Error

[  1%] Building CXX object src/shogun/CMakeFiles/libshogun.dir/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp.o
/home/nikolisgal/gitRepository/shogun/src/shogun/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp: In constructor ‘shogun::CLogDetEstimator::CLogDetEstimator(shogun::SGSparseMatrix<double>)’:
/home/nikolisgal/gitRepository/shogun/src/shogun/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp:53:2: error: ‘CLanczosEigenSolver’ was not declared in this scope
  CLanczosEigenSolver* eig_solver=new CLanczosEigenSolver(op);
  ^
/home/nikolisgal/gitRepository/shogun/src/shogun/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp:53:23: error: ‘eig_solver’ was not declared in this scope
  CLanczosEigenSolver* eig_solver=new CLanczosEigenSolver(op);
                       ^
/home/nikolisgal/gitRepository/shogun/src/shogun/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp:53:38: error: expected type-specifier before ‘CLanczosEigenSolver’
  CLanczosEigenSolver* eig_solver=new CLanczosEigenSolver(op);
                                      ^
/home/nikolisgal/gitRepository/shogun/src/shogun/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp:53:38: error: expected ‘;’ before ‘CLanczosEigenSolver’
make[2]: *** [src/shogun/CMakeFiles/libshogun.dir/mathematics/linalg/ratapprox/logdet/LogDetEstimator.cpp.o] Error 1
make[1]: *** [src/shogun/CMakeFiles/libshogun.dir/all] Error 2
make: *** [all] Error 2
[nikolisgal@localhost build]$