Index: gl/glcanvas.h
===================================================================
RCS file: /cvsroot/xforms/xforms/gl/glcanvas.h,v
retrieving revision 1.3
diff -u -p -r1.3 glcanvas.h
--- gl/glcanvas.h	20 Nov 2003 11:06:49 -0000	1.3
+++ gl/glcanvas.h	17 May 2004 09:19:53 -0000
@@ -1,6 +1,14 @@
 #ifndef FL_GLCANVAS_H
 #define FL_GLCANVAS_H
 
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
+#include "forms.h"
+#include <GL/glx.h>
+
 /* OpenGL canvases */
 FL_EXPORT FL_OBJECT *fl_create_glcanvas(
 		int type,
@@ -71,5 +79,9 @@ FL_EXPORT Window fl_glwinopen(
 		int w,
 		int h
 		);
+
+#if defined(__cplusplus)
+}
+#endif
 
 #endif /* NOT FL_GLCANVAS_H */