# Kernel config based on: arch/arm/configs/cm_a5_defconfig

pkgname="linux-htc-a5ul"
pkgver=3.4.0
pkgrel=2
pkgdesc="hTC Desire 816 kernel fork"
arch="armhf"
_carch="arm"
_flavor="htc-a5ul"
url="https://kernel.org"
license="GPL2"
options="!strip !check !tracedeps"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev lz4 dtbtool gcc6"

# Compiler: this kernel was only tested with GCC6. Feel free to make a merge
# request if you find out that it is booting working with newer GCCs as
# well. See <https://postmarketos.org/vendorkernel> for instructions.
if [ "${CC:0:5}" != "gcc6-" ]; then
	CC="gcc6-$CC"
	HOSTCC="gcc6-gcc"
	CROSS_COMPILE="gcc6-$CROSS_COMPILE"
fi

# Source
_repository="android_kernel_htc_msm8974"
_commit="2115207f50d4c2e4bad1f1fc1498109f57b6ebc7"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/bigsuperprojects/${_repository}/archive/${_commit}.tar.gz
	$_config
	compiler-gcc6.h
	0003-Fix-CC-error.patch
"
builddir="$srcdir/${_repository}-${_commit}"

prepare() {
	default_prepare

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

	# Remove -Werror from all makefiles
	local i
	local makefiles="$(find . -type f -name Makefile)
		$(find . -type f -name Kbuild)"
	for i in $makefiles; do
		sed -i 's/-Werror-/-W/g' "$i"
		sed -i 's/-Werror//g' "$i"
	done

	# Prepare kernel config ('yes ""' for kernels lacking olddefconfig)
	cp "$srcdir"/$_config "$builddir"/.config
	yes "" | make ARCH="$_carch" HOSTCC="$HOSTCC" oldconfig
}

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

	# Generate master DTB
	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

	# We need the dtb file
	install -Dm644 "$builddir/arch/arm/boot/dt.img" \
		"$pkgdir/boot/dt.img"
}

sha512sums="0d7df2eff49cb40fa5f5353b2c63bdb0f4dd9f654ac0f09ab2547f2e47b62659f011e9b5c1e4cf00307c8017e654980ad3065133964d5359a41af8704463522a  linux-htc-a5ul-2115207f50d4c2e4bad1f1fc1498109f57b6ebc7.tar.gz
583bb0eb6675837c0f1186926b059a2175983bd239f63fd73f7cefbf7cd95400e2e853c594c8303c6562d1df084c2ebbeb80153f9aeb54db15f8ba3c286627c2  config-htc-a5ul.armhf
d80980e9474c82ba0ef1a6903b434d8bd1b092c40367ba543e72d2c119301c8b2d05265740e4104ca1ac5d15f6c4aa49e8776cb44264a9a28dc551e0d1850dcc  compiler-gcc6.h
4d328283b2c4e55624703f204f804d9a40e5aa504d7c7198365536c47793d598271a63e864596c7b54ed8f60e74862ec6b4859a948c2c2ed2158f15cb148a94d  0003-Fix-CC-error.patch"