This provides an Eigen implementation for ecl's linear algebra.
This is a package that stores the eigen header files. You can either use it directly, or better still, interface it through ecl_linear_algebra which provides a few extra features.
Currently using version 3.01 and also includes the unsupported modules.
I had to edit the Eigen3/src/StlSupport headers to dereference correctly (they're hardcoded to Eigen paths).