arp-flush-arp-cache-on-device-change.patch
	r8169-fix-rx-checksum-offload.patch
	r8169-add-gro-support.patch
	setlocalversion.patch
	kernelconfig.x86_64
	unionfs-2.5.7_for_2.6.35.8.patch
	scst-2.6.35-svn-3161.patch
	"
subpackages="$pkgname-dev linux-firmware:firmware"
arch="x86_64"
license="GPL-2"

_abi_release=${pkgver}-${_flavor}

prepare() {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if [ "$_kernver" != "$pkgver" ]; then
		bunzip2 -c < ../patch-$pkgver.bz2 | patch -p1 -N || return 1
	fi

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi

	echo "-scst" > "$srcdir"/linux-$_kernver/localversion-scst
	
	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config || return 1
	make -C "$srcdir"/linux-$_kernver O="$srcdir"/build HOSTCC="${CC:-gcc}" \
		silentoldconfig
}

# this is so we can do: 'abuild menuconfig' to reconfigure kernel
menuconfig() {
	cd "$srcdir"/build || return 1
	make menuconfig
	cp .config "$startdir"/$_config
}

build() {
	cd "$srcdir"/build
	make CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		|| return 1
}

package() {
	cd "$srcdir"/build
	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules
	make -j1 modules_install firmware_install install \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_PATH="$pkgdir"/boot \
		|| return 1

	rm -f "$pkgdir"/lib/modules/${_abi_release}/build \
		"$pkgdir"/lib/modules/${_abi_release}/source
	install -D include/config/kernel.release \
		"$pkgdir"/usr/share/kernel/$_flavor/kernel.release
}

dev() {
	# copy the only the parts that we really need for build 3rd party
	# kernel modules and install those as /usr/src/linux-headers,
	# simlar to what ubuntu does
	#
	# this way you dont need to install the 300-400 kernel sources to
	# build a tiny kernel module
	#
	pkgdesc="Headers and script for third party modules for grsec kernel"
	local dir="$subpkgdir"/usr/src/linux-headers-${_abi_release}

	# first we import config, run prepare to set up for building
	# external modules, and create the scripts
	mkdir -p "$dir"
	cp "$srcdir"/$_config "$dir"/.config
	make -j1 -C "$srcdir"/linux-$_kernver O="$dir" HOSTCC="${CC:-gcc}" \
		silentoldconfig prepare scripts

	# remove the stuff that poits to real sources. we want 3rd party
	# modules to believe this is the soruces
	rm "$dir"/Makefile "$dir"/source

	# copy the needed stuff from real sources
	#
	# this is taken from ubuntu kernel build script
	# http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=blob;f=debian/rules.d/3-binary-indep.mk;hb=HEAD
	cd "$srcdir"/linux-$_kernver
	find . -path './include/*' -prune -o -path './scripts/*' -prune \
		-o -type f \( -name 'Makefile*' -o -name 'Kconfig*' \
		-o -name 'Kbuild*' -o -name '*.sh' -o -name '*.pl' \
		-o -name '*.lds' \) | cpio -pdm "$dir"
	cp -a drivers/media/dvb/dvb-core/*.h "$dir"/drivers/media/dvb/dvb-core
	cp -a drivers/media/video/*.h "$dir"/drivers/media/video
	cp -a drivers/media/dvb/frontends/*.h "$dir"/drivers/media/dvb/frontends
	cp -a scripts include "$dir"
	find $(find arch -name include -type d -print) -type f \
		| cpio -pdm "$dir"

	install -Dm644 "$srcdir"/build/Module.symvers \
		"$dir"/Module.symvers

	mkdir -p "$subpkgdir"/lib/modules/${_abi_release}
	ln -sf /usr/src/linux-headers-${_abi_release} \
		"$subpkgdir"/lib/modules/${_abi_release}/build
}

firmware() {
	pkgdesc="Firmware for linux kernel"
	replaces="linux-grsec linux-vserver"
	mkdir -p "$subpkgdir"/lib
	mv "$pkgdir"/lib/firmware "$subpkgdir"/lib/
}

md5sums="091abeb4684ce03d1d936851618687b6  linux-2.6.35.tar.bz2
eca407cf4872ad77ae23adc8242389c4  patch-2.6.35.9.bz2
776adeeb5272093574f8836c5037dd7d  0004-arp-flush-arp-cache-on-device-change.patch
0ccecafd4123dcad0b0cd7787553d734  r8169-fix-rx-checksum-offload.patch
139b39da44ecb577275be53d7d365949  r8169-add-gro-support.patch
8c224ba0cdf0aa572c7eb50379435be4  setlocalversion.patch
8b50f527b834f693e9cfbcabf29b04f3  kernelconfig.x86_64
e4185c1bb1d88594c67eb154d0c06692  unionfs-2.5.7_for_2.6.35.8.patch
f8aa57373ab14ece95ecdaa15840fa25  scst-2.6.35-svn-3161.patch"