source: rtems/cpukit/libcsupport/include/sys/cdefs.h @ 9e7678d

/*
 * Copyright (c) 1991, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Berkeley Software Design, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)cdefs.h     8.8 (Berkeley) 1/9/95
 * $FreeBSD: src/sys/sys/cdefs.h,v 1.87 2005/03/07 15:40:25 stefanf Exp $
 */

/*
 * $Id$
 */
#ifndef _SYS_CDEFS_H_
#define _SYS_CDEFS_H_

#if defined(__cplusplus)
#define __BEGIN_DECLS   extern "C" {
#define __END_DECLS     }
#else
#define __BEGIN_DECLS
#define __END_DECLS
#endif

/*
 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
 * in between its arguments.  __CONCAT can also concatenate double-quoted
 * strings produced by the __STRING macro, but this only works with ANSI C.
 *
 * __XSTRING is like __STRING, but it expands any macros in its argument
 * first.  It is only available with ANSI C.
 */
#if defined(__STDC__) || defined(__cplusplus)
#define __P(protos)     protos          /* full-blown ANSI C */
#define __CONCAT1(x,y)  x ## y
#define __CONCAT(x,y)   __CONCAT1(x,y)
#define __STRING(x)     #x              /* stringify without expanding x */
#define __XSTRING(x)    __STRING(x)     /* expand x, then stringify */

#define __const         const           /* define reserved names to standard */
#define __signed        signed
#define __volatile      volatile
#if defined(__cplusplus)
#define __inline        inline          /* convert to C++ keyword */
#else
#ifndef __GNUC__
#define __inline                        /* delete GCC keyword */
#endif /* !__GNUC__ */
#endif /* !__cplusplus */

#else   /* !(__STDC__ || __cplusplus) */
#define __P(protos)     ()              /* traditional C preprocessor */
#define __CONCAT(x,y)   x/**/y
#define __STRING(x)     "x"

#ifndef __GNUC__
#define __const                         /* delete pseudo-ANSI C keywords */
#define __inline
#define __signed
#define __volatile
/*
 * In non-ANSI C environments, new programs will want ANSI-only C keywords
 * deleted from the program and old programs will want them left alone.
 * When using a compiler other than gcc, programs using the ANSI C keywords
 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
 * When using "gcc -traditional", we assume that this is the intent; if
 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
 */
#ifndef NO_ANSI_KEYWORDS
#define const                           /* delete ANSI C keywords */
#define inline
#define signed
#define volatile
#endif  /* !NO_ANSI_KEYWORDS */
#endif  /* !__GNUC__ */
#endif  /* !(__STDC__ || __cplusplus) */

/*
 * GCC1 and some versions of GCC2 declare dead (non-returning) and
 * pure (no side effects) functions using "volatile" and "const";
 * unfortunately, these then cause warnings under "-ansi -pedantic".
 * GCC2.5 uses a new, peculiar __attribute__((attrs)) style.  All of
 * these work for GNU C++ (modulo a slight glitch in the C++ grammar
 * in the distribution version of 2.5.5).
 */
#if __GNUC__ < 2
#define __dead
#define __dead2
#define __pure
#define __pure2
#define __unused
#define __attribute__(x)
#endif
#if __GNUC__ == 2 && __GNUC_MINOR__ < 5
#define __dead          __volatile
#define __dead2
#define __pure          __const
#define __pure2
#define __unused
#endif
#if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
#define __dead
#define __dead2         __attribute__((__noreturn__))
#define __pure
#define __pure2         __attribute__((__const__))
#define __unused
#endif
#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3
#define __dead
#define __dead2         __attribute__((__noreturn__))
#define __pure
#define __pure2         __attribute__((__const__))
#define __unused        __attribute__((__unused__))
#endif

#ifdef __GNUC__
#ifdef __STDC__
#define __weak_reference(sym,alias)     \
        __asm__(".stabs \"_" #alias "\",11,0,0,0");     \
        __asm__(".stabs \"_" #sym "\",1,0,0,0")
#define __warn_references(sym,msg)      \
        __asm__(".stabs \"" msg "\",30,0,0,0");         \
        __asm__(".stabs \"_" #sym "\",1,0,0,0")
#else
#define __weak_reference(sym,alias)     \
        __asm__(".stabs \"_/**/alias\",11,0,0,0");      \
        __asm__(".stabs \"_/**/sym\",1,0,0,0")
#define __warn_references(sym,msg)      \
        __asm__(".stabs msg,30,0,0,0");                 \
        __asm__(".stabs \"_/**/sym\",1,0,0,0")
#endif
#endif

#define __IDSTRING(name,string) \
        static const char name[] __attribute__((__unused__)) = string

#ifndef __RCSID
#define __RCSID(s)      __IDSTRING(rcsid,s)
#endif

#ifndef __RCSID_SOURCE
#define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s)
#endif

#ifndef __COPYRIGHT
#define __COPYRIGHT(s)  __IDSTRING(copyright,s)
#endif

#endif /* !_SYS_CDEFS_H_ */