145 lines
5.2 KiB
C
145 lines
5.2 KiB
C
/* libc/sys/linux/sys/cdefs.h - Helper macros for K&R vs. ANSI C compat. */
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/* Written 2000 by Werner Almesberger */
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/*
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Berkeley Software Design, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
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* $FreeBSD: src/sys/sys/cdefs.h,v 1.54 2002/05/11 03:58:24 alfred Exp $
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*/
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#ifndef _SYS_CDEFS_H
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#define _SYS_CDEFS_H
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#define __FBSDID(x) /* nothing */
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/*
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* Note: the goal here is not compatibility to K&R C. Since we know that we
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* have GCC which understands ANSI C perfectly well, we make use of this.
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*/
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#define __P(args) args
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#define __PMT(args) args
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#define __const const
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#define __signed signed
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#define __volatile volatile
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#define __DOTS , ...
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#define __THROW
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/*
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* The __CONCAT macro is used to concatenate parts of symbol names, e.g.
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* with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
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* The __CONCAT macro is a bit tricky to use if it must work in non-ANSI
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* mode -- there must be no spaces between its arguments, and for nested
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* __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also
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* concatenate double-quoted strings produced by the __STRING macro, but
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* this only works with ANSI C.
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*
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* __XSTRING is like __STRING, but it expands any macros in its argument
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* first. It is only available with ANSI C.
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*/
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#define __CONCAT1(x,y) x ## y
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#define __CONCAT(x,y) __CONCAT1(x,y)
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#define __STRING(x) #x /* stringify without expanding x */
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#define __XSTRING(x) __STRING(x) /* expand x, then stringify */
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#ifdef __GNUC__
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# define __ASMNAME(cname) __XSTRING (__USER_LABEL_PREFIX__) cname
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#endif
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#define __ptr_t void *
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#define __long_double_t long double
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#define __attribute_malloc__
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#define __attribute_pure__
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#define __attribute_format_strfmon__(a,b)
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#define __flexarr [0]
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS
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# define __END_DECLS
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#endif
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#ifndef __BOUNDED_POINTERS__
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# define __bounded /* nothing */
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# define __unbounded /* nothing */
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# define __ptrvalue /* nothing */
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#endif
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#ifdef __GNUC__
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#define __strong_reference(sym,aliassym) \
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extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
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#ifdef __ELF__
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".weak " #alias); \
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__asm__(".equ " #alias ", " #sym)
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning." #sym); \
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__asm__(".asciz \"" msg "\""); \
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__asm__(".previous")
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".weak alias"); \
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__asm__(".equ alias, sym")
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#define __warn_references(sym,msg) \
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__asm__(".section .gnu.warning.sym"); \
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__asm__(".asciz \"msg\""); \
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__asm__(".previous")
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#endif /* __STDC__ */
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#else /* !__ELF__ */
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#ifdef __STDC__
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_" #alias "\",11,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#define __warn_references(sym,msg) \
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__asm__(".stabs \"" msg "\",30,0,0,0"); \
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__asm__(".stabs \"_" #sym "\",1,0,0,0")
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#else
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#define __weak_reference(sym,alias) \
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__asm__(".stabs \"_/**/alias\",11,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#define __warn_references(sym,msg) \
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__asm__(".stabs msg,30,0,0,0"); \
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__asm__(".stabs \"_/**/sym\",1,0,0,0")
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#endif /* __STDC__ */
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#endif /* __ELF__ */
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#endif /* __GNUC__ */
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#endif /* _SYS_CDEFS_H */
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