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

_flavor=vserver
pkgname=linux-${_flavor}
pkgver=3.10.23
pkgrel=0
_vsver=vs2.3.6.8

if [ "${pkgver##*.*.*}" = "$pkgver" ]; then
	_kernver=$pkgver
else
	_kernver=${pkgver%.*}
fi

pkgdesc="Linux kernel with vserver"
url="http://linux-vserver.org/"
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash bc"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://www.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	http://www.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz
	patch-$pkgver-$_vsver.diff
	aslr-pie.patch
	kernelconfig.x86
	kernelconfig.x86_64
	"
subpackages="$pkgname-dev"
arch="all"
license="GPL-2"

_abi_release=${pkgver}-${_vsver}

prepare() {
	cd "$srcdir"/linux-$_kernver
	if [ "${pkgver%.0}" = "$pkgver" ]; then
		msg "Applying $i"
		unxz -c < ../patch-$pkgver.xz | patch -p1 -N || return 1
	fi

	# ERR is no valid signal
	sed -i -e '/^trap/s/ERR//' scripts/link-vmlinux.sh

	# first apply patches in specified order
	for i in $source; do
		i=${i##*/}
		case $i in
		*.patch|*.diff)
			msg "Applying $i..."
			patch -s -p1 -i "$srcdir"/$i || return 1
			;;
		esac
	done

	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 "$srcdir"/build
	make menuconfig
	cp .config "$startdir"/$_config || return 1
}

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

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

	rm -rf "$pkgdir"/lib/modules/*/build \
		"$pkgdir"/lib/modules/*/source
	rm -rf "$pkgdir"/lib/firmware

	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
}

md5sums="4f25cd5bec5f8d5a7d935b3f2ccb8481  linux-3.10.tar.xz
8b9650e10f8beee769545b51202766a5  patch-3.10.23.xz
5cf351f296b0343a244cbfb11b6620f8  patch-3.10.23-vs2.3.6.8.diff
35e2e5c7a5f0de3cdf540bb4ae894349  aslr-pie.patch
7f62c6c40c9638d83d4fa11eace3f9ac  kernelconfig.x86
aa2ac10901c87db6a4a70ed3d8cc49a8  kernelconfig.x86_64"
sha256sums="df27fa92d27a9c410bfe6c4a89f141638500d7eadcca5cce578954efc2ad3544  linux-3.10.tar.xz
bdf3983ff3e26c5781edb19a8d0d7765e2e0282cfabda2b0652cc0deff53f445  patch-3.10.23.xz
48abc596ffbca06766ac308743c5882d1666c9fa7e6b96e349cc73eb1f75e000  patch-3.10.23-vs2.3.6.8.diff
c18b47c7cd07837ca1c4f4702ef72e688a307b02f1f74012b329cea7d910ec85  aslr-pie.patch
1c06446173692d14e7db21b873e6b9053770ed1290a0e199e575dfebd2781072  kernelconfig.x86
ed941323278a48033f96cdfd4e66a25cb26171b31cbc96583817f7291d47f721  kernelconfig.x86_64"
sha512sums="5fb109fcbd59bf3dffc911b853894f0a84afa75151368f783a1252c5ff60c7a1504de216c0012be446df983e2dea400ad8eeed3ce04f24dc61d0ef76c174dc35  linux-3.10.tar.xz
0fdb65f1c45e490e1f2206589273e4b8f0f142ab6b16341cb52977e0c6a983b359f01456a9cae3e1c139d5ead5de106c10909b7fdb6a156675cad5d39374e97f  patch-3.10.23.xz
01ec1135de900f898fd8aa61d6d3475a64bcd1dfdbcda6747cd5132b7bb12f195331995ae52e718108ef118e6bd1a50984f861a6318346317ad6401117beff2a  patch-3.10.23-vs2.3.6.8.diff
41c74619359791a65dc2c017e8fdae9e8614c8c6d3306bec59dac84bc74455ea1b9c5d35d98c7ce414d8621d91c9dbe868916a8b89be6c60d1013235ef5c21ab  aslr-pie.patch
4612728f2f6b3d9ac043606511c2f6147f98aa716d16c8633776b83d1b98d997277e650cab537e2f87c1225541294f51302598cd5e543a353d768bbc68e91ab4  kernelconfig.x86
a3d9e72659f6a53b4bc47350fbf427263c2cc8320ef61e64f22a7402c4ba16d8ae2a3df5057ab09431d4b8a4e2c2a41b86d188b89d830c7301c6943360e83954  kernelconfig.x86_64"