# Installation instructions for nextpnr with ECP5 support

## Setting up new debootstrap and chroot into it

Run the following if you wish to isolate the nextpnr-ecp5 build
from other software (reproducible builds) or use the schroot
auto-preparation script here:
<https://git.libre-soc.org/?p=dev-env-setup.git;a=blob;f=mk-deb-chroot;hb=HEAD>

    export MY_CHROOT=/stable-chroot
    mkdir $MY_CHROOT
    debootstrap stable $MY_CHROOT http://deb.debian.org/debian/
    mount -t proc proc $MY_CHROOT/proc
    mount -t sysfs sysfs $MY_CHROOT/sys
    mount -t devpts devpts $MY_CHROOT/dev/pts/
    chroot $MY_CHROOT /bin/bash

## Steps to compile Project Trellis

### Necessary software to install

    apt-get install git
    apt-get install python3 python3-dev clang cmake libboost-dev \
                    libboost-filesystem-dev libboost-thread-dev \
                    libboost-program-options-dev libboost-iostreams-dev \
                    openocd
    git clone --recursive https://github.com/YosysHQ/prjtrellis

### Build Project Trellis

    cd prjtrellis
    cd libtrellis
    cmake -DCMAKE_INSTALL_PREFIX=/usr/local/libtrellis .
    make
    make install

## Steps to compile Project Nextpnr with ECP5

### Necessary software to install

    apt-get install libeigen3-dev
    git clone --recursive https://github.com/YosysHQ/nextpnr

### Build Project nextpnr-ecp5

    cd nextpnr
    cmake -DCMAKE_INSTALL_PREFIX=/usr/local/nextpnr-ecp5 \
          -DARCH=ecp5 -D TRELLIS_INSTALL_PREFIX=/usr/local/libtrellis .
    make
    make install

Please adjust the install paths for nextpnr and previous prjtrellis.