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/* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */

/* Written 2000 by Werner Almesberger */

/*

 * 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.

 * 3. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *	This product includes software developed by the University of

 *	California, Berkeley and its contributors.

 * 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 1.54 2002/05/11 03:58:24 alfred Exp $

 */

#ifndef _SYS_CDEFS_H

#define _SYS_CDEFS_H

#define __FBSDID(x) /* nothing */

/*

 * Note: the goal here is not compatibility to K&R C. Since we know that we

 * have GCC which understands ANSI C perfectly well, we make use of this.

 */

#define __P(args)	args

#define __PMT(args)	args

#define __const		const

#define __signed	signed

#define __volatile	volatile

#define __DOTS    	, ...

#define __THROW

/*

 * 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 to use if it must work in non-ANSI

 * mode -- there must be no spaces between its arguments, and for nested

 * __CONCAT's, all the __CONCAT's must be at the left.  __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.

 */

#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 */

#ifdef __GNUC__

# define __ASMNAME(cname)  __XSTRING (__USER_LABEL_PREFIX__) cname

#endif

#define __ptr_t void *

#define __long_double_t  long double

#define __attribute_malloc__

#define __attribute_pure__

#define __attribute_format_strfmon__(a,b)

#define __flexarr      [0]

#ifdef  __cplusplus

# define __BEGIN_DECLS  extern "C" {

# define __END_DECLS    }

#else

# define __BEGIN_DECLS

# define __END_DECLS

#endif

#ifndef __BOUNDED_POINTERS__

# define __bounded      /* nothing */

# define __unbounded    /* nothing */

# define __ptrvalue     /* nothing */

#endif

#ifdef __GNUC__

#define	__strong_reference(sym,aliassym)	\

	extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));

#ifdef __ELF__

#ifdef __STDC__

#define	__weak_reference(sym,alias)	\

	__asm__(".weak " #alias);	\

	__asm__(".equ "  #alias ", " #sym)

#define	__warn_references(sym,msg)	\

	__asm__(".section .gnu.warning." #sym);	\

	__asm__(".asciz \"" msg "\"");	\

	__asm__(".previous")

#else

#define	__weak_reference(sym,alias)	\

	__asm__(".weak alias");		\

	__asm__(".equ alias, sym")

#define	__warn_references(sym,msg)	\

	__asm__(".section .gnu.warning.sym"); \

	__asm__(".asciz \"msg\"");	\

	__asm__(".previous")

#endif	/* __STDC__ */

#else	/* !__ELF__ */

#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	/* __STDC__ */

#endif	/* __ELF__ */

#endif	/* __GNUC__ */

#endif /* _SYS_CDEFS_H */