Fixes from Norman Vine for Cygwin support.
Fixes from Norman Vine for Cygwin support.


openscenegraph/osg,tomasthoresen/osg,marchelbling/osg,scrawl/osg,scrawl/osg,artoolkit/osg,marchelbling/osg,scrawl/osg,artoolkit/osg,tomasthoresen/osg,tomasthoresen/osg,jtorresfabra/osg,jtorresfabra/osg,artoolkit/osg,tomasthoresen/osg,marchelbling/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,openscenegraph/osg,jtorresfabra/osg,artoolkit/osg,marchelbling/osg,openscenegraph/osg