# 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="1dae34efb7d2399073ca371c953aafd2ed503849"
_config="config-${_flavor}.armhf"

pkgname=linux-${_flavor}
pkgver=3.4.0
case $pkgver in
	*.*.*)  _kernver=${pkgver%.*};;
	*.*) _kernver=$pkgver;;
esac
pkgrel=6
arch="armhf"
pkgdesc="LineageOS kernel for Nexus 5 hammerhead"
url="https://github.com/LineageOS/android_kernel_lge_hammerhead"
depends="postmarketos-mkinitfs"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev python2"
options="!strip !check !tracedeps"
install=
source="
	$pkgname-$_hash.tar.gz::https://github.com/LineageOS/android_kernel_lge_hammerhead/archive/${_hash}.tar.gz
	${_config}
	compiler-gcc6.h
	aeea3592a13bf12861943e44fc48f1f270941f8d.patch
	gpu-msm-fix-gcc5-compile.patch
"
subpackages=""
license="GPL2"

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

ksrcdir="$srcdir/android_kernel_lge_hammerhead-${_hash}"

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
	echo "--[ silentoldconfig ]--"
        yes "" | make -C "$ksrcdir" O="$srcdir"/build ARCH="$_carch" HOSTCC="$HOSTCC" \
                oldconfig
}



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

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

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

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

	cd "$srcdir"/build
	unset LDFLAGS
	echo "--[ Installing modules ]--"
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine" CONFIG_NO_ERROR_ON_MISMATCH=y \
		INSTALL_MOD_PATH="$pkgdir" modules_install \
		|| return 1
}

sha512sums="06efc786722f904c5e37657c96b96fb3e6b005837aac3c63a75751a80d7ff5800af072e3095bbdf32f3ac602125f98ad6f99f82892d19668fe320874b720f543  linux-lg-hammerhead-1dae34efb7d2399073ca371c953aafd2ed503849.tar.gz
a1ab65fcababe36e181a15f904a57a3958781d9b7f39b0376592130771037a539fcb58801051358ac7f9e5651e8316959f2bf508444b5e415df8b6672aafa16e  config-lg-hammerhead.armhf
d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
ea1d3b5a234fa565e3c1a792de48f4fc4e6023d281d303c8e319c7ef28edc5739ab0e4dea0139a41f0a5c7d03e27921ccaa214fd0ac5c72245a094ce60128864  aeea3592a13bf12861943e44fc48f1f270941f8d.patch
7be03a9e78b7ac330a54b1f00509caa0621a95c0c55901878ad757f9dd69cc05ba2c8b5ea987063ae1224f92c4d090d515fa5d369e7755181a4871b0d0f82881  gpu-msm-fix-gcc5-compile.patch"