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- /* Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #ifndef _SYS_CDEFS_H
-
- #define _SYS_CDEFS_H 1
- #include <features.h>
-
- /* Some user header file might have defined this before. */
- #undef __P
-
- #ifdef __GNUC__
-
- #define __P(args) args /* GCC can always grok prototypes. */
- #define __DOTS , ...
-
- /* In GCC versions before 2.5, the `volatile' and `const' keywords have
- special meanings when applied to functions. In versions 2.5 and 2.6,
- the `__attribute__' syntax used below does not work properly. */
- #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
- #define __NORETURN __volatile
- #define __CONSTVALUE __const
- #elif 0 /* XXX */
- /* In GCC 2.5 and later, these keywords are meaningless when applied to
- functions, as ANSI requires. Instead, we use GCC's special
- `__attribute__' syntax. */
- #define __NORETURN __attribute__ ((__volatile__))
- #define __CONSTVALUE __attribute__ ((__const__))
- #else
- #define __NORETURN
- #define __CONSTVALUE
- #endif
-
- #else /* Not GCC. */
-
- #define __inline /* No inline functions. */
- #define __NORETURN /* No way to say functions never return. */
- #define __CONSTVALUE /* No way to say functions are functional. */
-
- #if (defined (__STDC__) && __STDC__) || defined (__cplusplus)
-
- #define __P(args) args
- #define __const const
- #define __signed signed
- #define __volatile volatile
- #define __DOTS , ...
-
- #else /* Not ANSI C or C++. */
-
- #define __P(args) () /* No prototypes. */
- #define __const /* No ANSI C keywords. */
- #define __signed
- #define __volatile
- #define __DOTS
-
- #endif /* ANSI C or C++. */
-
- #endif /* GCC. */
-
- /* For these things, GCC behaves the ANSI way normally,
- and the non-ANSI way under -traditional. */
-
- #if defined (__STDC__) && __STDC__
-
- #define __CONCAT(x,y) x ## y
- #define __STRING(x) #x
-
- /* This is not a typedef so `const __ptr_t' does the right thing. */
- #define __ptr_t void *
- typedef long double __long_double_t;
-
- #else
-
- #define __CONCAT(x,y) x/**/y
- #define __STRING(x) "x"
-
- #define __ptr_t char *
- typedef double __long_double_t;
-
- #endif
-
- /* The BSD header files use the ANSI keywords unmodified. (This means that
- old programs may lose if they use the new keywords as identifiers.) We
- define them to their __ versions, which are taken care of above. */
-
- #ifdef __USE_BSD
- #define const __const
- #define signed __signed
- #define volatile __volatile
- #endif
-
- /* C++ needs to know that types and declarations are C, not C++. */
- #ifdef __cplusplus
- #define __BEGIN_DECLS extern "C" {
- #define __END_DECLS }
- #else
- #define __BEGIN_DECLS
- #define __END_DECLS
- #endif
-
- #endif /* sys/cdefs.h */
-