building freeradius statically

Hi, I am trying to build static version of freeradius by passing --enable-static --enable-shared=no to configure. However, I get an error related to static link of dynamic object libltdl.so. In the make output I can see it is explicitly referring to this shared library. How can I tell it to link with libltdl.a (which is already existing) instead? Thanks, Anurag