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

_flavor=vanilla
pkgname=linux-${_flavor}
pkgver=4.1.11
case $pkgver in
	*.*.*)	_kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=1
pkgdesc="Linux vanilla kernel"
url="http://kernel.org"
depends="mkinitfs linux-firmware"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers"
options="!strip"
_config=${config:-config-vanilla.${CARCH}}
install=
source="http://ftp.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/linux-$_kernver.tar.xz

	config-vanilla.armhf
	config-vanilla.x86
	config-vanilla.x86_64
	"
if [ "${pkgver%.0}" = "$pkgver" ]; then
	source="$source
	http://ftp.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/patch-$pkgver.xz"
fi
subpackages="$pkgname-dev"
arch="all"
license="GPL2"

_abi_release=${pkgver}

prepare() {
	local _patch_failed=
	cd "$srcdir"/linux-$_kernver
	if [ "$_kernver" != "$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 "$srcdir"/build
	export GCC_SPECS=hardenednopie.specs
	make CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" \
		|| return 1
}

package() {
	cd "$srcdir"/build

	mkdir -p "$pkgdir"/boot "$pkgdir"/lib/modules

	local _install
	case "$CARCH" in
	arm*)
		local _dtbdir="$pkgdir"/usr/lib/linux-${_abi_release}
		mkdir -p "$_dtbdir"
		for i in arch/arm/boot/dts/*.dtb ; do
			install -m644 "$i" "$_dtbdir"
		done

		_install=zinstall
		;;
	*)
		_install=install
		;;
	esac

	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="fe9dc0f6729f36400ea81aa41d614c37  linux-4.1.tar.xz
8d4820f5abed2b8cf4fd6e56c9302f3b  config-vanilla.armhf
36440f218183e8d3e6ee6b729745a659  config-vanilla.x86
e59afa6003990cbc349f8df8127eb213  config-vanilla.x86_64
46a403b167416719901565190298e680  patch-4.1.11.xz"
sha256sums="caf51f085aac1e1cea4d00dbbf3093ead07b551fc07b31b2a989c05f8ea72d9f  linux-4.1.tar.xz
8be1ee04ff313327169f186f397d36dab15bef9d46904f81a2e9b69402c7264f  config-vanilla.armhf
38cc4ce8f2054faa8c5a4424d545b6057e044eb650eb5877ce06f86c8cbcd081  config-vanilla.x86
426523503623a1da3fa3dad364260576e05d04d293d534affd2e697fd807fd77  config-vanilla.x86_64
f98156dd7ceac2849de16b38cdb7a530cd3c74833ab613e0822b7bc4583cccb1  patch-4.1.11.xz"
sha512sums="168ef84a4e67619f9f53f3574e438542a5747f9b43443363cb83597fcdac9f40d201625c66e375a23226745eaada9176eb006ca023613cec089349e91751f3c0  linux-4.1.tar.xz
d1f6a4d5f02bc3a3ea6f047f450d86b43040989949d086672193ab29378a3acacf13573f42b8b94952bffee38cfa5ba69ba04c7893c199610b99effca5db5c69  config-vanilla.armhf
148210319d3e2b2f8399c473124ed90e70ea2ee0daaaf8f8b59e42360a9e58f030d221af5554d493aae021e7ba30297f5570935eab978eb05c4ff04cf24e68b3  config-vanilla.x86
a1f005a42724f7fb4f2d851ac0753dd623767b9209c2560a1aa1b7cb4217ecc5e1431453cd3c4658066e3562017340c5f0c612f25f4a1eeb0f51835d6b4a5198  config-vanilla.x86_64
ebd9f9ed7a4921795a0aee43440f6c73bf2ba058a690eb96031b978e61e390ef4d3b64e818a7cce7fe520adb20b93e4b7dd485b50d32c2dcf3012db3477a852c  patch-4.1.11.xz"