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diff --git a/posix/sys/wait.h b/posix/sys/wait.h
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+/* Copyright (C) 1991, 1992, 1993, 1994 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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/*
+ *	POSIX Standard: 3.2.1 Wait for Process Termination	<sys/wait.h>
+ */
+
+#ifndef	_SYS_WAIT_H
+
+#define	_SYS_WAIT_H	1
+#include <features.h>
+
+__BEGIN_DECLS
+
+#include <gnu/types.h>
+
+/* This will define the `W*' macros for the flag
+   bits to `waitpid', `wait3', and `wait4'.  */
+#include <waitflags.h>
+
+#ifdef	__USE_BSD
+
+/* Lots of hair to allow traditional BSD use of `union wait'
+   as well as POSIX.1 use of `int' for the status word.  */
+
+#ifdef	__GNUC__
+#define	__WAIT_INT(status)						      \
+  (__extension__ ({ union { __typeof(status) __in; int __i; } __u;	      \
+		    __u.__in = (status); __u.__i; }))
+#else
+#define	__WAIT_INT(status)	(*(int *) &(status))
+#endif
+
+/* This is the type of the argument to `wait'.
+
+   NOTE: Since this functionality is volatile, I'm disabling the use of it for
+   now.
+
+With GCC 2.6.1 and later, the funky union causes redeclarations with either
+   `int *' or `union wait *' to be allowed without complaint.
+   __WAIT_STATUS_DEFN is the type used in the actual function
+   definitions. */
+
+#if	(!defined (__GNUC__) || __GNUC__ < 2 || \
+	 /*(__GNUC__ == 2 && __GNUC_MINOR__ < 6)*/ 1)
+#define	__WAIT_STATUS		__ptr_t
+#define	__WAIT_STATUS_DEFN	__ptr_t
+#else
+/* This works in GCC 2.6.1 and later.  */
+typedef union
+  {
+    union wait *__uptr;
+    int *__iptr;
+  } __WAIT_STATUS __attribute__ ((transparent_union));
+#define	__WAIT_STATUS_DEFN	int *
+#endif
+
+#else /* Don't use BSD.  */
+
+#define	__WAIT_INT(status)	(status)
+#define	__WAIT_STATUS		int *
+#define	__WAIT_STATUS_DEFN	int *
+
+#endif /* Use BSD.  */
+
+/* This will define all the `__W*' macros.  */
+#include <waitstatus.h>
+
+#define	WEXITSTATUS(status)	__WEXITSTATUS(__WAIT_INT(status))
+#define	WTERMSIG(status)	__WTERMSIG(__WAIT_INT(status))
+#define	WSTOPSIG(status)	__WSTOPSIG(__WAIT_INT(status))
+#define	WIFEXITED(status)	__WIFEXITED(__WAIT_INT(status))
+#define	WIFSIGNALED(status)	__WIFSIGNALED(__WAIT_INT(status))
+#define	WIFSTOPPED(status)	__WIFSTOPPED(__WAIT_INT(status))
+
+#ifdef	__USE_BSD
+#define	WCOREFLAG		__WCOREFLAG
+#define	WCOREDUMP(status)	__WCOREDUMP(__WAIT_INT(status))
+#define	W_EXITCODE(ret, sig)	__W_EXITCODE(ret, sig)
+#define	W_STOPCODE(sig)		__W_STOPCODE(sig)
+#endif
+
+
+/* Wait for a child to die.  When one does, put its status in *STAT_LOC
+   and return its process ID.  For errors, return (pid_t) -1.  */
+extern __pid_t __wait __P ((__WAIT_STATUS __stat_loc));
+extern __pid_t wait __P ((__WAIT_STATUS __stat_loc));
+
+#ifdef	__USE_BSD
+/* Special values for the PID argument to `waitpid' and `wait4'.  */
+#define	WAIT_ANY	(-1)	/* Any process.  */
+#define	WAIT_MYPGRP	0	/* Any process in my process group.  */
+#endif
+
+/* Wait for a child matching PID to die.
+   If PID is greater than 0, match any process whose process ID is PID.
+   If PID is (pid_t) -1, match any process.
+   If PID is (pid_t) 0, match any process with the
+   same process group as the current process.
+   If PID is less than -1, match any process whose
+   process group is the absolute value of PID.
+   If the WNOHANG bit is set in OPTIONS, and that child
+   is not already dead, return (pid_t) 0.  If successful,
+   return PID and store the dead child's status in STAT_LOC.
+   Return (pid_t) -1 for errors.  If the WUNTRACED bit is
+   set in OPTIONS, return status for stopped children; otherwise don't.  */
+extern __pid_t __waitpid __P ((__pid_t __pid, int *__stat_loc,
+			       int __options));
+extern __pid_t waitpid __P ((__pid_t __pid, int *__stat_loc,
+			     int __options));
+#ifdef	__USE_BSD
+/* This being here makes the prototypes valid whether or not
+   we have already included <sys/resource.h> to define `struct rusage'.  */
+struct rusage;
+
+/* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
+   return its process ID.  For errors return (pid_t) -1.  If USAGE is not
+   nil, store information about the child's resource usage there.  If the
+   WUNTRACED bit is set in OPTIONS, return status for stopped children;
+   otherwise don't.  */
+extern __pid_t __wait3 __P ((__WAIT_STATUS __stat_loc,
+			     int __options, struct rusage * __usage));
+extern __pid_t wait3 __P ((__WAIT_STATUS __stat_loc,
+			   int __options, struct rusage * __usage));
+
+/* PID is like waitpid.  Other args are like wait3.  */
+extern __pid_t __wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,
+			     int __options, struct rusage *__usage));
+extern __pid_t wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,
+			   int __options, struct rusage *__usage));
+#endif /* Use BSD.  */
+
+
+__END_DECLS
+
+#endif /* sys/wait.h  */