Add absl/log/vlog_is_on.h when using VLOG_IS_ON Previously this header was included in absl/log/log.h but going forward this header will not be included. Change-Id: Ie663b221d90e32a852fb00dfe20f731dcd1dcf6b
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.