usr/src/sys/sys/cdefs.h

/*
 * Copyright (c) 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)cdefs.h     7.2 (Berkeley) %G%
 */

/*
 * This file is designed to ease the porting from standard C to ANSI C.
 * It will eventually go away.
 * Questions to K. Bostic.
 */

#if __STDC__ || c_plusplus
#define CONCAT(x,y)     x ## y
#define PROTOTYPE(p)    p
#define STRING(x)       #x
#else
#define const
#define volatile
#define signed
#define CONCAT(x,y)     x/**/y
#define PROTOTYPE(p)    ()
#define STRING(x)       "x"
#endif