# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm/configs/surnia_defconfig

pkgname="linux-motorola-surnia"
pkgver=3.10.49
pkgrel=1
pkgdesc="Motorola Moto E (2nd Gen) kernel fork"
arch="armhf"
_carch="arm"
_flavor="motorola-surnia"
url="https://kernel.org"
license="GPL-2.0-only"
options="!strip !check !tracedeps"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev dtbtool gcc6 xz"

# Compiler: GCC 6 (doesn't compile with newer versions)
if [ "${CC:0:5}" != "gcc6-" ]; then
    CC="gcc6-$CC"
    HOSTCC="gcc-6"
    CROSS_COMPILE="gcc6-$CROSS_COMPILE"
fi

# Source
_repository="android_kernel_motorola_msm8916"
_commit="4c864820053bb70e21cf1e9764baefefd4d2f6b1"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/LineageOS/${_repository}/archive/${_commit}.tar.gz
	$_config
	gcc7-give-up-on-ilog2-const-optimizations.patch
"
builddir="$srcdir/${_repository}-${_commit}"

prepare() {
	default_prepare
	downstreamkernel_prepare "$srcdir" "$builddir" "$_config" "$_carch" "$HOSTCC"
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"

	# Generate master DTB (deviceinfo_bootimg_qcdt)
	dtbTool -s 2048 -p "scripts/dtc/" -o "arch/arm/boot/dt.img" "arch/arm/boot/"
}

package() {
	# kernel.release
	install -D "$builddir/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"

	# zImage (find the right one)
	cd "$builddir/arch/$_carch/boot"
	_target="$pkgdir/boot/vmlinuz-$_flavor"
	for _zimg in zImage-dtb Image.gz-dtb *zImage Image; do
		[ -e "$_zimg" ] || continue
		msg "zImage found: $_zimg"
		install -Dm644 "$_zimg" "$_target"
		break
	done
	if ! [ -e "$_target" ]; then
		error "Could not find zImage in $PWD!"
		return 1
	fi

	# Master DTB (deviceinfo_bootimg_qcdt)
	install -Dm644 "$builddir/arch/arm/boot/dt.img" \
		"$pkgdir/boot/dt.img"
}

sha512sums="28e70a5af0df65b85c257c4ca455553d38b17dad8d141876854c5a38502114638c8e59440cffcf81c278a6836e39ec0f63ed35dad825c49a8c3f299de7617b80  linux-motorola-surnia-4c864820053bb70e21cf1e9764baefefd4d2f6b1.tar.gz
44b4dbdddbc054f5d8188fde5ae4197c6005aadbf0ebf82fdf50fa529bc5b09fed62744fdb6592a9790e99795c5f7be9763a515ff43bd990117372ac5ff2f8a2  config-motorola-surnia.armhf
77eba606a71eafb36c32e9c5fe5e77f5e4746caac292440d9fb720763d766074a964db1c12bc76fe583c5d1a5c864219c59941f5e53adad182dbc70bf2bc14a7  gcc7-give-up-on-ilog2-const-optimizations.patch"