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‎Dockerfile.kernelbuild‎

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FROM ghcr.io/void-linux/void-glibc-full:latest
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RUN xbps-install -Syu xbps && xbps-install -Sy \
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bash bc binutils clang lld curl elfutils flex bison gcc kmod \
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elfutils-devel openssl-devel pahole perl python3 zlib-devel \
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zstd git make patch shadow sudo
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RUN useradd -m builder && echo 'builder ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/builder
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# clone void-packages as root, fix ownership
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RUN git clone --depth=1 https://github.com/void-linux/void-packages /void-packages && \
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chown -R builder:builder /void-packages
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# copy our linux-cachyos template
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COPY --chown=builder:builder kernel/srcpkgs/linux-cachyos /void-packages/srcpkgs/linux-cachyos
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WORKDIR /void-packages
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# Run as root so we can set up /output and copy results
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# Then switch to builder just for xbps-src commands
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CMD ["sh", "-c", "mkdir -p /output && chown builder:builder /output && su - builder -c 'cd /void-packages && ./xbps-src binary-bootstrap && ./xbps-src pkg linux-cachyos' && cp /void-packages/hostdir/binpkgs/*.xbps /output/ && ls -la /output/"]

‎README.md‎

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# VoidLinux Cachy Kernel
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*Provides CachyOS kernel support for Void Linux.*
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## Build
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### Requirements
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- Docker
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- xbps-src (optional - use directly if running Void Linux; Docker is better otherwise)
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### Building with Docker
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```bash
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docker build -f Dockerfile.kernelbuild -t npkg-kernelbuild . && docker run --rm --privileged -v ~/kernel-output:/output npkg-kernelbuild
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```
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## Notice
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This project is in early development and currently targets glibc x86_64 systems only. Install at your own risk. Issues can be reported to the project repository.

‎kernel/srcpkgs/linux-cachyos/files/config‎

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# CachyOS kernel config for npkg distro
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# Base: x86_64 defconfig + CachyOS tuning
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# Generated as a starting point — run `make menuconfig` to customize
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CONFIG_LOCALVERSION="-cachyos"
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CONFIG_LOCALVERSION_AUTO=n
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# Scheduler
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CONFIG_SCHED_BORE=y
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CONFIG_SCHED_CLASS_EXT=y
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CONFIG_PREEMPT=y
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CONFIG_PREEMPT_VOLUNTARY=n
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CONFIG_HZ_300=y
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CONFIG_HZ=300
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# Memory
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CONFIG_TRANSPARENT_HUGEPAGE=y
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CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
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CONFIG_LRU_GEN=y
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CONFIG_LRU_GEN_ENABLED=y
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# CPU
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CONFIG_GENERIC_CPU=y
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CONFIG_X86_64=y
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CONFIG_64BIT=y
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# Compression
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CONFIG_KERNEL_ZSTD=y
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CONFIG_MODULE_COMPRESS_ZSTD=y
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# Module versioning (required for Module.symvers / DKMS)
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CONFIG_MODULES=y
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CONFIG_MODVERSIONS=y
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# Security
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CONFIG_SECURITY=y
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CONFIG_SECURITY_SELINUX=n
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CONFIG_SECURITY_APPARMOR=y
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CONFIG_DEFAULT_SECURITY_APPARMOR=y
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# Filesystems
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CONFIG_EXT4_FS=y
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CONFIG_BTRFS_FS=y
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CONFIG_XFS_FS=y
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CONFIG_TMPFS=y
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CONFIG_TMPFS_POSIX_ACL=y
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CONFIG_VFAT_FS=y
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CONFIG_EXFAT_FS=y
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CONFIG_NTFS3_FS=y
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# Networking
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CONFIG_INET=y
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CONFIG_IPV6=y
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CONFIG_NETFILTER=y
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CONFIG_NF_TABLES=y
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# Virtio (for VM/QEMU support)
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CONFIG_VIRTIO=y
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CONFIG_VIRTIO_PCI=y
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CONFIG_VIRTIO_BLK=y
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CONFIG_VIRTIO_NET=y
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CONFIG_VIRTIO_CONSOLE=y
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# USB
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CONFIG_USB=y
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CONFIG_USB_XHCI_HCD=y
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CONFIG_USB_EHCI_HCD=y
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CONFIG_USB_STORAGE=y
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# Sound
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CONFIG_SOUND=y
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CONFIG_SND=y
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CONFIG_SND_HDA_INTEL=y
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# Graphics
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CONFIG_DRM=y
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CONFIG_DRM_I915=y
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CONFIG_DRM_AMDGPU=y
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CONFIG_DRM_NOUVEAU=y
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# Initramfs
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CONFIG_BLK_DEV_INITRD=y
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CONFIG_INITRAMFS_SOURCE=""

