Fixes for headless mode.

simgear/misc/PathOptions.cxx

@@ -17,6 +17,12 @@
 //
 // $Id$
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#ifndef NO_OPENSCENEGRAPH_INTERFACE
+
 #include <osgDB/Registry>
 
 #include "PathOptions.hxx"
@@ -31,3 +37,5 @@ osgDB::ReaderWriter::Options* simgear::makeOptionsFromPath(const SGPath& path)
     options->setDatabasePath(path.str());
     return options;
 }
+
+#endif // of NO_OPENSCENEGRAPH_INTERFACE

simgear/misc/PathOptions.hxx

@@ -20,6 +20,7 @@
 #ifndef PATHOPTIONSHXX
 #define PATHOPTIONSHXX 1
 
+#ifndef NO_OPENSCENEGRAPH_INTERFACE
 #include <osgDB/ReaderWriter>
 #include <simgear/misc/sg_path.hxx>
 
@@ -28,3 +29,5 @@ namespace simgear
 osgDB::ReaderWriter::Options* makeOptionsFromPath(const SGPath&);
 }
 #endif
+
+#endif

simgear/misc/interpolator.cxx

@@ -16,6 +16,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include "interpolator.hxx"
 
 #include <simgear/math/SGMath.hxx>