# Installation instructions for Verilator

## Setting up new debootstrap and chroot into it

Run the following if you wish to isolate the verilator 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/verilator
    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 Verilator

### Necessary software to install

    apt-get install git build-essential g++ ccache
    apt-get install python3 make autoconf flex bison \
                    libgoogle-perftools-dev perl-doc \
                    numactl zlibc zlib1g-dev

### Build Verilator

    git clone https://github.com/verilator/verilator
    cd verilator
    git checkout v4.106
    autoconf
    ./configure
    make -j$(nproc)
    make install

Please adjust the install paths for verilator.