So I'm trying to run LAMMPS on a single-core box, and am getting the
error that there are a bunch of undefined references to MPI functions,
ie MPI_Get_count or MPI_Rsend
I replaced the MPI lines in the g++3 makefile w/:
MPI_INC = -I../STUBS
MPI_LIB = ../STUBS/libmpi.a
I also went in and made the dummy MPI files in the make file.