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diff --git a/include/bits/xopen_lim.h b/include/bits/xopen_lim.h
new file mode 100644
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+++ b/include/bits/xopen_lim.h
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+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/*
+ * Never include this file directly; use <limits.h> instead.
+ */
+
+/* Additional definitions from X/Open Portability Guide, Issue 4, Version 2
+   System Interfaces and Headers, 4.16 <limits.h>
+
+   Please note only the values which are not greater than the minimum
+   stated in the standard document are listed.  The `sysconf' functions
+   should be used to obtain the actual value.  */
+
+#ifndef _XOPEN_LIM_H
+
+#define _XOPEN_LIM_H	1
+
+/* We do not provide fixed values for
+
+   ARG_MAX	Maximum length of argument to the `exec' function
+		including environment data.
+
+   ATEXIT_MAX	Maximum number of functions that may be registered
+		with `atexit'.
+
+   CHILD_MAX	Maximum number of simultaneous processes per real
+		user ID.
+
+   OPEN_MAX	Maximum number of files that one process can have open
+		at anyone time.
+
+   PAGESIZE
+   PAGE_SIZE	Size of bytes of a page.
+
+   PASS_MAX	Maximum number of significant bytes in a password.
+*/
+
+
+/* Maximum number of `iovec' structures that one process has available
+   for use with `readv' or writev'.  */
+#define IOV_MAX		_XOPEN_IOV_MAX
+
+/* The number of streams that one process can have open at one time.  */
+#define STREAM_MAX	_POSIX_STREAM_MAX
+
+/* Maximum number of bytes supported for the name of a time zone.  */
+#define TZNAME_MAX	_POSIX_TZNAME_MAX
+
+
+/* Maximum number of `iovec' structures that one process has available
+   for use with `readv' or writev'.  */
+#define	_XOPEN_IOV_MAX	_POSIX_UIO_MAXIOV
+
+
+/* Maximum value of `digit' in calls to the `printf' and `scanf'
+   functions.  We have no limit, so return a reasonable value.  */
+#define NL_ARGMAX	_POSIX_ARG_MAX
+
+/* Maximum number of bytes in a `LANG' name.  We have no limit.  */
+#define NL_LANGMAX	_POSIX2_LINE_MAX
+
+/* Maximum message number.  We have no limit.  */
+#define NL_MSGMAX	INT_MAX
+
+/* Maximum number of bytes in N-to-1 collation mapping.  We have no
+   limit.  */
+#define NL_NMAX		INT_MAX
+
+/* Maximum set number.  We have no limit.  */
+#define NL_SETMAX	INT_MAX
+
+/* Maximum number of bytes in a message.  We have no limit.  */
+#define NL_TEXTMAX	INT_MAX
+
+/* Default process priority.  */
+#define NZERO		20
+
+#endif /* bits/xopen_lim.h */