# Installation instructions for Icarus Verilog

## Setting up new debootstrap and chroot into it

Run the following if you wish to isolate the iverilog 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=/opt/chroot/iverilog
    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

The dev-env-setup chroot script is a little more sophisticated
than the above

## Steps to compile Icarus Verilog

### Necessary software to install

    apt-get install git autoconf make g++ bison flex gperf libreadline6-dev

### Build Icarus Verilog

    git clone https://github.com/steveicarus/iverilog.git

    cd iverilog
    git checkout v11_0
    sh autoconf.sh
    ./configure --prefix=/usr/local/iverilog
    make -j$(nproc)
    make check
    make install

Please adjust the install paths for iverilog.