Dockerfile

# Use 32-bit Ubuntu 18.04 base for x86 build
FROM i386/ubuntu:18.04

ENV DEBIAN_FRONTEND=noninteractive

# Install all build dependencies
RUN dpkg --add-architecture i386 && apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    git \
    wget \
    curl \
    ca-certificates \
    python3 \
    python3-pip \
    unzip \
    bc \
    bison \
    flex \
    libssl-dev \
    libncurses5-dev \
    pkg-config \
    libusb-1.0-0-dev \
    u-boot-tools \
    device-tree-compiler \
    dfu-util \
    zlib1g-dev \
    qemu-user-static \
    coreutils \
    gcc-multilib \
    perl \
    perl-modules \
 && apt-get clean && rm -rf /var/lib/apt/lists/*

WORKDIR /src

CMD ["/bin/bash"]