v.in.dgn requires dgn library and header files
written by Frank Warmerdam.

See http://www.remotesensing.org/gdal/index.html.


The dgn-header files have to be linked from:
gdal/ogr/ogrsf_frmts/dgn/

e.g.

   ln -s /opt/soft/gdal/ogr/ogrsf_frmts/dgn/dgnlibp.h dgnlibp.h
   ln -s /opt/soft/gdal/ogr/ogrsf_frmts/dgn/dgnlib.h dgnlib.h
