Adds external dep dtentity

external/dtEntity/include/dtEntityOSG/export.h

@@ -0,0 +1,31 @@
+#pragma once
+
+/*
+* dtEntity Game and Simulation Engine
+*
+* This library is free software; you can redistribute it and/or modify it under
+* the terms of the GNU Lesser General Public License as published by the Free
+* Software Foundation; either version 2.1 of the License, or (at your option)
+* any later version.
+*
+* This library is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+* details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with this library; if not, write to the Free Software Foundation, Inc.,
+* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*
+* Martin Scheffler
+*/
+
+#if defined(_MSC_VER) || defined(__CYGWIN__) || defined(__MINGW32__) || defined( __BCPLUSPLUS__)  || defined( __MWERKS__)
+#   ifdef DTENTITY_OSG_LIBRARY
+#      define DTENTITY_OSG_EXPORT __declspec(dllexport)
+#   else
+#      define DTENTITY_OSG_EXPORT __declspec(dllimport)
+#   endif 
+#else
+#   define DTENTITY_OSG_EXPORT
+#endif