Fix Ubuntu 20.04 SPQR build Fixes #764 Change-Id: I045eb6653749d8a09f4aeb617163288cbf92ad56
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.