On Jul 28, 2011, at 11:55 AM, Jose E. Roman wrote: > We are getting an undefined reference `MPI_Exscan'. This function is used in > src/mat/impls/nest/matnest.c. > If I am not wrong, MPI_Exscan was introduced in MPI-2 but was not available > in the previous standard. Apparently, the machine where we are compiling is > very old and has MPI-1 only. > > I guess there should be a PETSC_HAVE_MPI_EXSCAN test in configure.
Correct, whoever used that MPI 2 function in PETSc is obligated to protect it. Barry > > Jose >