‎kernel/srcpkgs/linux-cachyos/template‎

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# Template file for 'linux-cachyos'
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pkgname=linux-cachyos
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version=7.0.0
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revision=1
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short_desc="Linux kernel with CachyOS patches (BORE scheduler, LRU_GEN)"
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maintainer="CachyVoid <noreply@cachyvoid>"
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license="GPL-2.0-only"
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homepage="https://github.com/CachyOS/linux-cachyos"
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arch="x86_64"
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_srcname="cachyos-${version}-${revision}"
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distfiles="https://github.com/CachyOS/linux/releases/download/${_srcname}/${_srcname}.tar.gz"
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checksum="d835e31dcc6665be43da8484d267e22e33f9f8b59e4f2892ce941705e728318a"
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wrksrc="${_srcname}"
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makedepends="bc binutils clang lld llvm elfutils elfutils-devel flex bison gcc kmod libelf openssl-devel pahole
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perl python3 zlib-devel zstd eudev-libudev-devel wireless-regdb"
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nopie=yes
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nosstrip=yes
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do_configure() {
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cd "${wrksrc}"
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# customized config
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cp "${FILESDIR}/config" .config
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make LLVM=1 olddefconfig
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}
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do_build() {
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cd "${wrksrc}"
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make LLVM=1 ${makejobs}
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}
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do_install() {
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cd "${wrksrc}"
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local _kernver
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_kernver="$(make -s kernelrelease)"
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vinstall arch/x86/boot/bzImage 644 boot "vmlinuz-${_kernver}"
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vinstall System.map 644 boot "System.map-${_kernver}"
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vinstall .config 644 boot "config-${_kernver}"
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make INSTALL_MOD_PATH="${DESTDIR}/usr" INSTALL_MOD_STRIP=1 modules_install
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local _hdrdir="usr/src/linux-headers-${_kernver}"
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vmkdir "${_hdrdir}"
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cp .config "${DESTDIR}/${_hdrdir}/.config"
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if [ -f Module.symvers ]; then
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cp Module.symvers "${DESTDIR}/${_hdrdir}/Module.symvers"
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elif [ -f vmlinux.symvers ]; then
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cp vmlinux.symvers "${DESTDIR}/${_hdrdir}/Module.symvers"
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msg_warn "Module.symvers missing; using vmlinux.symvers compatibility fallback"
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else
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msg_warn "Module.symvers not found; installing headers without symbol version table"
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fi
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cp System.map "${DESTDIR}/${_hdrdir}/System.map"
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cp Makefile "${DESTDIR}/${_hdrdir}/"
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cp Kbuild "${DESTDIR}/${_hdrdir}/" 2>/dev/null || true
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vcopy scripts "${_hdrdir}"
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vcopy include "${_hdrdir}"
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vmkdir "${_hdrdir}/arch"
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vcopy arch/x86/include "${_hdrdir}/arch/x86"
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cp arch/x86/Makefile "${DESTDIR}/${_hdrdir}/arch/x86/" 2>/dev/null || true
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[ -f arch/x86/Makefile_32.cpu ] && cp arch/x86/Makefile_32.cpu "${DESTDIR}/${_hdrdir}/arch/x86/"
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[ -f arch/x86/kernel/asm-offsets.h ] && {
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vmkdir "${_hdrdir}/arch/x86/kernel"
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cp arch/x86/kernel/asm-offsets.h "${DESTDIR}/${_hdrdir}/arch/x86/kernel/"
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}
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if [ ! -f "${DESTDIR}/${_hdrdir}/Module.symvers" ]; then
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msg_error "Module.symvers not found - modules may fail to build"
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fi
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vmkdir etc/kernel.d/post-install
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cat > "${DESTDIR}/etc/kernel.d/post-install/50-dracut-${_kernver}" <<-EOF
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#!/bin/sh
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dracut --force /boot/initramfs-${_kernver}.img ${_kernver}
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EOF
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chmod 0755 "${DESTDIR}/etc/kernel.d/post-install/50-dracut-${_kernver}"
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rm -f "${DESTDIR}/usr/lib/modules/${_kernver}/build"
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rm -f "${DESTDIR}/usr/lib/modules/${_kernver}/source"
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ln -sf "/${_hdrdir}" "${DESTDIR}/usr/lib/modules/${_kernver}/build"
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}
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