[firedrake] clapack.h

Dear Firedrakers, David has been helping me by implementing a way of assembling the inverse of a local tensor. This involves calling LAPACK routines, and we realised that the big problem is how to locate clapack, and how to link against it. The only approach we could think of was that scipy.linalg.lapack builds a clapack.so. Then, we could make our own header file that contains the interfaces to the LAPACK routines that we want to use, and compile aginst clapack.so. We really don't want to replicate some kind of CMAKE approach to locating libraries for COFFEE. What is the best way to do this? cheers --cjc