pkgname=linux6.6-zen
version=6.6.7
revision=1
zen=1
wrksrc="linux-${version}-zen${zen}"
short_desc="Linux kernel and modules with Zen patches (${version%.*} series) compiled with Clang"
maintainer="Wizzard <retard@deadzone.lol>"
license="GPL-2.0-only"
homepage="http://www.zen-kernel.org/"
distfiles="https://github.com/zen-kernel/zen-kernel/archive/refs/tags/v${version}-zen${zen}.tar.gz"
checksum="07fb5c68565142c7b66c65459b77aa6c146d97ad36736ac7e8df051d9594c99e"
python_version=3
patch_args="-Np1"

nodebug=yes  # -dbg package is generated below manually
nostrip=yes
noverifyrdeps=yes
noshlibprovides=yes
preserve=yes

hostmakedepends="tar xz lz4 bc-gh elfutils-devel flex gmp-devel kmod libmpc-devel
 openssl-devel perl uboot-mkimage cpio clang llvm lld pahole python3 which"

_kernver="${version}-zen${zen}_${revision}"
triggers="kernel-hooks"
kernel_hooks_version="${_kernver}"

# These files could be modified when an external module is built.
mutable_files="
 /usr/lib/modules/${_kernver}/modules.builtin.bin
 /usr/lib/modules/${_kernver}/modules.builtin.alias.bin
 /usr/lib/modules/${_kernver}/modules.softdep
 /usr/lib/modules/${_kernver}/modules.dep
 /usr/lib/modules/${_kernver}/modules.dep.bin
 /usr/lib/modules/${_kernver}/modules.symbols
 /usr/lib/modules/${_kernver}/modules.symbols.bin
 /usr/lib/modules/${_kernver}/modules.alias
 /usr/lib/modules/${_kernver}/modules.alias.bin
 /usr/lib/modules/${_kernver}/modules.devname"

# reproducible build
export KBUILD_BUILD_TIMESTAMP=${SOURCE_DATE_EPOCH:-0}
export KBUILD_BUILD_USER=voidlinux
export KBUILD_BUILD_HOST=zen

if [ "$CROSS_BUILD" ]; then
	_cross="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
fi
if [ "${_patchver}" ]; then
	_version="EXTRAVERSION=${_patchver}"
fi

do_configure() {
	# If there's a file called <arch>-dotconfig, use it to
	# configure the kernel; otherwise use arch defaults and all stuff
	# as modules (allmodconfig).
	local arch subarch

	case "$XBPS_TARGET_MACHINE" in
		i686*) arch=i386;;
		x86_64*) arch=x86_64;;
		arm*) arch=arm;;
		aarch64*) arch=arm64;;
		ppc64le*) arch=powerpc; subarch=ppc64le;;
		ppc64*) arch=powerpc; subarch=ppc64;;
		ppc*) arch=powerpc;;
		mips*) arch=mips;;
	esac

	if [ -f ${FILESDIR}/${subarch:-$arch}-dotconfig-custom ]; then
		msg_normal "Detected a custom .config file for your arch, using it.\n"
		cp -f ${FILESDIR}/${subarch:-$arch}-dotconfig-custom .config
		make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=$arch ${_args} oldconfig
	elif [ -f ${FILESDIR}/${subarch:-$arch}-dotconfig ]; then
		msg_normal "Detected a .config file for your arch, using it.\n"
		cp -f ${FILESDIR}/${subarch:-$arch}-dotconfig .config
		make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=$arch ${_args} oldconfig
	elif [ -f ${FILESDIR}/${XBPS_TARGET_MACHINE%%-musl}-dotconfig ]; then
		msg_normal "Detected a .config file for your cpu family, using it.\n"
		cp -f ${FILESDIR}/${XBPS_TARGET_MACHINE%%-musl}-dotconfig .config
		make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=$arch ${_args} oldconfig
	else
		msg_normal "Defaulting to 'allmodconfig'.\n"
		make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=$arch ${_args} allmodconfig
	fi
	# Always use our revision to CONFIG_LOCALVERSION to match our pkg version.
	sed -i -e "s|^\(CONFIG_LOCALVERSION=\).*|\1\"_${revision}\"|" .config
}

do_build() {
	local arch _cross _args

	case "$XBPS_TARGET_MACHINE" in
		i686*) _args="bzImage modules"; arch=i386;;
		x86_64*) _args="bzImage modules"; arch=x86_64;;
		arm*) _args="zImage modules dtbs"; arch=arm;;
		aarch64*) _args="Image modules dtbs"; arch=arm64;;
		ppc*) _args="zImage modules"; arch=powerpc;;
		mips*) _args="uImage modules dtbs"; arch=mips;;
	esac
	export LDFLAGS=
	make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ARCH=$arch ${_version} ${_cross} ${makejobs} prepare
	make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ARCH=$arch ${_version} ${_cross} ${makejobs} ${_args}
}

do_install() {
	local arch subarch _args hdrdest

	case "$XBPS_TARGET_MACHINE" in
		i686*) arch=x86; subarch=i386;;
		x86_64*) arch=x86; subarch=x86_64;;
		arm*) arch=arm;;
		aarch64*) arch=arm64;;
		ppc*) arch=powerpc;;
		mips*) arch=mips;;
	esac

