Linking against TK*

I am running -ldd on a executable and I am missing links to a bunch
of: libTK**.so files

such as:
libTKGeomBase.so.11 => not found (0)
libTKG3d.so.11 => not found (0)
libTKG2d.so.11 => not found (0)
libTKMath.so.11 => not found (0)

I've searched quite a bit and can't find where those files are located.
What's going on, how do I link against them?