Build failing due to inability to find `Eigen/Core`.

[atomoclast]

Hi,

I am trying to build this package, and I'm having a hard time with this error:

 #include <Eigen/Core>

I can't see why it wouldn't work. I checked my /usr/include path and I definitely have Eigen:

/usr/include/eigen3/Eigen$ ls

Array           Eigenvalues             MetisSupport     SparseCholesky  StdList
Cholesky        Geometry                OrderingMethods  SparseCore      StdVector
CholmodSupport  Householder             PardisoSupport   SparseLU        SuperLUSupport
Core            IterativeLinearSolvers  PaStiXSupport    SparseQR        SVD
Dense           Jacobi                  QR               SPQRSupport     UmfPackSupport
Eigen           LeastSquares            QtAlignedMalloc  src
Eigen2Support   LU                      Sparse           StdDeque

Anyone have any idea? Or had this problem?

[IgorRusak]

You used Eigen3. Try to changes in CMakeLists: find_package(Eigen3 REQUIRED) and ${EIGEN3_INCLUDE_DIR}