Annotation of prex/include/sys/cdefs.h, Revision 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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