	# Run depmod after compressing modules.
	sed -i '2iexit 0' scripts/depmod.sh

	# Install kernel, firmware and modules
	make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=${subarch:-$arch} INSTALL_MOD_PATH=${DESTDIR} modules_install

	hdrdest=${DESTDIR}/usr/src/kernel-headers-${_kernver}

	vinstall .config 644 boot config-${_kernver}
	vinstall System.map 644 boot System.map-${_kernver}

	case "$arch" in
		x86)
			vinstall arch/x86/boot/bzImage 644 boot vmlinuz-${_kernver}
			;;
		arm)
			vinstall arch/arm/boot/zImage 644 boot
			make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=${subarch:-$arch} INSTALL_DTBS_PATH=${DESTDIR}/boot/dtbs/dtbs-${_kernver} dtbs_install
			;;
		arm64)
			vinstall arch/arm64/boot/Image 644 boot vmlinux-${_kernver}
			make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=${subarch:-$arch} INSTALL_DTBS_PATH=${DESTDIR}/boot/dtbs/dtbs-${_kernver} dtbs_install
			;;
		powerpc)
			# zImage on powerpc is useless as it won't load initramfs
			# raw vmlinux is huge, and this is nostrip, so do it manually
			vinstall vmlinux 644 boot vmlinux-${_kernver}
			/usr/bin/$STRIP ${DESTDIR}/boot/vmlinux-${_kernver}
			;;
		mips)
			vinstall arch/mips/boot/uImage.bin 644 boot uImage-${_kernver}
			make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=${subarch:-$arch} INSTALL_DTBS_PATH=${DESTDIR}/boot/dtbs/dtbs-${_kernver} dtbs_install
			;;
	esac

	# Switch to /usr.
	vmkdir usr
	mv ${DESTDIR}/lib ${DESTDIR}/usr

	cd ${DESTDIR}/usr/lib/modules/${_kernver}
	rm -f source build
	ln -sf ../../../src/kernel-headers-${_kernver} build

	cd ${wrksrc}
	# Install required headers to build external modules
	install -Dm644 Makefile ${hdrdest}/Makefile
	install -Dm644 kernel/Makefile ${hdrdest}/kernel/Makefile
	install -Dm644 .config ${hdrdest}/.config
	for file in $(find . -name Kconfig\*); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	for file in $(find arch/${subarch:-$arch} -name module.lds -o -name Kbuild.platforms -o -name Platform); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	mkdir -p ${hdrdest}/include
	# Remove firmware stuff provided by the "linux-firmware" pkg.
	rm -rf ${DESTDIR}/usr/lib/firmware

	for i in acpi asm-generic clocksource config crypto drm generated linux vdso \
		math-emu media net pcmcia scsi sound trace uapi video xen dt-bindings; do
		if [ -d include/$i ]; then
			cp -a include/$i ${hdrdest}/include
		fi
	done

	cd ${wrksrc}
	mkdir -p ${hdrdest}/arch/${arch}
	cp -a arch/${arch}/include ${hdrdest}/arch/${arch}

	# Remove helper binaries built for host,
	# if generated files from the scripts/ directory need to be included,
	# they need to be copied to ${hdrdest} before this step
	if [ "$CROSS_BUILD" ]; then
		make CC=clang AS=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump HOSTCC=clang HOSTLD=ld.lld HOSTAR=llvm-ar ${makejobs} ARCH=${subarch:-$arch} _mrproper_scripts
		# remove host specific objects as well
		find scripts -name '*.o' -delete
	fi

	# Copy files necessary for later builds, like nvidia and vmware
	cp Module.symvers ${hdrdest}
	cp -a scripts ${hdrdest}
	mkdir -p ${hdrdest}/security/selinux
	cp -a security/selinux/include ${hdrdest}/security/selinux
	mkdir -p ${hdrdest}/tools/include
	cp -a tools/include/tools ${hdrdest}/tools/include

	mkdir -p ${hdrdest}/arch/${arch}/kernel
	cp arch/${arch}/Makefile ${hdrdest}/arch/${arch}
	if [ "$subarch" = "i386" ]; then
		mkdir -p ${hdrdest}/arch/x86
		cp arch/x86/Makefile_32.cpu ${hdrdest}/arch/x86
	fi
	if [ "$arch" = "x86" ]; then
		mkdir -p ${hdrdest}/arch/x86/kernel
		cp arch/x86/kernel/asm-offsets.s ${hdrdest}/arch/x86/kernel
	elif [ "$arch" = "arm64" ]; then
		mkdir -p ${hdrdest}/arch/arm64/kernel
		cp -a arch/arm64/kernel/vdso ${hdrdest}/arch/arm64/kernel/
	fi

