Wiki page compilation instructions - MPI required?

[NRJank]

was following the build instructions in the wiki. the package requirements make it sound like an MPI is optional if you plan to build with MPI enabled using the pre-cache file line mentioned further down the page. However even without that line, or with that line present but set to FALSE, compilation halted if it couldn't find MPI libraries. not sure if this is intended, but perhaps bullet 1 should have MPI library listed as a requirement.