docker: Add Dockerfiles for images needed by AWS gitlab-runners

The built images are set up with fairly recent versions of gcc and
clang:

  - centos_7:     [ gcc@5.5.0 (built from src), clang@6.0.0 (spack-built from src) ]
  - ubuntu_18.04: [ gcc@5.5.0 (system), clang@6.0.0-1ubuntu2 (system) ]

3 files changed, 118 insertions, 0 deletions

diff --git a/share/spack/docker/spack_builder/Dockerfile-spack_builder_centos_7 b/share/spack/docker/spack_builder/Dockerfile-spack_builder_centos_7
new file mode 100644
index 0000000000..a10e9369be
--- /dev/null
+++ b/share/spack/docker/spack_builder/Dockerfile-spack_builder_centos_7
@@ -0,0 +1,61 @@
+
+#
+# To build this image:
+#
+# cd <path-to-spack-repo>/share/spack/docker/spack_builder
+# docker build -f Dockerfile-spack_builder_centos_7 -t spack_builder_centos_7 .
+#
+
+from spack/centos:7
+
+RUN yum update -y          && \
+    yum install -y            \
+        gmp-devel             \
+        libmpc-devel          \
+        mpfr-devel            \
+        vim                   \
+        which              && \
+    rm -rf /var/cache/yum && yum clean all
+
+# Download, build and install gcc 5.5.0
+RUN mkdir -p /home/spackuser/Download/gcc550/build-gcc550            && \
+    mkdir -p /opt/gcc/gcc-5.5.0                                      && \
+    cd /home/spackuser/Download/gcc550                               && \
+    curl -OL https://ftp.gnu.org/gnu/gcc/gcc-5.5.0/gcc-5.5.0.tar.xz  && \
+    tar -xvf gcc-5.5.0.tar.xz                                        && \
+    cd build-gcc550                                                  && \
+    ../gcc-5.5.0/configure                                              \
+        --enable-languages=c,c++,fortran                                \
+        --disable-multilib                                              \
+        --prefix=/opt/gcc/gcc-5.5.0                                  && \
+    make -j$(nproc)                                                  && \
+    make install                                                     && \
+    cd /home/spackuser                                               && \
+    rm -rf /home/spackuser/Download
+
+RUN export PATH=/spack/bin:$PATH              && \
+    spack compiler find /opt/gcc/gcc-5.5.0
+
+RUN sed -i 's/f77: null/f77: \/opt\/gcc\/gcc-5.5.0\/bin\/gfortran/g;s/fc: null/fc: \/opt\/gcc\/gcc-5.5.0\/bin\/gfortran/g' ~/.spack/linux/compilers.yaml
+
+RUN mkdir -p /home/spackuser/spackcommand
+
+COPY update_rpaths.py /home/spackuser/spackcommand/update_rpaths.py
+
+RUN spack python /home/spackuser/spackcommand/update_rpaths.py  \
+        --prefix /opt/gcc/gcc-5.5.0                             \
+        --rpaths /opt/gcc/gcc-5.5.0/lib64
+
+RUN export PATH=/spack/bin:$PATH              && \
+    spack install -y llvm@6.0.0%gcc@5.5.0     && \
+    spack clean -a
+
+RUN export PATH=/spack/bin:$PATH                                     && \
+    spack compiler find $(spack location -i llvm@6.0.0%gcc@5.5.0)
+
+RUN sed -i 's/f77: null/f77: \/opt\/gcc\/gcc-5.5.0\/bin\/gfortran/g;s/fc: null/fc: \/opt\/gcc\/gcc-5.5.0\/bin\/gfortran/g' ~/.spack/linux/compilers.yaml
+
+RUN spack python /home/spackuser/spackcommand/update_rpaths.py  \
+        --prefix /spack/opt/spack/linux-centos7-x86_64/gcc-5.5.0/llvm-6.0.0-awfpo7kn3k24weu655rrt2erihzd4gii                             \
+        --rpaths /spack/opt/spack/linux-centos7-x86_64/gcc-5.5.0/llvm-6.0.0-awfpo7kn3k24weu655rrt2erihzd4gii/lib
+
diff --git a/share/spack/docker/spack_builder/Dockerfile-spack_builder_ubuntu_18.04 b/share/spack/docker/spack_builder/Dockerfile-spack_builder_ubuntu_18.04
new file mode 100644
index 0000000000..417a11f932
--- /dev/null
+++ b/share/spack/docker/spack_builder/Dockerfile-spack_builder_ubuntu_18.04
@@ -0,0 +1,23 @@
+
+#
+# To build this image:
+#
+# cd <path-to-spack-repo>/share/spack/docker/spack_builder
+# docker build -f Dockerfile-spack_builder_ubuntu_18.04 -t spack_builder_ubuntu_18.04 .
+#
+
+from spack/ubuntu:bionic
+
+RUN apt-get -yqq update && apt-get -yqq install \
+        clang                                   \
+        g++-5                                   \
+        gcc-5                                   \
+        gfortran-5                              \
+        unzip                                   \
+        vim                                  && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN export PATH=/spack/bin:$PATH             && \
+    spack compiler find gcc clang
+
+RUN sed -i 's/f77: null/f77: \/usr\/bin\/gfortran/g;s/fc: null/fc: \/usr\/bin\/gfortran/g' ~/.spack/linux/compilers.yaml
diff --git a/share/spack/docker/spack_builder/update_rpaths.py b/share/spack/docker/spack_builder/update_rpaths.py
new file mode 100644
index 0000000000..110e2f9fa6
--- /dev/null
+++ b/share/spack/docker/spack_builder/update_rpaths.py
@@ -0,0 +1,34 @@
+# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+import argparse
+from spack.config import config as spack_config
+
+
+def update_compiler(prefix, rpaths):
+    compilers_config = spack_config.get('compilers')
+
+    for compiler_entry in compilers_config:
+        if compiler_entry['compiler']['paths']['cc'].startswith(prefix):
+            print('found target compiler: {0}'.format(
+                compiler_entry['compiler']['spec']))
+            compiler_entry['compiler']['extra_rpaths'].append(rpaths)
+
+    spack_config.update_config('compilers', compilers_config)
+
+
+if __name__ == "__main__":
+    # Create argument parser
+    parser = argparse.ArgumentParser(
+        description="Add extra_rpaths to default system compilers.yaml")
+
+    parser.add_argument('-p', '--prefix', default=None,
+                        help="Install prefix of compiler to update")
+    parser.add_argument('-r', '--rpaths', default=None,
+                        help="Extra rpaths to add to target compiler")
+
+    args = parser.parse_args()
+
+    update_compiler(args.prefix, args.rpaths)