+/*
+ * So far (2013 - more than ten years), only ncurses implements
+ * use_extended_names().
+ */
+#if defined(NCURSES_XNAMES)
+#elif defined(NCURSES_VERSION) && defined(HAVE_TERM_ENTRY_H) && HAVE_TERM_ENTRY_H
+#define NCURSES_XNAMES 1
+#else
+#define NCURSES_XNAMES 0
+#endif
+