Can a compiled GA library be used to detect its compile-time ARMCI setting?

[srk]

I'm wondering if it possible to write code that detects some library metadata, specifically the ARMCI compile-time setting used to compile GA libraries. I need to be able to detect programmatically if MPI-PR has been specified when the GA library was compiled.

[jeffhammond]

There may be a better way, but at least with MPI-PR, you should be able to compare int np = GA_Nnodes() to MPI_Comm_size(MPI_COMM_WORLD, &size). For MPI-PR, they should not be equal (np != size).

ARMCI-MPI with Casper underneath does a similar trick to MPI-PR but intercepts all the MPI symbols so the two queries about will produce the same output.