111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/* Copyright (C) 1992, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _SYS_CDEFS_H
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#define _SYS_CDEFS_H 1
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#include <features.h>
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/* Some user header file might have defined this before. */
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#undef __P
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#ifdef __GNUC__
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# define __P(args) args /* GCC can always grok prototypes. */
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# define __DOTS , ...
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#else /* Not GCC. */
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# define __inline /* No inline functions. */
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# if (defined __STDC__ && __STDC__) || defined __cplusplus
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# define __P(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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# else /* Not ANSI C or C++. */
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# define __P(args) () /* No prototypes. */
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# define __const /* No ANSI C keywords. */
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# define __signed
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# define __volatile
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# define __DOTS
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# endif /* ANSI C or C++. */
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#endif /* GCC. */
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/* For these things, GCC behaves the ANSI way normally,
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and the non-ANSI way under -traditional. */
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#if defined __STDC__ && __STDC__
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# define __CONCAT(x,y) x ## y
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# define __STRING(x) #x
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/* This is not a typedef so `const __ptr_t' does the right thing. */
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# define __ptr_t void *
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# define __long_double_t long double
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#else
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# define __CONCAT(x,y) x/**/y
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# define __STRING(x) "x"
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# define __ptr_t char *
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# define __long_double_t long double
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/* The BSD header files use the ANSI keywords unmodified (this means that
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old programs may lose if they use the new keywords as identifiers), but
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those names are not available under -traditional. We define them to
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their __ versions, which are taken care of above. */
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#ifdef __USE_BSD
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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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#endif
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#endif /* __STDC__ */
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/* C++ needs to know that types and declarations are C, not C++. */
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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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/* GCC2 has various useful declarations that can be made with the
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`__attribute__' syntax. All of the ways we use this do fine if
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they are omitted for compilers that don't understand it. */
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#if !defined __GNUC__ || __GNUC__ < 2
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# define __attribute__(xyz) /* Ignore. */
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#endif
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/* For now no version of gcc knows the `restrict' keyword. Define it
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for now unconditionally to the empty string. */
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#define __restrict
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#endif /* sys/cdefs.h */
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