bsd_cdefs.h

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/*-
 * Copyright (c) 1991, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Berkeley Software Design, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *  @(#)cdefs.h 8.8 (Berkeley) 1/9/95
 * $FreeBSD: src/sys/sys/cdefs.h,v 1.114 2011/02/18 21:44:53 nwhitehorn Exp $
 */
 
/* Do not redefine macros if the system provides them in sys/cdefs.h.
 * The two macros correspond to different platforms. */
#ifndef _BSD_CDEFS_H_
#define _BSD_CDEFS_H_
 
/*
 * This code has been put in place to help reduce the addition of
 * compiler specific defines in FreeBSD code.  It helps to aid in
 * having a compiler-agnostic source tree.
 */
 
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
 
#if __GNUC__ >= 3 || defined(__INTEL_COMPILER)
#define __GNUCLIKE_ASM 3
#else
#define __GNUCLIKE_ASM 2
#endif
 
#define __CC_SUPPORTS___INLINE__ 1
 
#endif /* __GNUC__ || __INTEL_COMPILER */
 
#if defined(__STDC__) || defined(__cplusplus)
 
#define __volatile  volatile
#if defined(__cplusplus)
#define __inline    inline      /* convert to C++ keyword */
#else
#if !defined(__CC_SUPPORTS___INLINE)
#define __inline            /* delete GCC keyword */
#endif /* ! __CC_SUPPORTS___INLINE */
#endif /* !__cplusplus */
 
#else   /* !(__STDC__ || __cplusplus) */
 
#if !defined(__CC_SUPPORTS___INLINE)
#define __inline
#define __volatile
#endif  /* !__CC_SUPPORTS___INLINE */
#endif  /* !(__STDC__ || __cplusplus) */
 
/*
 * Macro to test if we're using a specific version of gcc or later.
 */
#ifndef __GNUC_PREREQ__
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
#define __GNUC_PREREQ__(ma, mi) \
    (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi))
#else
#define __GNUC_PREREQ__(ma, mi) 0
#endif
#endif /* __GNUC_PREREQ__ */
 
/*
 * Compiler-dependent macro to help declare pure (no side effects) functions.
 * It is null except for versions of gcc that are known to support the features
 * properly (old versions of gcc-2 supported the dead and pure features
 * in a different (wrong) way), and for icc.  If we do not provide an implementation
 * for a given compiler, let the compile fail if it is told to use
 * a feature that we cannot live without.
 */
#if !defined(__pure2) && (__GNUC_PREREQ__(2, 7) || defined(__INTEL_COMPILER))
#define __pure2     __attribute__((__const__))
#endif
 
#endif /* !_BSD_CDEFS_H_ */