From 1e2884748d98aaa168184fd69c4303a2d0aafad5 Mon Sep 17 00:00:00 2001
From: Remo E <remo.eichenberger@gmail.com>
Date: Sun, 19 Apr 2020 12:53:29 +0200
Subject: [PATCH] GEOS 3.8 compile fix

fix: https://github.com/gwaldron/osgearth/issues/1455
---
 src/osgEarth/GEOS.cpp | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/osgEarth/GEOS.cpp b/src/osgEarth/GEOS.cpp
index 07da3fdf4e..31f97ab45a 100644
--- a/src/osgEarth/GEOS.cpp
+++ b/src/osgEarth/GEOS.cpp
@@ -63,9 +63,13 @@ namespace
         {
             coords->push_back( coords->front() );
         }
+#if GEOS_VERSION_AT_LEAST(3,8)
+        geom::CoordinateSequence::Ptr seq = factory->create(coords);
+        return seq.get();
+#else
         geom::CoordinateSequence* seq = factory->create( coords );
-
         return seq;
+#endif
     }
 
     geom::Geometry*
@@ -141,12 +145,20 @@ namespace
                     if ( shell )
                     {
                         const Polygon* poly = static_cast<const Polygon*>(input);
+#if GEOS_VERSION_AT_LEAST(3,8)
+                        std::vector<geom::LinearRing*>* holes = poly->getHoles().size() > 0 ? new std::vector<geom::LinearRing*>() : 0L;
+#else
                         std::vector<geom::Geometry*>* holes = poly->getHoles().size() > 0 ? new std::vector<geom::Geometry*>() : 0L;
+#endif
                         if (holes)
                         {
                             for( RingCollection::const_iterator r = poly->getHoles().begin(); r != poly->getHoles().end(); ++r )
                             {
-                                geom::Geometry* hole = import( r->get(), f );
+#if GEOS_VERSION_AT_LEAST(3,8)
+                                geom::LinearRing* hole = dynamic_cast<geom::LinearRing*>(import( r->get(), f ));
+#else
+                                geom::Geometry* hole = import(r->get(), f);
+#endif
                                 if (hole)
                                 {
                                     if (hole->getGeometryTypeId() == geos::geom::GEOS_LINEARRING)