dnl $Id$
dnl
dnl Copyright (c) 2002 The Quakeforge Project.

dnl Checks if function/macro va_copy() is available
dnl Defines HAVE_VA_COPY on success.
AC_DEFUN(AC_FUNC_VA_COPY,
	[AC_CACHE_CHECK([for va_copy], ac_cv_func_va_copy,
		[AC_TRY_LINK([
#ifdef HAVE_STDARG_H
# include <stdarg.h>
#else
# include <varargs.h>
#endif],
			[
			va_list a, b;
			va_copy(a, b);],
			[ac_cv_func_va_copy=yes],
			[ac_cv_func_va_copy=no])])
if test $ac_cv_func_va_copy = yes; then
	AC_DEFINE(HAVE_VA_COPY, 1, [Define if va_copy is available])
fi])

dnl Checks if function/macro __va_copy() is available
dnl Defines HAVE__VA_COPY on success.
AC_DEFUN(AC_FUNC__VA_COPY,
	[AC_CACHE_CHECK([for __va_copy], ac_cv_func__va_copy,
		[AC_TRY_LINK([
#ifdef HAVE_STDARG_H
# include <stdarg.h>
#else
# include <varargs.h>
#endif],
		[
		va_list a,b;
		__va_copy(a, b);],
		[ac_cv_func__va_copy=yes],
		[ac_cv_func__va_copy=no])])
if test $ac_cv_func__va_copy = yes; then
	AC_DEFINE(HAVE__VA_COPY, 1, [Define if __va_copy is available])
fi])

dnl Checks if va_list is an array
dnl Devines VA_LIST_IS_ARRAY on success
AC_DEFUN(AC_TYPE_VA_LIST,
	[AC_CACHE_CHECK([if va_list is an array], ac_cv_type_va_list_array,
		[AC_TRY_LINK([
#ifdef HAVE_STDARG_H
# include <stdarg.h>
#else
# include <varargs.h>
#endif],
		[
		va_list a, b;
		a = b;],
		[ac_cv_type_va_list_array=no],
		[ac_cv_type_va_list_array=yes])])
if test $ac_cv_type_va_list_array = yes; then
	AC_DEFINE(VA_LIST_IS_ARRAY, 1, [Define if va_list is an array])
fi])