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gps/dependencies/chisel/SETUP.md
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2026-07-12 11:01:51 +03:00

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# Chisel Local Setup
Instructions for setting up your environment to run Chisel locally.
For a minimal setup, you only need to install [SBT (the Scala Build Tool)](http://www.scala-sbt.org), which will automatically fetch the appropriate version of Scala and Chisel based on on your project configuration.
[Firtool](https://github.com/llvm/circt) is required to generate Verilog.
[Verilator](https://www.veripool.org/wiki/verilator) is installation is required to simulate your Verilog designs.
## Ubuntu Linux
1. Install the JVM
```bash
sudo apt-get install default-jdk
```
1. Install sbt according to the instructions from [sbt download](https://www.scala-sbt.org/download.html).
1. Install Firtool
Choose whatever version is being [used in continuous integration](.github/workflows/install-circt/action.yml)
```bash
wget -q -O - https://github.com/llvm/circt/releases/download/firtool-1.38.0/firrtl-bin-ubuntu-20.04.tar.gz | tar -zx
```
This will give you a directory called `firtool-1.38.0` containing the firtool binary, add this to your PATH as appropriate.
```bash
export PATH=$PATH:$PWD/firtool-1.38.0/bin
```
Alternatively, you can install the binary to a standard location by simply moving the binary (if you have root access).
```bash
mv firtool-1.38.0/bin/firtool /usr/local/bin/
```
2. Install Verilator.
We currently recommend Verilator version v4.226.
Follow these instructions to compile it from source.
1. Install prerequisites (if not installed already):
```bash
sudo apt-get install git make autoconf g++ flex bison
```
2. Clone the Verilator repository:
```bash
git clone https://github.com/verilator/verilator
```
3. In the Verilator repository directory, check out a known good version:
```bash
git pull
git checkout v4.226
```
4. In the Verilator repository directory, build and install:
```bash
unset VERILATOR_ROOT # For bash, unsetenv for csh
autoconf # Create ./configure script
./configure
make
sudo make install
```
## Arch Linux
1. Install Verilator and SBT
```bash
pacman -Sy verilator sbt
```
1. Install firtool
See the instructions for Ubuntu above, the firtool Ubuntu binary is a "many Linux" mostly statically linked binary.
## Windows
1. [Download and install sbt for Windows](https://www.scala-sbt.org/download.html).
Verilator does not appear to have native Windows support.
However, Verilator works in [WSL](https://docs.microsoft.com/en-us/windows/wsl/install-win10) or in other Linux-compatible environments like Cygwin.
There are no issues with generating Verilog from Chisel, which can be pushed to FPGA or ASIC tools.
## Mac OS X
1. Install Verilator and SBT
```bash
brew install sbt verilator
```
1. Install firtool
```bash
wget -q -O - https://github.com/llvm/circt/releases/download/firtool-1.38.0/firrtl-bin-macos-11.tar.gz | tar -zx
```
This will give you a directory called `firtool-1.38.0` containing the firtool binary, add this to your PATH as appropriate.
```bash
export PATH=$PATH:$PWD/firtool-1.38.0/bin
```
Alternatively, you can install the binary to a standard location by simply moving the binary.
```bash
mv firtool-1.38.0/bin/firtool /usr/local/bin/
```