Version 5.7.1 is available upstream. Please consider updating!
It seems that version 5.7.1 is available upstream, while the latest version in the Gentoo tree is 5.6.17. You think this warning is false? Read more about it here.
SYMPHONY is a generic mixed-integer linear programs
(MILP) solver, callable library, and extensible framework for implementing
customized solvers. SYMPHONY has a number of advanced capabilities,
including the ability to solve multi-objective MILPs, the ability to
warm start its solution procedure.
SYMPHONY is part of the larger COIN-OR initiative (Computational
Infrastructurefor Operations Research).