xref: /illumos-gate/usr/src/lib/libresolv2/include/sys/cdefs.h (revision 5422785d352a2bb398daceab3d1898a8aa64d006)
1 /*
2  * ++Copyright++ 1991, 1993
3  * -
4  * Copyright (c) 1991, 1993
5  *    The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  * 	This product includes software developed by the University of
18  * 	California, Berkeley and its contributors.
19  * 4. Neither the name of the University nor the names of its contributors
20  *    may be used to endorse or promote products derived from this software
21  *    without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  * -
35  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
36  *
37  * Permission to use, copy, modify, and distribute this software for any
38  * purpose with or without fee is hereby granted, provided that the above
39  * copyright notice and this permission notice appear in all copies, and that
40  * the name of Digital Equipment Corporation not be used in advertising or
41  * publicity pertaining to distribution of the document or software without
42  * specific, written prior permission.
43  *
44  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
47  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51  * SOFTWARE.
52  * -
53  * --Copyright--
54  */
55 
56 /*
57  *	@(#)cdefs.h	8.1 (Berkeley) 6/2/93
58  *	$Id: cdefs.h,v 1.2 2004/07/19 05:54:07 marka Exp $
59  */
60 
61 #ifndef	_CDEFS_H_
62 #define	_CDEFS_H_
63 
64 #if defined(__cplusplus)
65 #define	__BEGIN_DECLS	extern "C" {
66 #define	__END_DECLS	};
67 #else
68 #define	__BEGIN_DECLS
69 #define	__END_DECLS
70 #endif
71 
72 /*
73  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
74  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
75  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
76  * in between its arguments.  __CONCAT can also concatenate double-quoted
77  * strings produced by the __STRING macro, but this only works with ANSI C.
78  */
79 #if defined(__STDC__) || defined(__cplusplus)
80 #define	__P(protos)	protos		/* full-blown ANSI C */
81 #define	__CONCAT(x,y)	x ## y
82 #define	__STRING(x)	#x
83 
84 #define	__const		const		/* define reserved names to standard */
85 #define	__signed	signed
86 #define	__volatile	volatile
87 #if defined(__cplusplus)
88 #define	__inline	inline		/* convert to C++ keyword */
89 #else
90 #ifndef __GNUC__
91 #define	__inline			/* delete GCC keyword */
92 #endif /* !__GNUC__ */
93 #endif /* !__cplusplus */
94 
95 #else	/* !(__STDC__ || __cplusplus) */
96 #define	__P(protos)	()		/* traditional C preprocessor */
97 #define	__CONCAT(x,y)	x/**/y
98 #define	__STRING(x)	"x"
99 
100 #ifndef __GNUC__
101 #define	__const				/* delete pseudo-ANSI C keywords */
102 #define	__inline
103 #define	__signed
104 #define	__volatile
105 /*
106  * In non-ANSI C environments, new programs will want ANSI-only C keywords
107  * deleted from the program and old programs will want them left alone.
108  * When using a compiler other than gcc, programs using the ANSI C keywords
109  * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
110  * When using "gcc -traditional", we assume that this is the intent; if
111  * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
112  */
113 #ifndef	NO_ANSI_KEYWORDS
114 #define	const				/* delete ANSI C keywords */
115 #define	inline
116 #define	signed
117 #define	volatile
118 #endif
119 #endif	/* !__GNUC__ */
120 #endif	/* !(__STDC__ || __cplusplus) */
121 
122 /*
123  * GCC1 and some versions of GCC2 declare dead (non-returning) and
124  * pure (no side effects) functions using "volatile" and "const";
125  * unfortunately, these then cause warnings under "-ansi -pedantic".
126  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
127  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
128  * in the distribution version of 2.5.5).
129  */
130 #if !defined(__GNUC__) || __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5)
131 #define	__attribute__(x)	/* delete __attribute__ if non-gcc or gcc1 */
132 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
133 #define	__dead		__volatile
134 #define	__pure		__const
135 #endif
136 #endif
137 
138 /* Delete pseudo-keywords wherever they are not available or needed. */
139 #ifndef __dead
140 #define	__dead
141 #define	__pure
142 #endif
143 
144 #endif /* !_CDEFS_H_ */
145