Starting rviz, failed to initialize ogre, cannot find RenderSystem_GL.so

edit

Found an answer. See my answer below (guess I can't accept my own)

Setting up things on my (gentoo) desktop.

Command line output just about says everything:

$ rosrun rviz rviz
Failed to initialize Ogre: OGRE EXCEPTION(7:InternalErrorException): Could not load dynamic library RenderSystem_GL.  System Error: RenderSystem_GL.so: cannot open shared object file: No such file or directory in DynLib::load at /home/murph/ros/visualization_common/ogre/build/ogre_src_v1-7-1/OgreMain/src/OgreDynLib.cpp (line 91)
[ERROR] [1298662054.238455770]: Caught exception while loading: OGRE EXCEPTION(7:InternalErrorException): Could not load dynamic library RenderSystem_GL.  System Error: RenderSystem_GL.so: cannot open shared object file: No such file or directory in DynLib::load at /home/murph/ros/visualization_common/ogre/build/ogre_src_v1-7-1/OgreMain/src/OgreDynLib.cpp (line 91)                                                                                                                                                  
murph@murph ~/ros $ find . | grep -i RenderSystem_GL.so
./visualization_common/ogre/ogre/lib/OGRE/RenderSystem_GL.so
./visualization_common/ogre/build/ogre_src_v1-7-1/build/lib/RenderSystem_GL.so

My hardware: 01:00.0 VGA compatible controller: ATI Technologies Inc RV620 [FirePro 2260]

And my drivers: x11-drivers/xf86-video-ati version 6.13.1

[edit] I found this: https://code.ros.org/gf/project/ros/m...

Which sounds similar. I copied RenderSystem_GL.so, Plugin_OctreeSceneManager.so, and Plugin_ParticleFX.so up a folder as indicator (one by one as they were pointed out as missing), but now it cannot find Plugin_CgProgramManager.so which I do not have anywhere.

[edit 2] When doing 'make' after 'make wipe' on the ogre subtree, I see this:

-----------------------------------------------------------------------------
-- The following OPTIONAL packages could NOT be located on your system.
-- Consider installing them to enable more features from this software.
+ OpenGL ES: Support for the OpenGL ES 1.x render system <http: www.khronos.org="" opengles=""/>
+ cg: C for graphics shader language <http: developer.nvidia.com="" object="" cg_toolkit.html="">
+ POCO: POCO framework <http: pocoproject.org=""/>
+ tbb: Threading Building Blocks <http: www.threadingbuildingblocks.org=""/>
+ Doxygen: Tool for building API documentation <http: doxygen.org="">
+ CppUnit: Library for performing unit tests <http: cppunit.sourceforge.net="">
-----------------------------------------------------------------------------

Notice that cg is included there. So perhaps the configure scripts can't find my Cg libraries (they are installed)? I'm no cmake wizard, though.