anchor.diff:  
   RUN update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-7 90
   RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 90
  -RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gstreamer1.0-libav
   RUN mkdir -p /app
   
   ADD . /app
  
positive.code:   libffi-dev \
    libmount-dev
  
  ENV MMCOMMON=0.9.10 SIGC=2.9.1 GLIB=2.50.1 GLIBMM=2.50.1 SPDLOG=0.16.3 CMAKE=3.10.3 GTEST=1.8.0
  
  RUN curl -o /root/mm-common.tar.gz -SL https://github.com/GNOME/mm-common/archive/${MMCOMMON}.tar.gz && \
      cd /root && \
  
negative.code:   libgstreamer1.0-dev \
    libgstreamer-plugins-base1.0-dev \
    libgstreamer-plugins-bad1.0-dev \
    gstreamer1.0-libav \
    libwebkitgtk-3.0-dev \
    gstreamer1.0-tools \
    mesa-common-dev \
    libgl1-mesa-dev \
  