OPM/opm-autodiff — pull request #28 by rolk (2013-09-02 08:10:00+00:00)
Title: Improve detection of the Eigen3 library

Two new scenarios are now supported:

1. You have an `eigen3` source tree checked out next to the `opm-autodiff` source tree.

2. You give the location to an `eigen3` "build" tree (meaning a directory where you have run `cmake «path-to-eigen3-source»`) in the variable `EIGEN3_ROOT`.