# Installing Hush

Instructions to compile Hush yourself.

## Swap Space (Optional)
You will need at least 4GB of RAM to build hush from git source, OR you can
enable a swap file. To enable a 4GB swap file on modern Linux distributions:

```sh
sudo fallocate -l 4G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
```

## Build on Debian/Ubuntu:

```sh
# install build dependencies
sudo apt-get install build-essential pkg-config libc6-dev m4 g++-multilib \
      autoconf libtool ncurses-dev unzip git zlib1g-dev wget \
      bsdmainutils automake curl unzip nano libsodium-dev cmake
# clone git repo
git clone https://git.hush.is/hush/hush3
cd hush3
# Build
# This uses 3 build processes, you need 2GB of RAM for each. 
./build.sh -j3
```

## Build on Arch:

```sh
# install build dependencies
sudo pacman -S gcc libsodium lib32-zlib unzip wget git python rust curl autoconf cmake
# clone git repo
git clone https://git.hush.is/hush/hush3
cd hush3
# Build
# This uses 3 build processes, you need 2GB of RAM for each. 
./build.sh -j3
```

## Build on Fedora:

```sh
# install build dependencies
sudo dnf install make automake gcc gcc-c++ kernel-devel cmake libtool ncurses-devel patch -y
# clone git repo
git clone https://git.hush.is/hush/hush3
cd hush3
# Build
# This uses 3 build processes, you need 2GB of RAM for each. 
./build.sh -j3
```

### Building On Ubuntu 16.04 and older systems

Some older compilers may not be able to compile modern code, such as gcc 5.4 which comes with Ubuntu 16.04 by default. Here is how to install gcc 7 on Ubuntu 16.04. Run these commands as root:

```
add-apt-repository ppa:ubuntu-toolchain-r/test && \
apt update && \
apt-get install -y gcc-7 g++-7 && \
  update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 60 && \
  update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60
```

### Build on Mac

These instructions are a work in progress. Please report issues to https://hush.is/tg_support

```
sudo port update
sudo port upgrade outdated
sudo port install qt5

# clone git repo
git clone https://git.hush.is/hush/hush3
cd hush3
# Build
# This uses 3 build processes, you need 2GB of RAM for each. 
./build.sh -j3
```

## Run a HUSH Node

After you have compiled Hush, then you can run it with the following command:

```sh
./src/hushd
```

## Windows (cross-compiled on Linux)
Get dependencies:
```ssh
sudo apt-get install \
      build-essential pkg-config libc6-dev m4 g++-multilib libdb++-dev \
      autoconf libtool ncurses-dev unzip git zip \
      zlib1g-dev wget bsdmainutils automake mingw-w64 cmake libsodium-dev
```

Downloading Git source repo, building and running Hush:

```sh
# pull
git clone https://git.hush.is/hush/hush3
cd hush3
# Build
./util/build-win.sh -j$(nproc)
# Run a HUSH node
./src/hushd
```

## ARM Architecture

Currently, any ARMv7 machine will not be able to build this repo, because the
underlying tech (zcash and the zksnark library) do not support that instruction
set.

This also means that old RaspberryPi devices will not work, unless they have a
newer ARMv8-based Raspberry Pi. Raspberry Pi 4 and newer are known to work.
