# FreeBSD Build Guide

**Updated for FreeBSD [15.0](https://www.freebsd.org/releases/15.0R/announce/)**

This guide describes how to build bitcoind, command-line utilities, and GUI on FreeBSD.

## Preparation

### 1. Install Required Dependencies
Run the following as root to install the base dependencies for building.

```bash
pkg install boost-libs cmake git libevent pkgconf
```

SQLite is required for the wallet:

```bash
pkg install sqlite3
```

To build Bitcoin Core without the wallet, use `-DENABLE_WALLET=OFF`.

Cap'n Proto is needed for IPC functionality (see [multiprocess.md](multiprocess.md)):

```bash
pkg install capnproto
```

Compile with `-DENABLE_IPC=OFF` if you do not need IPC functionality.

See [dependencies.md](dependencies.md) for a complete overview.

### 2. Clone Bitcoin Repo
Now that `git` and all the required dependencies are installed, let's clone the Bitcoin Core repository to a directory. All build scripts and commands will run from this directory.
```bash
git clone https://github.com/bitcoin/bitcoin.git
```

### 3. Install Optional Dependencies

#### GUI Dependencies
###### Qt6

Bitcoin Core includes a GUI built with the cross-platform Qt Framework. To compile the GUI, we need to install
the necessary parts of Qt, the libqrencode and pass `-DBUILD_GUI=ON`. Skip if you don't intend to use the GUI.

```bash
pkg install qt6-base qt6-tools
```

###### libqrencode

The GUI will be able to encode addresses in QR codes unless this feature is explicitly disabled. To install libqrencode, run:

```bash
pkg install libqrencode
```

Otherwise, if you don't need QR encoding support, use the `-DWITH_QRENCODE=OFF` option to disable this feature in order to compile the GUI.

---

#### Notifications
###### ZeroMQ

Bitcoin Core can provide notifications via ZeroMQ. To compile ZMQ support, install the following dependency and pass `-DWITH_ZMQ=ON` when configuring.
```bash
pkg install libzmq4
```

#### Test Suite Dependencies
There is an included test suite that is useful for testing code changes when developing.
To run the test suite (recommended), you will need to have Python 3 installed:

```bash
pkg install python3 databases/py-sqlite3 net/py-pyzmq
```
---

## Building Bitcoin Core

### 1. Configuration

There are many ways to configure Bitcoin Core, here are a few common examples:

##### Wallet and GUI:
This enables the GUI, assuming `sqlite` and `qt` are installed.
```bash
cmake -B build -DBUILD_GUI=ON
```

Run `cmake -B build -LH` to see the full list of available options.

##### No Wallet or GUI
```bash
cmake -B build -DENABLE_WALLET=OFF
```

### 2. Compile

```bash
cmake --build build     # Append "-j N" for N parallel jobs.
ctest --test-dir build  # Append "-j N" for N parallel tests.
```
