Version 1.5 is available upstream. Please consider updating!
It seems that version 1.5 is available upstream, while the latest version in the Gentoo tree is 1.4. You think this warning is false? Read more about it here.
MPFIT uses the Levenberg-Marquardt technique to solve the
least-squares problem. In its typical use, MPFIT will be used to fit
a user-supplied function (the "model") to user-supplied data points
(the "data") by adjusting a set of parameters. MPFIT is based upon
MINPACK-1 (LMDIF.F) by More' and collaborators.