Linker Error When Building With xCode

I have followed the sample programs provided and the following lines cause my build to break.

void \*platformContext = CoronaLuaGetContext( L ); id\<CoronaRuntime\> runtime = (id\<CoronaRuntime\>)platformContext; ... // Use 'provider' in closure for kFunctions Self \*provider = new Self( runtime ); CoronaLuaPushUserdata( L, provider, kName ); luaL\_openlib( L, NULL, kFunctions, 1 );

The error I get is, "Undefined symbols for architecture i386:

  “Corona::IOSTextToSpeech::IOSTextToSpeech(id<CoronaRuntime>)”, referenced from:

      Corona::IOSTextToSpeech::Open(lua_State*) in libpl"