overthinkos/build-toolchain
coder/skills/build-toolchain/SKILL.md
C/C++ build toolchain with gcc, cmake, autoconf, ninja, git, and pkg-config. Use when working with native compilation, build tools, or C/C++ development.
tools
Updated May 24, 2026
$ install --global
skillsauthnpx skillsauth add overthinkos/overthink-plugins build-toolchainInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- build-toolchain
- description:
- |
build-toolchain -- C/C++ compilation toolchain
Layer Properties
| Property | Value |
|----------|-------|
| Install files | layer.yml (packages only) |
Environment Variables
| Variable | Value |
|----------|-------|
| CCACHE_DISABLE | 1 |
Packages (41 total, grouped by purpose)
The package list is the centralized place to add system libraries that any builder stage needs. Image-specific cargo deps live here when they're broadly useful; truly image-specific deps stay in their image's own layer.
1. Generic C/C++ build tools (21)
autoconf, automake, binutils, bison, ccache, cli11-devel, cmake, flex,
gcc, gcc-c++, gdb, git, glibc-devel, libtool, make, ninja-build, patch,
pkgconf, pkgconf-m4, pkgconf-pkg-config, redhat-rpm-config, rpm-build, rpm-sign.
2. Rust toolchain (2)
rust, cargo. Used by setuptools-rust and any layer that compiles a Smithay-based
Wayland compositor from source. See /ov-coder:rust for the disambiguation between
this builder-stage Rust and the runtime rust layer.
3. Bindgen runtime + assembler (2)
clang-devel — provides libclang.so, required by bindgen-based crates such as
x264-sys and ffmpeg-sys-next. Without it, those crates panic in their build.rs at
bindgen-0.72.1/lib.rs:616:27.
nasm — assembler for SIMD-accelerated native deps. The turbojpeg-sys crate vendors
libjpeg-turbo, whose CMake build calls enable_language(ASM_NASM) and fails without
nasm with No CMAKE_ASM_NASM_COMPILER could be found.
4. Smithay backend dev headers (10)
wayland-devel, libudev-devel, libxkbcommon-devel, mesa-libgbm-devel,
libseat-devel, libinput-devel, systemd-devel, libdrm-devel, pixman-devel,
libjpeg-turbo-devel.
These satisfy smithay's default feature set when pixelflux_wayland builds against
smithay = { rev = "ca932e04…" } with features
["backend_drm", "backend_egl", "backend_gbm", "backend_libinput", "backend_udev", "renderer_gl", "renderer_pixman", "use_system_lib", "desktop", "wayland_frontend"].
Each backend_* and renderer_* feature pulls a pkg-config lookup against the matching
-devel package at link time.
5. Codec dev libs from RPM Fusion free (3)
libva-devel, x264-devel, ffmpeg-devel.
These live in RPM Fusion free (not in the base Fedora repos), which is why
/ov-distros:fedora-builder now includes /ov-distros:rpmfusion before
build-toolchain in its layer list. They are required for compiling pixelflux's
libva-sys, x264-sys, and ffmpeg-sys-next cargo crates against the system
codec libraries.
See /ov-selkies:selkies (Patched pixelflux build pipeline) for the consumer story —
the selkies layer's build.sh clones pixelflux from a pinned commit, applies four
inline source patches, and runs pip install . against this builder stage.
Cross-distro coverage
rpm: (Fedora), pac: (Arch), deb: (Debian/Ubuntu) — full parity. The deb section maps Fedora's ~40 -devel packages to their Debian -dev equivalents (libclang-dev, libavformat-dev, libdrm-dev, libinput-dev, libturbojpeg0-dev, libseat-dev, libva-dev, libwayland-dev, libxkbcommon-dev, libgbm-dev, libsystemd-dev, libpixman-1-dev, libx264-dev, libudev-dev — plus build-essential). Drops on deb: redhat-rpm-config, rpm-build, rpm-sign, pkgconf-m4 (RPM-specific); cli11-devel (header-only, cmake FetchContent).
Usage
# image.yml
my-image:
layers:
- build-toolchain
Used In Images
/ov-distros:fedora-builder/ov-distros:arch-builder- Also used in
bazzite
Related Layers
/ov-languages:pixi— Sibling in builder images for conda-forge package builds/ov-coder:nodejs— Sibling in builder images for npm package builds/ov-tools:yay— Pairs in arch-builder for AUR builds/ov-coder:rust— Disambiguates the builder-stagerust+cargopackages here from the runtimerustlayer/ov-distros:rpmfusion— Must be applied before this layer in fedora-builder so codec dev libs (x264-devel,ffmpeg-devel) can install/ov-selkies:selkies— Primary consumer of all the new cargo/codec deps (Patched pixelflux build pipeline)
Related Commands
/ov-build:build— Multi-stage builders consume this layer for pixi/npm/cargo builds/ov-build:generate— See how builder stages are generated from this layer
When to Use This Skill
Use when the user asks about:
- C/C++ compilation inside containers
- Build tools (cmake, make, ninja, autoconf)
- Compiler toolchain setup
- The
build-toolchainlayer or its packages
Related
/ov-image:layer— layer authoring reference (layer.ymlschema, task verbs, service declarations)/ov-eval:eval— declarative testing (eval:block,ov eval image,ov eval live)
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