# Co-Maintainer: Achill Gilgenast <achill@achill.org>
maintainer="Aelin <aelin@postmarketos.org>"
pkgname=linux-postmarketos-lts
pkgver=6.18.40
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
	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 -D "$builddir"/include/config/kernel.release \
		"$pkgdir"/usr/share/kernel/"$_flavor"/kernel.release
}

sha512sums="
cf265aed22e83bcd8f34d3c0da2a8307654b16338c8be383784632105e21f0d9dc5b73c3732e415230c4164b2b2c9e5915808335e2f10e28207aeed4d773ca56  patch-6.18.40.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
7116c567c77b57967bb48a3ecaefa248082800aa57c8d3f7b9f22e6891418256418ebf0c0e5947bf0a7b5c6c9f867b89ab223d330e2757b18814af1a05a409e1  config-lts.aarch64
88970a2f87a1033efeb7febb461a5ac1f228712ddbdaedb58f5156641bd942487c7857847eaabcd4a7049c81f9bc7ceeddd9a0237e6a69b73a766c66e2d189d4  config-lts.armv7
65eb2378fdafff0a3222c71d59a16bb6b0bd14dcd9f17eab26aef34ee787785fb1f7adc29b795fb6f5f1da7e52dd4386b9aac3620cebc7835b70730c10bc8bf9  config-lts.loongarch64
58d26076f8a0d953b3aa8929f63c60d35bfa8b202691d56b8d61d595a7eda71c67f297af00f26cdc6dbb5c4aab8be42ff4e0162b616fa69f6894378b4b0b8c12  config-lts.ppc64le
ccde9dda11e48b4e84b43aabae44ee99e58f96dd63f48510c5e8b4c8e7e77f29aa4e14b101ebf411ab17a2d695c09cd5526f0ac131391ed1ba91e08fc9ebf3b8  config-lts.riscv64
4af3f7ce551b133ba332167c1ba68942d106e091fbc4348c9d951d65d828c79ac979b8aaaaa66d1871d936ece795497327926eaf234f19db0cecd7198ce85a6d  config-lts.x86
644d589da096339c70c1009d3d0dde8017e1b2ef213ca7e0fd9ccdaf53a14db77a7fe4b0e01ef6117b271dab237c62efbf48a38bf178a0821cda8a96663d9325  config-lts.x86_64
"
