new RTS interface problem with ghc-5.04

I have just moved to ghc-5.04 to try the threaded runtime, however some code I have to do dynaminc module loading using the rts linker will not compile, failing with: RtsAPIDeprec.o undefined reference to Addr_Azh_con_info (in rts_mkAddr) this symbol appears to be defined in libHSlang.a, and I have a -syslib lang in the compile command... what's wrong here? secondly, if this interface is deprecated, (I presume this is something to do with the FFI?) where am I using rts_mkAddr and rts_getAddr, would that be in addrToHValue, and if so what is the non-deprecated way of doing this? Keean Schupke Department of Electrical & Electronic Engineering, Imperial College.