Fix errors found by -Werror "'const' type qualifier on return type has no effect" is one of the errors, and an unused parameter for another. Change-Id: Ib4bc245d992c1fc1bea0b25d5396871ca1df8411
Ceres Solver is an open source C++ library for modeling and solving large, complicated optimization problems. It is a feature rich, mature and performant library which has been used in production at Google since 2010. Ceres Solver can solve two kinds of problems.
Please see ceres-solver.org for more information.