The Ebuild sci-libs/fftw-3.0.1-r2 depends on lam-mpi, but lam-mpi is blocked by mpich2. sci-libs/fftw-3.0.1-r2 works with mpich2 if you compile it by hand.
(In reply to comment #0) > The Ebuild sci-libs/fftw-3.0.1-r2 depends on lam-mpi No it doesn't.