I've fully switched over ot using mbed compile tools on mbed-cli, which does drastically simplify the GCC compile process. In my most recent update, which I have now tagged v1 on the stm32_discovery_mbed repository, I have the LED control of the discovery board over BLE. This code was copied from another repository, and took a little finagling to get it to work. Turns out, a lot of the newer mbed-os compile scripts run on python3, since python 2 is deprecated.
I decided to create a Dockerfile which allows others to compile the code with the same environment. Ultimately, there is a messy step which requires copying over a \"tools\" folder to replace the one from the outdated mbed-os version.
\nAs you can see from the Dockerfile I have (copied below), I am following the mbed recommended Dockerfile build, but I needed to add an additional line command in my fixes.sh bash script to overwrite the outdated compile script.
# ------------------------------------------------------------------------------\n# Pull base image\nFROM ubuntu:20.04\n\n\n# ------------------------------------------------------------------------------\n# Arguments\nARG WORKDIR=/root\nARG MBED_OS_VER=master\n\n# ------------------------------------------------------------------------------\n# Install tools via apt\nENV DEBIAN_FRONTEND=noninteractive\nRUN apt -y update && \\\n apt -y install git \\\n wget \\\n python3 \\\n python3-dev \\\n python3-setuptools \\\n python3-usb \\\n python3-pip \\\n software-properties-common \\\n build-essential \\\n cmake \\\n astyle \\\n mercurial \\\n ninja-build \\\n libssl-dev \\\n cargo \\\n && apt clean && rm -rf /var/lib/apt/lists\n\n# Cmake (Mbed OS requires >=3.19.0-rc3 version which is not available in Ubuntu 20.04 repository)\nRUN set -x \\\n && (cd /tmp \\\n && [ \"$(uname -m)\" = \"aarch64\" ] && \\\n CMAKE_SCRIPT=\"cmake-3.19.3-Linux-aarch64.sh\" || \\\n CMAKE_SCRIPT=\"cmake-3.19.3-Linux-x86_64.sh\" \\ \n && wget --progress=dot:giga https://github.com/Kitware/CMake/releases/download/v3.19.3/${CMAKE_SCRIPT} \\\n && sh ${CMAKE_SCRIPT} --exclude-subdir --prefix=/usr/local \\\n && rm -rf ${CMAKE_SCRIPT}) \\\n && exec bash \\\n && : # last line\n\n# ------------------------------------------------------------------------------\n# Install Python modules (which are not included in requirements.txt)\nRUN pip3 install -U \\\n mbed-cli \\\n mbed-tools\n\n# Set up mbed environment\nWORKDIR /tmp/\nRUN wget https://github.com/ARMmbed/mbed-os/raw/${MBED_OS_VER}/requirements.txt && \\\n pip3 install -r requirements.txt && \\\n rm requirements.txt\n\n# ------------------------------------------------------------------------------\n# Install arm-none-eabi-gcc\nWORKDIR /opt/mbed-os-toolchain\nRUN [ \"$(uname -m)\" = \"aarch64\" ] && \\\n TARBALL=\"gcc-arm-none-eabi-9-2019-q4-major-aarch64-linux.tar.bz2\" || \\\n TARBALL=\"gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2\" && \\\n wget -q https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/RC2.1/${TARBALL} && \\\n tar -xjf ${TARBALL} && \\\n rm ${TARBALL}\n\n# ------------------------------------------------------------------------------\n# Configure mbed build system\nRUN set -x \\\n && mbed config -G GCC_ARM_PATH /opt/mbed-os-toolchain/gcc-arm-none-eabi-9-2019-q4-major/bin/ \\\n && mbed toolchain -G -s GCC_ARM \\\n && : # last line\n\n# ------------------------------------------------------------------------------\n# Configure environment variables\nENV MBED_GCC_ARM_PATH=/opt/mbed-os-toolchain/gcc-arm-none-eabi-9-2019-q4-major/bin/\nENV PATH=\"${PATH}:${MBED_GCC_ARM_PATH}\"\n\n# ------------------------------------------------------------------------------\n# Display and save environment settings\nRUN python3 --version | tee env_settings && \\\n arm-none-eabi-gcc --version | tee -a env_settings && \\\n (echo -n 'mbed-cli ' && mbed --version) | tee -a env_settings && \\\n (echo -n 'mbed-greentea ' && mbedgt --version) | tee -a env_settings && \\\n (echo -n 'mbed-host-tests ' && mbedhtrun --version) | tee -a env_settings && \\\n (echo -n 'mbed-tools ' && mbed-tools --version) | tee -a env_settings\n\nWORKDIR /work\n\n# Copy all files into a directory called \"work\"\nADD . /work\n\n# Run fixes.sh, which replaces the \"tools\" folder with an updated folder\nRUN chmod u+x fixes.sh && \\\n ./fixes.sh\nNext steps: add in sensor readings to BLE, try upgrading to the latest Mbed-OS
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