Develop build infrastructure

[aidanheerdegen]

Develop spack based build infrastructure.

[aidanheerdegen]

ParallelIO (PIO) is a significant dependency for CICE. It is already supported by spack.

The spack package file for PIO is a useful source of information for configuring other CMake based spack builds

https://github.com/spack/spack/blob/60997a7bc34616406e331a2919deec0bd36893a3/var/spack/repos/builtin/packages/parallelio/package.py

specifically regarding configuring options and passing information through to the CMake build. It also uses MPI, so the MPI dependency details are useful too.

ping @harshula

[harshula]

PR: ACCESS-NRI/spack-packages#8

[harshula]

Minimal changes required to cice5: #5

[harshula]

To compile with GCC, we need the following fix to the cice5 source package: #6