	# add headers for lirc package
	# pci
	for i in bt8xx cx88 saa7134; do
		mkdir -p ${hdrdest}/drivers/media/pci/${i}
		cp -a drivers/media/pci/${i}/*.h ${hdrdest}/drivers/media/pci/${i}
	done	
	# i2c
	mkdir -p ${hdrdest}/drivers/media/i2c
	cp drivers/media/i2c/*.h ${hdrdest}/drivers/media/i2c
	for i in cx25840; do
		mkdir -p ${hdrdest}/drivers/media/i2c/${i}
		cp -a drivers/media/i2c/${i}/*.h ${hdrdest}/drivers/media/i2c/${i}
	done

	# Add md headers
	mkdir -p ${hdrdest}/drivers/md
	cp drivers/md/*.h ${hdrdest}/drivers/md

	# Add inotify.h
	mkdir -p ${hdrdest}/include/linux
	cp include/linux/inotify.h ${hdrdest}/include/linux

	# Add wireless headers
	mkdir -p ${hdrdest}/net/mac80211/
	cp net/mac80211/*.h ${hdrdest}/net/mac80211

	# add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/lgdt330x.h \
		${hdrdest}/drivers/media/dvb-frontends/
	cp drivers/media/i2c/msp3400-driver.h ${hdrdest}/drivers/media/i2c/

	# add dvb headers
	mkdir -p ${hdrdest}/drivers/media/usb/dvb-usb
	cp drivers/media/usb/dvb-usb/*.h ${hdrdest}/drivers/media/usb/dvb-usb/
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/*.h ${hdrdest}/drivers/media/dvb-frontends/
	mkdir -p ${hdrdest}/drivers/media/tuners
	cp drivers/media/tuners/*.h ${hdrdest}/drivers/media/tuners/

	# Add xfs and shmem for aufs building
	mkdir -p ${hdrdest}/fs/xfs/libxfs
	mkdir -p ${hdrdest}/mm
	cp fs/xfs/libxfs/xfs_sb.h ${hdrdest}/fs/xfs/libxfs/xfs_sb.h

	# Add objtool binary, needed to build external modules with dkms
	case "$XBPS_TARGET_MACHINE" in
		x86_64*)
			mkdir -p ${hdrdest}/tools/objtool
			cp tools/objtool/objtool ${hdrdest}/tools/objtool
			;;
	esac

	# Remove unneeded architectures
	case "$arch" in
		i386|x86_64) _args="arm* m* p*";;
		arm|arm64) _args="x86* m* p*";;
		powerpc) _args="arm* m* x86* parisc";;
		mips) _args="arm* x86* p*";;
	esac
	for arch in alpha avr32 blackfin cris frv h8300 \
		ia64 s* um v850 xtensa ${_args}; do
		rm -rf ${hdrdest}/arch/${arch}
	done
	# Keep arch/x86/ras/Kconfig as it is needed by drivers/ras/Kconfig
	mkdir -p ${hdrdest}/arch/x86/ras
	cp -a arch/x86/ras/Kconfig ${hdrdest}/arch/x86/ras/Kconfig

	# Extract debugging symbols and compress modules
	msg_normal "$pkgver: extracting debug info and compressing modules, please wait...\n"
	install -Dm644 vmlinux ${DESTDIR}/usr/lib/debug/boot/vmlinux-${_kernver}
	(
	cd ${DESTDIR}
	export DESTDIR
	find ./ -name '*.ko' -print0 | \
		xargs -0r -n1 -P ${XBPS_MAKEJOBS} ${FILESDIR}/mv-debug
	)
	# ... and run depmod again.
	depmod -b ${DESTDIR}/usr -F System.map ${_kernver}
}
linux6.6-zen-headers_package() {
	preserve=yes
	nostrip=yes
	noshlibprovides=yes
	short_desc+=" - source headers for 3rd party modules"
	pkg_install() {
		vmove usr/src
		vmove usr/lib/modules/${_kernver}/build
	}
}
linux6.6-zen-dbg_package() {
	preserve=yes
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	repository=debug
	short_desc+=" - debugging symbols"
	pkg_install() {
		vmove usr/lib/debug
	}
}