IMO there's too many things to get right and no easy standard way of doing it. Is there at least a checklist? It should ideally be automated. IIRC there's some

IMO there's too many things to get right and no easy standard way of doing it. Is there at least a checklist? It should ideally be automated. IIRC there's some library, maybe BLAS, that at compile time computes some machine-specific constants and also refuses to do it if a few things are not right.