Import Geant4 9.1.0 source tree

source/visualization/OpenGL/include/G4OpenGL.hh

@@ -23,11 +23,13 @@
 // * acceptance of all terms of the Geant4 Software license.          *
 // ********************************************************************
 //
-// $Id: G4OpenGL.hh,v 1.5 2007/02/08 14:01:55 allison Exp $
-// GEANT4 tag $Name: geant4-09-00 $
+// $Id: G4OpenGL.hh,v 1.6 2007/11/15 10:14:23 allison Exp $
+// GEANT4 tag $Name: geant4-09-01 $
 //
 // G.Barrand.
 
+#ifdef G4VIS_BUILD_OPENGL_DRIVER
+
 #ifndef G4OpenGL_h
 #define G4OpenGL_h 
 
@@ -41,3 +43,5 @@
 #define G4OPENGL_DBL_MAX 1.e308
 
 #endif
+
+#endif