# Use Ubuntu 18.04 as the base image
FROM ubuntu:18.04

# Update the package list and install basic development tools
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
        build-essential \
        software-properties-common \
        wget \
        curl \
        git

# Install CMake
RUN apt-get install -y --no-install-recommends cmake

# Set the URL and installation path for the Linaro toolchain
ARG LINARO_URL="https://releases.linaro.org/components/toolchain/binaries/6.3-2017.05/aarch64-linux-gnu/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu.tar.xz"
ARG TOOLCHAIN_PATH="/opt/linaro-toolchain"

# Create the installation path, download, and extract the Linaro toolchain
RUN mkdir -p ${TOOLCHAIN_PATH} && \
    wget -qO- ${LINARO_URL} | tar -xJ -C ${TOOLCHAIN_PATH} --strip-components=1

# Set environment variables to point to the toolchain directory
ENV ARM_CROSS_COMPILE_TOOLCHAIN=${TOOLCHAIN_PATH}
ENV PATH="${TOOLCHAIN_PATH}/bin:${PATH}"

# Clean temporary files to reduce image size
RUN apt-get clean && \
    rm -rf /var/lib/apt/lists/*

# Set the working directory
WORKDIR /workspace

# Default to running Bash
CMD ["/bin/bash"]