I am trying to use a dylib (libgeotiff) with a c program in Xcode. When I compile it with build configuration debug, it compiles fine and runs without error. But when I switch to Release, I get a linking error for every function in the dylib. My first thought was that the library was not compiled with universal support, which it wasn't. So using Porticus, I reinstalled it with universal. The utilities that come with it were compiled correctly with universal, I am not sure how to check the dylib.