Here is a list of all macros with links to the files they belong to:

• MPI_Comm : quadgrid_cpp.h
• MPI_Comm_rank : quadgrid_cpp.h
• MPI_Comm_size : quadgrid_cpp.h
• MPI_COMM_WORLD : quadgrid_cpp.h
• MPI_Initialized : quadgrid_cpp.h