Fix #ifdef guards around METIS usage in EigenSparse backend and tests Change-Id: Idd1e0b7b1b2df2d402431b107dee0fa8e0fd58f5
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.