Fix missing declaration warning Change-Id: I690b81af11bb98930d0a0d1c8d5d4d6d75f61bd3
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.