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

_flavor=vanilla
pkgname=linux-${_flavor}
pkgver=3.8.11
_kernver=3.8
pkgrel=0
pkgdesc="Linux kernel with grsecurity"
url=http://grsecurity.net
depends="mkinitfs linux-firmware"
makedepends="perl installkernel bash gmp-dev"
options="!strip"
_config=${config:-kernelconfig.${CARCH}}
install=
source="http://ftp.kernel.org/pub/linux/kernel/v3.x/linux-$_kernver.tar.xz
	kernelconfig.x86
	kernelconfig.x86_64
	dvb-realtek-usbid.patch
	"
if [ "${pkgver%.0}" = "$pkgver" ]; then
	source="$source
	http://ftp.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz"
fi
subpackages="$pkgname-dev"
arch="x86 x86_64"
license="GPL-2"

_abi_release=${pkgver}

prepare() {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if [ "${pkgver%.0}" = "$pkgver" ]; then
		msg "Applying patch-$pkgver.xz"
		unxz -c < "$srcdir"/patch-$pkgver.xz | 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

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

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

	rm -f "$pkgdir"/lib/modules/${_abi_release}/build \
		"$pkgdir"/lib/modules/${_abi_release}/source
	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"
	depends="gmp-dev"
	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 modules_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="1c738edfc54e7c65faeb90c436104e2f  linux-3.8.tar.xz
804e7347e20d854bf9538ff26b48c515  kernelconfig.x86
3dfb2a003533b0af7041b88b91e41ea7  kernelconfig.x86_64
28c7b1608d7663dfa5bbdf0340a5d4f2  dvb-realtek-usbid.patch
76ec67882ad94b8ab43c70a46befca13  patch-3.8.11.xz"
sha256sums="e070d1bdfbded5676a4f374721c63565f1c969466c5a3e214004a136b583184b  linux-3.8.tar.xz
64e0ed001b464110f16920d4958e65d67b9db531adeca99c36c47695292d2c8b  kernelconfig.x86
f27a71d23fb902ededb6008d65c2872a934c0c10641309dd062b23e3787a8087  kernelconfig.x86_64
86cfd48443de1aa9707a78708da6fde4fee52368af5c05081e648f9ca1876f9a  dvb-realtek-usbid.patch
4666f2ca152e454b090525efa79cfcacc81a3d82011e14c412f07edd45457a95  patch-3.8.11.xz"
sha512sums="10a7983391af907d8aec72bdb096d1cabd4911985715e9ea13d35ff09095c035db15d4ab08b92eda7c10026cc27348cb9728c212335f7fcdcda7c610856ec30f  linux-3.8.tar.xz
593558a44a093ff047725da447c7fb08c1f158fbbaaf212fe3af79ef2aa5cbb649d0368bd8fe375d3dd44a8ffa502d3feab33854119ce603b8a828cf052b97ff  kernelconfig.x86
0e4444477b39b44efda4b7d956d9208177d371cc3fb6837e3fb417fb9d95fd854457a72304715cbb3c6536244351341a0255277322102eddc43e5eb3b72dc91b  kernelconfig.x86_64
21e6fab06aa30902d764db948183c3e3f14e6f598a1e5e09fa723b1816a718425f31179c353528711ecde3181a0ceaecb93d9911f448da091a90e76557ea557d  dvb-realtek-usbid.patch
d2288c3110a6cc603621a85dacfa47ce764769e56e369dc9ddec722e4efc7ac642bf74ad431d2656ce34e32c3b3e95e8e2ff7f7e5475c0d0bde334badd640b4e  patch-3.8.11.xz"