FPC is very strict with most things and external definitions are no different, while Delphi/Kylix will allow you to get away with the definition existing, while the DLL/SO does not contain the implementation. In this case, the definition dWorldQuickStop exists in the .pas file but does not exist in the DLL. So you have 2 options....
1. Comment out the definition of dWorldQuickStop and everything should be sweet.

2. Create a new DLL, or if you get the error on Linux, a new SO that include the missing dWorldQuickStop

I hope this helps.

PS I have just sent an email to the DelphiODE dudes asking them if is should be there all not. In either case a definate solution should be fortchcoming in the next few days.