Cocoa check if function exists

Question

I'd like to use a function that's only available on OS X 10.9, but WITHOUT compiling with the 10.9 SDK. Is that possible?

I've tried weak linking, but the compiler just gives out an error that the function is not defined.

Answer 1

You say you don't want to compile against 10.9, but give no reason. Just in case you can:

If you set your target to 10.9 and your deployment to something lower then Xcode will weak link the 10.9 frameworks. You can then test for a C function being available by comparing its name to NULL. This fragment is taken from this document:

extern int MyWeakLinkedFunction() __attribute__((weak_import));

int main()
{
   int result = 0;

   if (MyWeakLinkedFunction != NULL)
   {
      result = MyWeakLinkedFunction();
   }

   return result;
}

(BTW: no sandbox issues this way.)