/* GCC.  Clang also defines __GNUC__ so don't detect GCC if using Clang. */
#if defined(__GNUC__) && !defined(__clang__) && !defined(DUK_F_CLANG)
#define DUK_F_GCC
#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
/* Convenience, e.g. gcc 4.5.1 == 40501; http://stackoverflow.com/questions/6031819/emulating-gccs-builtin-unreachable */
#define DUK_F_GCC_VERSION  (__GNUC__ * 10000L + __GNUC_MINOR__ * 100L + __GNUC_PATCHLEVEL__)
#else
#error cannot figure out gcc version
#endif
#endif