Multithreaded DLL Equivalent?

I'm hooking llmozlib into the Mac build of Torque and I began getting garbage output as soon as llmozlib initialized. I am assuming the issue has to do with various compiler and linker settings. Primary I think would be the multithreaded dynamic nature of the program interaction. Getting the PC build up was a cinch. What options must I choose when building with Xcode? Right now it seems like the exe is dying when it tries to access some memory occupied by llmozlib or something to that effect. I'm trying to build as a dynamic library but I'm running into linker errors.