[petsc-dev] MPI_Exscan

Jose E. Roman jroman at dsic.upv.es
Thu Jul 28 11:55:32 CDT 2011

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.


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