[OSM-dev] Code for OSTN02?

[TimSC]

Hi all,

Does anyone know a linux compatible C or C++ implementation of OSTN02? 
(that is the fancy OS grid to ETRS89 which is a local version of WGS84).

I need it to run under linux which rules out the OS implementation. I am 
currently using Geo-Coordinates-OSGB-2.04 in perl and although it works 
fine, it would be a nightmare to deploy to other machines. Open source 
solutions are strongly preferred. Zero monetary cost is a must! Also, 
the Helmert approximation seems to be not accurate enough.

Ideas anyone?

Tim