#endif
#if (__i386 || __amd64) && __GNUC__
- #include <features.h>
-
- #if __GNUC_PREREQ(4,1)
- #define HAVE_ATOMIC
- #endif
+#define GNUC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
+#if GNUC_VERSION >= 40100
+#define HAVE_ATOMIC
+#endif
#endif