# Co-Maintainer: Achill Gilgenast <achill@achill.org>
maintainer="Aelin <aelin@postmarketos.org>"
pkgname=linux-postmarketos-lts
pkgver=6.18.46
pkgrel=0
_kver=${pkgver%.*}
pkgdesc="LTS Kernel"
# armhf: pmbootstrap cannot dynamically choose a defconfig, so it ends up using multi_v7_defconfig which isn't correct
# s390x: kconfigcheck is not ready for it yet
arch="all !armhf !s390x"
_flavor="lts"
url="https://kernel.org"
license="GPL-2.0-only"
options="
	!check
	!strip
	!tracedeps
	pmb:cross-native
	pmb:generic-kernel
	pmb:kconfigcheck-community
	pmb:kconfigcheck-immutable
	pmb:kconfigcheck-lockdown
	pmb:kconfigcheck-rust
	pmb:kconfigcheck-selinux
	pmb:kconfigcheck-uefi
	pmb:kconfigcheck-virt
"
makedepends="
	bash
	bison
	clang
	clang-libclang
	diffutils
	elfutils-dev
	findutils
	flex
	grep
	kmod
	linux-headers
	lld
	llvm
	openssl-dev
	pahole
	perl
	postmarketos-installkernel
	python3
	rust
	rust-bindgen
	rust-src
	rustfmt
	sed
	zstd
"
replaces="linux-lts"

# powerpc boot wrapper patches:
# Necessary for compilation without cross GCC in PATH, cherry-picked from
# Nathan's fork, he does not have time to upstream them right now but would be
# happy if someone else did:
# https://lore.kernel.org/linuxppc-dev/aXs8sgAcci9FKKpx@luna/
#
# Patch #4 is a backport that makes ftrace work when built with Clang, which is
# required for passing kconfigcheck.
source="
	linux-$_kver.tar.xz::https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/linux-$_kver.tar.xz

	0001-WIP-arch-powerpc-boot-Support-LLVM-1-in-wrapper-scri.patch
	0002-WIP-arch-powerpc-boot-Use-z-notext-for-pseries-image.patch
	0003-WIP-arch-powerpc-boot-Add-z-norelro.patch

	0004-powerpc64-ftrace-fixes-clang-build-issues.patch

	config-lts.aarch64
	config-lts.armv7
	config-lts.loongarch64
	config-lts.ppc64le
	config-lts.riscv64
	config-lts.x86
	config-lts.x86_64
"
builddir="$srcdir/linux-$_kver"

if [ "${pkgver%.0}" = "$pkgver" ]; then
	# Prepend to apply first
	source="patch-$pkgver.patch.xz::https://cdn.kernel.org/pub/linux/kernel/v${pkgver%%.*}.x/patch-$pkgver.xz $source"
fi

case "$CARCH" in
	aarch64*) _carch="arm64" ;;
	arm*) _carch="arm" ;;
	loongarch*) _carch="loongarch" ;;
	ppc*) _carch="powerpc" ;;
	riscv*) _carch="riscv" ;;
	s390x) _carch="s390" ;;
	x86) _carch="i386" ;;
	x86_64) _carch="x86_64" ;;
esac

prepare() {
	default_prepare
	cp "$srcdir/config-$_flavor.$CARCH" .config
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" LLVM=1 HOSTLDFLAGS="-fuse-ld=lld" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-$_flavor"
}

package() {
	local _install
	case "$CARCH" in
		arm*|aarch64|riscv*) _install="zinstall dtbs_install" ;;
		*) _install="install" ;;
	esac

	make modules_install $_install \
		ARCH="$_carch" \
		LLVM=1 \
		INSTALL_PATH="$pkgdir"/boot \
		INSTALL_MOD_PATH="$pkgdir"/usr \
		INSTALL_MOD_STRIP=1 \
		INSTALL_DTBS_PATH="$pkgdir"/boot/dtbs

	rm -f "$pkgdir"/usr/lib/modules/*/build "$pkgdir"/usr/lib/modules/*/source

	install -Dm644 "$builddir"/include/config/kernel.release \
		"$pkgdir"/usr/share/kernel/"$_flavor"/kernel.release
}

sha512sums="
65c591cec2589f114e465e3d3367c1905e4d430761f1e0f0109ff93a907e2533ee89205f0dd2a1a2ef35dce0000e28bef717c05d0f2f70341547b2fb948ad8c6  patch-6.18.46.patch.xz
88599ffdec96d150c1feb9b261ba93bb0301a9d0e1ad6bef7aeab1f5372cbfc57d8b43c7e902bd8f76921d1dbd8189663c142ea869e51d0e2b483b150ee00fe0  linux-6.18.tar.xz
1f11df2480e9f691573283597160b4c806e492cdca4825f3acb3afb70bde43abfab487bcde1f5553b431a702a0039479d041b0ce7859970e706b5a51d2ad8fb0  0001-WIP-arch-powerpc-boot-Support-LLVM-1-in-wrapper-scri.patch
26521a9c9ea769534095dc4e306babadc8bcbaf03d7faa523c377e41ba0f742ecd0490fa27791d895f729c3ae8845297dca59b4db2475e7f078e689c447430bc  0002-WIP-arch-powerpc-boot-Use-z-notext-for-pseries-image.patch
302c20c85559fc9b3b2420ed25be1bfbb76c87f2a470e4141c32e9542cf1f5c6b3b5a7847231a3eaa0f6bc0e5942d0c1599e807175dcf5e63469704c3d6adde3  0003-WIP-arch-powerpc-boot-Add-z-norelro.patch
166f9151618780afb269822d2b0c7580830fc47b20aa1ea08006a119a5234277fba5dbc2d0be469f3285bf8debd2dcfd078c2f92b206d1491620d94432c7b11b  0004-powerpc64-ftrace-fixes-clang-build-issues.patch
c4ee07fccc19a16db848e1b5353130df27d759cf765fbe017e5dfbaeae2898feae6736ebc2bcc716bffc7c39a46a86e729780633994e33aa6c05fa78a616b231  config-lts.aarch64
e6ea66e720d055a9455b145cc1a9aa0987832e567d41fc747179500bc10c42df76aad4512d981a4f179967acd0999b274ac8e3c2a91b39f7b8a302f8e504f637  config-lts.armv7
47f81e54600847eafafe1899f78da4ba67510af31ea951a9a44b43a0889df1dc5be2c8548422dbf5153bfd2a75c30929a59c9ff353f8667e2e4199bfb32c583b  config-lts.loongarch64
e0e35fdb177a75c402f7838edacccecd42ee94cb11d7c5764f53ebcb6eaaa5122f59d16f0834d43381962b03a908deaac4649537249b277b650b4f9bf9ea2b8a  config-lts.ppc64le
afac4fb462029903177f97464f1e046dc649e7683f619c114e2343eaf1aa70ad29c76d22a40f273732d97e46e55275c68db67253111b58e13e30d959f6301312  config-lts.riscv64
db7049f0d9ca8c5521289da2a6b3a5fb4e289eed806a926023115410db3673d0859c8cad475c5d31ae1998881feb2fc029116c4770ff1b150b86b24de2e3d678  config-lts.x86
7859b081fd26d3861a1c917f693e3d73cdcd927bf54d48db9aa3127516ea0045dfe6a886f6b27471671771220655fdb365d898f9419dab2fc986de96a54f786b  config-lts.x86_64
"
