-/* Macros to set/clear/test flags. */
-#undef SET
-#define SET(t, f) ((t) |= (f))
-#undef CLR
-#define CLR(t, f) ((t) &= ~(f))
-#undef ISSET
-#define ISSET(t, f) ((t) & (f))
-
-/* ANSI-style OS defs for HP-UX and ConvexOS. */
-#if defined(hpux) && !defined(__hpux)
-# define __hpux 1
-#endif /* hpux */
-
-#if defined(convex) && !defined(__convex__)
-# define __convex__ 1
-#endif /* convex */
-