[Gretl-users] multivariate lrvar?

Hi everybody, I'm wondering how to achieve something that would be the multivariate generalization of the lrvar function (long-run variance of a series). I know how I could do it "from scratch", so this is not a question of how to construct it from the raw variables. Instead I want to avoid reinventing the wheel and ideally also have something reasonably efficient. Does the "ghosts" package for multivariate spectra contain something useful? (jack?) Or any other function package? thanks, sven