Forcing a linking error?

Dear ghc-devs, There is a commonly used library which has at least one function that when compiled into a program, requires the threaded run time system. Without the threaded runtime, the program just hangs. One kludgy solution to this problem is to have the function check for Control.Concurrent.rtsSupportsBoundThreads being true and throwing an error if its not. However, it would be much nicer if this could be turned into a link time error. Anyone have any ideas how this might be done? Cheers, Eri -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/