freebsd-dev/sys/i386/include/varargs.h
Joerg Wunsch a5f50ef9e4 netchild's mega-patch to isolate compiler dependencies into a central
place.

This moves the dependency on GCC's and other compiler's features into
the central sys/cdefs.h file, while the individual source files can
then refer to #ifdef __COMPILER_FEATURE_FOO where they by now used to
refer to #if __GNUC__ > 3.1415 && __BARC__ <= 42.

By now, GCC and ICC (the Intel compiler) have been actively tested on
IA32 platforms by netchild.  Extension to other compilers is supposed
to be possible, of course.

Submitted by:	netchild
Reviewed by:	various developers on arch@, some time ago
2005-03-02 21:33:29 +00:00

90 lines
3.1 KiB
C

/*-
* Copyright (c) 2002 David E. O'Brien. All rights reserved.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, 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.
*
* @(#)varargs.h 8.2 (Berkeley) 3/22/94
* $FreeBSD$
*/
#ifndef _MACHINE_VARARGS_H_
#define _MACHINE_VARARGS_H_
#ifndef _SYS_CDEFS_H_
#error this file needs sys/cdefs.h as a prerequisite
#endif
#ifdef __GNUCLIKE_BUILTIN_VARARGS
#include <sys/_types.h>
#ifndef _VA_LIST_DECLARED
#define _VA_LIST_DECLARED
typedef __va_list va_list;
#endif
typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
#define va_alist __builtin_va_alist
#define va_dcl __builtin_va_alist_t __builtin_va_alist; ...
#define va_start(ap) __builtin_varargs_start(ap)
#define va_arg(ap, type) __builtin_va_arg((ap), type)
#define va_end(ap) __builtin_va_end(ap)
#else /* !__GNUCLIKE_BUILTIN_VARARGS */
typedef char *va_list;
#define __va_size(type) \
(((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int))
#if defined(__GNUCLIKE_BUILTIN_VAALIST)
#define va_alist __builtin_va_alist
#endif
#ifdef __CC_SUPPORTS_VARADIC_XXX
#define va_dcl int va_alist; ...
#else
#define va_dcl int va_alist;
#endif
#define va_start(ap) \
((ap) = (va_list)&va_alist)
#define va_arg(ap, type) \
(*(type *)((ap) += __va_size(type), (ap) - __va_size(type)))
#define va_end(ap)
#endif /* __GNUCLIKE_BUILTIN_VARARGS */
#endif /* !_MACHINE_VARARGS_H_ */