Arbitrary Precision computation with complex numbers

[Ish Dhand]

I'm to start using c++ for computations that would need:
1. Arbitrary precision (something like what is provided by MP library)
2. Complex Number support (MPC library)
3. Linear Algebra operations like daigonalization, matrix decomposition, etc. for arbitrary precision complex numbers. (LAPACK or Eigen libraries)

What is a good way to work with both libraries together (use LAPACK code for MPC arbitrary precision complex numbers)?

Thanks!