$ ldd -r libarmadillo.so
    linux-vdso.so.1 =>  (0x00007ffdd8b61000)
    libopenblas.so.0 => /blues/gpfs/home/software/spack/opt/spack/linux-centos6-x86_64/gcc-6.1.0/openblas-0.2.18-avx2mvh76o62v5a2dr5u6zz2ewer5p7w/lib/libopenblas.so.0 (0x00002b8a88ba1000)
    libstdc++.so.6 => /blues/gpfs/home/software/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/lib64/libstdc++.so.6 (0x00002b8a89b7f000)
    libm.so.6 => /lib64/libm.so.6 (0x00002b8a89f16000)
    libgcc_s.so.1 => /blues/gpfs/home/software/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/lib64/libgcc_s.so.1 (0x00002b8a8a19a000)
    libc.so.6 => /lib64/libc.so.6 (0x00002b8a8a3b1000)
    /lib64/ld-linux-x86-64.so.2 (0x00002b8a886f1000)
    libpthread.so.0 => /lib64/libpthread.so.0 (0x00002b8a8a745000)
    libgfortran.so.3 => /blues/gpfs/home/software/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/lib64/libgfortran.so.3 (0x00002b8a8a963000)
    libquadmath.so.0 => /blues/gpfs/home/software/spack/opt/spack/linux-x86_64/gcc-5.3.0/gcc-6.1.0-q2zosj3igepi3pjnqt74bwazmptr5gpj/lib64/../lib64/libquadmath.so.0 (0x00002b8a8ac8a000)
undefined symbol: zvout_    (./libarmadillo.so)
undefined symbol: dvout_    (./libarmadillo.so)
undefined symbol: cvout_    (./libarmadillo.so)
undefined symbol: dmout_    (./libarmadillo.so)
undefined symbol: smout_    (./libarmadillo.so)
undefined symbol: cmout_    (./libarmadillo.so)
undefined symbol: svout_    (./libarmadillo.so)
undefined symbol: zmout_    (./libarmadillo.so)
undefined symbol: ivout_    (./libarmadillo.so)