dolfin issue

[Sean Farley]

Gideon Simpson writes:

> I did a port uninstall and a port clean, and I got the same error.

Huh. I'll try to reproduce this, then.

> I do have petsc/slepc installed with mpich, if that’s part of the problem.  I suspect that petsc is built as a C library, while dolfin is C++.  Perhaps that’s the incompatibility?

It's perfectly fine to link C to C++. Dolfin has been doing this with
PETSc for years.