-#ifdef __GNUC__
-
-#define RETURN_ADDRESS_N(N) (__builtin_extract_return_addr (__builtin_return_address (N)))
-#define RETURN_ADDRESS() RETURN_ADDRESS_N(0)
-
-#elif defined(_MSC_VER)
-
-#include <intrin.h>
-#pragma intrinsic(_ReturnAddress)
-
-#define RETURN_ADDRESS() _ReturnAddress()
-#define RETURN_ADDRESS_N(N) NULL
-
-#else
-
-#error "Missing return address intrinsics implementation"
-
-#endif
-