add last compat header (seems unused, but in case of)

SofaKernel/modules/SofaHelper/CMakeLists.txt

@@ -275,6 +275,7 @@ set (COMPAT_HEADER_FILES
     ${COMPATSRC_ROOT}/sofa/helper/gl/glText.h
     ${COMPATSRC_ROOT}/sofa/helper/gl/glText.inl
     ${COMPATSRC_ROOT}/sofa/helper/gl/Color.h
+    ${COMPATSRC_ROOT}/sofa/helper/gl/Cylinder.h
     )
 
 # Create build and install versions of etc/sofa.ini:

SofaKernel/modules/SofaHelper/compat/sofa/helper/gl/Cylinder.h

@@ -0,0 +1,46 @@
+/******************************************************************************
+*                 SOFA, Simulation Open-Framework Architecture                *
+*                    (c) 2006 INRIA, USTL, UJF, CNRS, MGH                     *
+*                                                                             *
+* This program 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 program 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 program. If not, see <http://www.gnu.org/licenses/>.        *
+*******************************************************************************
+* Authors: The SOFA Team and external contributors (see Authors.txt)          *
+*                                                                             *
+* Contact information: contact@sofa-framework.org                             *
+******************************************************************************/
+#pragma once
+
+#include <sofa/helper/config.h>
+
+#if __has_include(<sofa/gl/Cylinder.h>)
+#include <sofa/gl/Cylinder.h>
+#define GL_CYLINDER_ENABLE_WRAPPER
+
+SOFA_DEPRECATED_HEADER(v21.06, "sofa/gl/Cylinder.h")
+
+#else
+#error "OpenGL headers have been moved to Sofa.GL; you will need to link against this library if you need OpenGL, and include <sofa/gl/Cylinder.h> instead of this one."
+#endif
+
+#ifdef GL_CYLINDER_ENABLE_WRAPPER
+
+namespace sofa::helper::gl
+{
+    using Cylinder = sofa::gl::Cylinder;
+
+} // namespace sofa::helper::gl
+
+#endif // GL_CYLINDER_ENABLE_WRAPPER
+
+#undef GL_CYLINDER_ENABLE_WRAPPER