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

pkgname="linux-samsung-i9003"
pkgver=3.0.101
pkgrel=15
pkgdesc="Samsung Galaxy SI SLC kernel"
arch="armhf"
_carch="arm"
_flavor="samsung-i9003"
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 busybox-static-armhf"

# Compiler: latest GCC from Alpine
HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

# Source
_repository="android_kernel_samsung_latona"
_commit="7b8d73dd32e6cd21107f9a963a32a5ed237a6e78"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/dhiru1602/${_repository}/archive/${_commit}.tar.gz
	$_config
	00_return_address.patch
	01_twl_power_init.patch
	02_mfd_driver_fix.patch
	03_fix_paranoid_network_disabled.patch
	gcc7-give-up-on-ilog2-const-optimizations.patch
	gcc8-fix-put-user.patch
	kernel-use-the-gnu89-standard-explicitly.patch
	init
"
builddir="$srcdir/${_repository}-${_commit}"

prepare_isorec() {
	# Use Alpine's busybox.static instead of the pre-compiled busybox shipped
	# with the source
	mkdir "$builddir"/usr/latona_initramfs_files/
	cp -v /usr/$(arch_to_hostspec $arch)/bin/busybox.static \
		"$builddir"/usr/latona_initramfs_files/busybox

	# do not use ramdisk.cpio and ramdisk-recovery-device.cpio, always use
	# the initramfs from the recovery partition ("isorec"), so we can build
	# it later and independently from the kernel. also directly boot that
	# partition, not only when the recovery key combination was used.
	cd "$builddir"/usr/
	mv latona_initramfs.list latona_initramfs.list_old
	grep -v "../../ramdisk" latona_initramfs.list_old > latona_initramfs.list
	cp -v "$srcdir"/init "$builddir"/usr/latona_initramfs_files/init
	
	# Paths supplied to gen_initramfs_list.sh are prefixed with "source/".
	ln -s "$builddir" ln -s "$builddir"/source
}

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

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

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
	
	cd "$builddir"
	unset LDFLAGS

	echo "--[ Installing modules ]--"
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1))-postmarketOS" \
		INSTALL_MOD_PATH="$pkgdir" INSTALL_MOD_STRIP=1 modules_install
}

sha512sums="b7ca46b856a0c160ae36a98da39147deb85c054e902447ab68bcd4a011986eee486fb681d0bb832b9b57797aca35332483e99379b792bd467b1f030328bd83c7  linux-samsung-i9003-7b8d73dd32e6cd21107f9a963a32a5ed237a6e78.tar.gz
ac6d9fd10aca7a9460d26bd78d70a6aacfdc9ca28ec10a04210211f748724dbb0018c6388d407327c8736f896c956b0d8ba4b3c72f05e65cd664a8261381a9a9  config-samsung-i9003.armhf
c40eaa11547f5bc2b1ff965506bdfe3015ff16e4b5ad9ccb3b8134ceafd1d32407c4ef2b213e02e036ce1e9bdcbfe768dff7d4b054bec77705a176c1f783b6f5  00_return_address.patch
1972a2b5c429d6bf5fa1423e8805bb89bbd80c4efe6d235cb2037de6ba4d15c01e90239392161d6e5a0802eafaab6e8b468a49a12dc5b66469a111262cde2047  01_twl_power_init.patch
5b951a2ab60a89fbc3ca209960987035001a6f9147f8ab5c05a6b49ec6dee75d0b6d053bef28df37e583bfc903599beed16692e25ee363e6200e14839d0dda65  02_mfd_driver_fix.patch
df62e03666313bb03d9a455eac875f170a55d378b6e56b847c1c6ff1ce5cfafcfdf1d7605754ca3c684840ea00357f9ec4c6621f6ff77377132a484b9258f6f7  03_fix_paranoid_network_disabled.patch
77eba606a71eafb36c32e9c5fe5e77f5e4746caac292440d9fb720763d766074a964db1c12bc76fe583c5d1a5c864219c59941f5e53adad182dbc70bf2bc14a7  gcc7-give-up-on-ilog2-const-optimizations.patch
197d40a214ada87fcb2dfc0ae4911704b9a93354b75179cd6b4aadbb627a37ec262cf516921c84a8b1806809b70a7b440cdc8310a4a55fca5d2c0baa988e3967  gcc8-fix-put-user.patch
ad0182a483791fc88e058838bc331b2f04a75ba291e763767babdb815efadfc3b4fda97e69e2e3f00a426cabea088e35297a92bd287592597d1e309be68ee92c  kernel-use-the-gnu89-standard-explicitly.patch
dd4094d5f4ec281d32f12af88cb22a782e497c8e52f69cf60b73ac7d6171fc95f1f8040b3d0ad2ff3f016d22ac1d91c5b522e5d03203534a76742bc55a082af5  init"