Hi fglock,

your hint showed the right direction.

After installation of MesaLib-5.0.1 to /usr/local/lib i modified perldl.conf as follows

    ...
    OPENGL_LIBS => '-L/usr/local/lib -lGL -lGLU -lXext -lX11',
#  Mesa need -DGL_GLEXT_LEGACY for glPolygonOffsetEXT amoung others
    OPENGL_DEFINE => '-DGL_GLEXT_LEGACY',
     OPENGL_INC => '-I/usr/include/GL/',
    ...
[download]

Then i made PDL once more. Now the gluOrtho2D-error does no more appear and i get a window with GL-visualisation. Not quite the hoped-for, but this must have to do with the script itself. That means my main-problem is solved.

Thank you, :)