+/* GNUC_PREREQ (V, W, X) is true if this is GNU C version V.W.X or later.
+ It can be used in a preprocessor expression. */
+#ifndef __GNUC_MINOR__
+# define GNUC_PREREQ(v, w, x) false
+#elif ! defined __GNUC_PATCHLEVEL__
+# define GNUC_PREREQ(v, w, x) \
+ ((v) < __GNUC__ + ((w) < __GNUC_MINOR__ + ((x) == 0))
+#else
+# define GNUC_PREREQ(v, w, x) \
+ ((v) < __GNUC__ + ((w) < __GNUC_MINOR__ + ((x) <= __GNUC_PATCHLEVEL__)))
+#endif
+