Annotation of prex/include/sys/cdefs.h, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 1991, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Berkeley Software Design, Inc.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)cdefs.h 8.8 (Berkeley) 1/9/95
33: */
34:
35: #ifndef _SYS_CDEFS_H_
36: #define _SYS_CDEFS_H_
37:
38: /*
39: * Macro to test if we're using a GNU C compiler of a specific vintage
40: * or later, for e.g. features that appeared in a particular version
41: * of GNU C. Usage:
42: *
43: * #if __GNUC_PREREQ__(major, minor)
44: * ...cool feature...
45: * #else
46: * ...delete feature...
47: * #endif
48: */
49: #ifdef __GNUC__
50: #define __GNUC_PREREQ__(x, y) \
51: ((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) || \
52: (__GNUC__ > (x)))
53: #else
54: #define __GNUC_PREREQ__(x, y) 0
55: #endif
56:
57: #if defined(__cplusplus)
58: #define __BEGIN_DECLS extern "C" {
59: #define __END_DECLS };
60: #else
61: #define __BEGIN_DECLS
62: #define __END_DECLS
63: #endif
64:
65: #define __CONCAT(x,y) x ## y
66: #define __STRING(x) #x
67:
68: #if defined(__cplusplus) || defined(__PCC__)
69: #define __inline inline /* convert to C++/C99 keyword */
70: #else
71: #ifndef __GNUC__
72: #define __inline /* delete GCC keyword */
73: #endif
74: #endif /* !__cplusplus */
75:
76: #ifdef __GNUC__
77: #define __packed __attribute__((__packed__))
78: #define __noreturn __attribute__((__noreturn__))
79: #elif defined(__lint__)
80: #define __packed /* delete */
81: #define __noreturn /* delete */
82: #elif defined(__PCC__)
83: #define __packed _Pragma("packed")
84: #define __noreturn /* delete */
85: #else
86: #define __packed error: no __packed for this compiler
87: #define __noreturn /* delete */
88: #endif
89:
90: #endif /* !_SYS_CDEFS_H_ */
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