# YosysHQ/oss-cad-suite-build

Multi-platform nightly builds of open source digital design and verification tools

Repository: https://github.com/YosysHQ/oss-cad-suite-build
Canonical: https://ross.abutalabs.com/products/oss-cad-suite-build
Language: Shell
License: ISC
License Family: permissive
Last push: 2026-08-26T02:24:47+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 2039, "days_push": 8, "days_rel": 8, "gap_med": 1.0, "n_releases_24m": 721}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1663, forks 135 (observed 2026-08-28T04:05:18.779820+00:00)

## What it is
OSS CAD Suite is a multi-platform binary distribution of open-source digital logic design and verification tools, including Yosys, GHDL, ABC, Amaranth, and Migen. This repository contains the build scripts and nightly release infrastructure for producing those binaries across Linux, macOS, and Windows.

## Use cases
- install yosys and open source FPGA tools without building from source
- get a prebuilt Verilog synthesis and simulation toolchain for Linux, macOS, or Windows
- set up an open source digital design environment for Verilog, VHDL, Amaranth, or Migen
- download nightly binaries for RTL synthesis, formal verification, and FPGA place and route
- set up a CI pipeline for Verilog or VHDL verification using prebuilt tools
- program and test FPGAs using only open source software

## When to choose
- you need ready-to-use binaries of Yosys, GHDL, or related HDL tools without compiling them yourself
- you want a consistent, all-in-one open source digital design toolchain across multiple platforms
- you want recent nightly builds with the latest tool versions
- you are setting up FPGA or HDL workflows in CI or on machines without build toolchains

## When to avoid
- you need commercial-grade SystemVerilog, VHDL, or SVA support, which requires the proprietary Tabby CAD Suite
- you need to customize tool build flags or patch the tools themselves
- you only need a single tool and prefer installing it via your system package manager
- you require long-term-stable pinned releases rather than nightly snapshots

## Facets
- artifact type: application
- maturity: active
- function: developer-tools, compiler, testing, simulation
- domain: developer-tools, hardware, embedded-systems
- platform: windows, cross-platform, cli
- tags: fpga, verilog, vhdl, rtl-synthesis, formal-verification, yosys, hdl, digital-design, nightly-builds, toolchain, linux, macos

## Member repositories
- YosysHQ/oss-cad-suite-build (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:18.779820+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:44:31.208684+00:00, confidence not recorded.
  - readme: https://github.com/YosysHQ/oss-cad-suite-build (fetched 2026-08-28T04:05:18.779820+00:00, sha 2d09e089714d)
- Data as of 2026-08-30T08:39:29.467469+00:00.