# APKBUILD based on linux-vanilla aport. Changes:
# - disabled module installation
# - add !check !tracedeps
# - package: just install zimage and kernel.release, because the kernel config
#	does not generate modules or dtb files
# - do not create -dev subpackage (makes no sense without module support)
#
# Kernel config based on: arch/arm/configs/lineageos_mako_defconfig
# Changes:
# - enable devtmpfs (needed for udev -> touch support in weston)

_vendor=lg
_flavor=lg-hammerhead
_hash="v4.11"
_config="config-${_flavor}.armhf"

pkgname=linux-${_flavor}
pkgver=4.11
case $pkgver in
	*.*.*)  _kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=3
arch="armhf"
pkgdesc="Linux 4.11 with hammerhead config"
url="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/?qt=grep&q=hammerhead"
depends="postmarketos-mkinitfs"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev"
options="!strip !check !tracedeps"
install=
source="
	https://github.com/torvalds/linux/archive/${_hash}.zip
	$_config
"
subpackages=""
license="GPL2"

_abi_release=${pkgver}
_carch="arm"
HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

ksrcdir="$srcdir/linux-${pkgver}"

prepare() {
	local _patch_failed=
	cd "$ksrcdir"

	# 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

	# gcc6 support
	# cp -v "$srcdir/compiler-gcc6.h" "$ksrcdir/include/linux/"

	mkdir -p "$srcdir"/build
	cp "$srcdir"/$_config "$srcdir"/build/.config || return 1
	rm "$ksrcdir"/arch/arm/boot/dts/include/dt-bindings
	ln -s "$ksrcdir"/include/dt-bindings "$ksrcdir"/arch/arm/boot/dts/include/
	make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" CROSS_COMPILE=arm-linux-gnueabi- \
		silentoldconfig
}



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

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

package() {
	install -Dm644 "$srcdir/build/arch/arm/boot/zImage" \
		"$pkgdir/boot/vmlinuz-$_flavor"

	install -D "$srcdir/build/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"
}

sha512sums="bfce6c290a7d372a018599fb835800a2cb5c3488883f4bd55c78b2197c6fb9420a8ac2f7740c054330948c62f0ffeafccdd386b6b57e8e4e794a74abb0ff12f6  v4.11.zip
ab220bd127daf0eb3b97279d6f050b520a0cf51c7f25ac2dae3ad038644344dbbe42a62fc8a258f4be1cedc5713ffff479bdbc8ea4c13974b67988f4f7fcd02a  config-lg-hammerhead.armhf"