I have a Fortran 2003 based code with MPI. I have compiled Openmpi 1.6.1 from souce with Intel 2013 and try to compile my code. Without using MPI (using fake mpi subroutines) everything works fine. However, when I use MPI commands, for the last files the ifort freezes or it compiles very very slow.
Any hint what might be the problem?