message: Updated gcc8 docker file.
diff: FROM axom/compilers:gcc-8
  +LABEL maintainer="white238@llnl.gov"
  +ARG branch=develop
  +SHELL ["/bin/bash", "-c"]
  RUN sudo apt-get update -y
  -RUN sudo apt-get install curl -fy
  -
  +RUN sudo apt-get install curl wget ssh pkg-config build-essential libopenblas-dev tar python3 -fy
  RUN sudo apt-get -qq install -y --no-install-recommends gfortran-7 && sudo update-alternatives --install /usr/bin/gfortran gfortran /usr/bin/gfortran-7 100
  +RUN sudo ln -f -s python3 /usr/bin/python # Compatibility with legacy Python
  -RUN git clone --recursive https://github.com/LLNL/axom.git
  +# Avoid building CMake from scratch
  +RUN wget https://cmake.org/files/v3.10/cmake-3.10.1-Linux-x86_64.sh
  +RUN sudo sh cmake-3.10.1-Linux-x86_64.sh --prefix=/usr --exclude-subdir
  -RUN git clone --recursive https://github.com/LLNL/RAJA.git
  +# Avoid building all MPICH3.3 dependencies from scratch - is there a xenial-compatible binary somewhere?
  +RUN wget http://www.mpich.org/static/downloads/3.3.2/mpich-3.3.2.tar.gz && tar xfz mpich-3.3.2.tar.gz
  +RUN cd mpich-3.3.2 && ./configure -prefix=/usr && make -j && sudo make install
  -WORKDIR "/home/axom/RAJA"
  -RUN mkdir build
  +RUN sudo useradd -m -s /bin/bash -G sudo axom
  -WORKDIR "/home/axom/RAJA/build"
  -RUN cmake ../. -DENABLE_TESTS=OFF
  -RUN make
  -RUN sudo make install
  +WORKDIR "/home/axom"
  +USER axom
  -WORKDIR "/home/axom/axom"
  -RUN ./scripts/uberenv/uberenv.py --spack-config-dir=./scripts/uberenv/spack_configs/docker --spec=%gcc@8.1.0 --prefix=/home/axom/axom_tpls -k
  +RUN git clone --recursive --branch $branch --single-branch --depth 1 https://github.com/LLNL/axom.git
  -WORKDIR "/home/axom"
  +# New containers will use Python3
  +RUN python3 ./axom/scripts/uberenv/uberenv.py --spack-config-dir=./axom/scripts/uberenv/spack_configs/docker/ubuntu16/ --project-json=./axom/scripts/uberenv/project.json \
  + --spec=%gcc@8.1.0 --prefix=/home/axom/serac_tpls -k
  +
  +# Make sure the new hostconfig worked
  +RUN cd axom && python3 config-build.py -hc *.cmake -bp build && cd build && make -j && make -j test
  +
  +RUN mkdir -p /home/axom/export_hostconfig
  +RUN cp ./axom/*.cmake /home/axom/export_hostconfig
  RUN rm -rf axom
  +RUN rm -rf axom_tpls/builds
  +
  