[mapserver-dev] [motion] Require GEOS > 3.1

[thomas bonfort]

devs,

While debugging a seemingly unrelated issue, we discovered a problem
with the GEOS error handling (namely the mapserver error handlers
being overriden by the OGR ones), c.f.
https://github.com/mapserver/mapserver/issues/4733#issuecomment-22694155
The clean fix to this is to use the GEOS thread-safe api, available
from  version 3.1 onwards (released in 2009), and thus to require at
least that version for mapserver. GDAL/OGR made the switch very
recently, so this does not seem like an extra-ordinary requirement:
http://lists.osgeo.org/pipermail/gdal-dev/2013-August/036877.html

motion: require at least GEOS version 3.1 for mapserver 6.4 and onward.

+1 thomas

best regards,
thomas