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

_flavor=grsec
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
	http://ftp.kernel.org/pub/linux/kernel/v3.x/patch-$pkgver.xz
	grsecurity-2.9.1-3.8.11-201305011917.patch

	0004-arp-flush-arp-cache-on-device-change.patch

	kernelconfig.x86
	kernelconfig.x86_64
	"
subpackages="$pkgname-dev"
arch="x86 x86_64 arm"
license="GPL-2"

_abi_release=${pkgver}-${pkgrel}-${_flavor}

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

	echo "-$pkgrel" > localversion-alpine

	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 bash"
	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
76ec67882ad94b8ab43c70a46befca13  patch-3.8.11.xz
c342846e7c9777833970010db7caeed4  grsecurity-2.9.1-3.8.11-201305011917.patch
776adeeb5272093574f8836c5037dd7d  0004-arp-flush-arp-cache-on-device-change.patch
acbaf31e9aca6a45627c19477503a562  kernelconfig.x86
39394a90e35d8d3bda64ffabb20b01be  kernelconfig.x86_64"
sha256sums="e070d1bdfbded5676a4f374721c63565f1c969466c5a3e214004a136b583184b  linux-3.8.tar.xz
4666f2ca152e454b090525efa79cfcacc81a3d82011e14c412f07edd45457a95  patch-3.8.11.xz
4a9f1fac68c2da2ccb770307d55521f9a77f3b991b28482ae2294fa064875a99  grsecurity-2.9.1-3.8.11-201305011917.patch
e2d2d1503f53572c6a2e21da729a13a430dd01f510405ffb3a33b29208860bde  0004-arp-flush-arp-cache-on-device-change.patch
3ad656f7a6af32ee58c80cb9cc3f7531ca5cb895638ffc21b1522992394e3106  kernelconfig.x86
dfad2f9e9a9dcc9d4d7568591ebdb81f01951a77c6ab8a539f29107eeb52dbbd  kernelconfig.x86_64"
sha512sums="10a7983391af907d8aec72bdb096d1cabd4911985715e9ea13d35ff09095c035db15d4ab08b92eda7c10026cc27348cb9728c212335f7fcdcda7c610856ec30f  linux-3.8.tar.xz
d2288c3110a6cc603621a85dacfa47ce764769e56e369dc9ddec722e4efc7ac642bf74ad431d2656ce34e32c3b3e95e8e2ff7f7e5475c0d0bde334badd640b4e  patch-3.8.11.xz
fddd7473872b141700defd0fd2b917f78fc1b3102932075f13944377a9bcc1e00eb44b3fca226f62e2f5556c24201db5129b5bc15a75263b3e07f850084e912c  grsecurity-2.9.1-3.8.11-201305011917.patch
b6fdf376009f0f0f3fa194cb11be97343e4d394cf5d3547de6cfca8ad619c5bd3f60719331fd8cfadc47f09d22be8376ba5f871b46b24887ea73fe47e233a54e  0004-arp-flush-arp-cache-on-device-change.patch
9da750f041ef5bda7bd745d59b7bbe5a0ec625a55510789dfc54359b9023a3b853aa53abd9e907b5922175779977389b5c8f4ff0272faad423f4feb8390cd906  kernelconfig.x86
9542d12a7cc483f9f626238dbded4fb7dbf79a74fbd3cd4d0853152c894ed6a8955e5444139c3194d1046c8da0bf43d5eb5f2fd416f0986aa2e269af048e32dc  kernelconfig.x86_64"