VTK is linking with libGLU
I thought GLU wasn't required for VTK, however, when I do
objdump -p libvtkRenderingOpenGL*
I get
NEEDED libGL.so.1 NEEDED libGLU.so.1
It looks like CMake's FindOpenGL is finding both libGL and libGLU, and VTK is linking against both.
Edited by Clinton Stimpson