diff --git a/Include/pythread.h b/Include/pythread.h
index b5a6ec3..dfd6157 100644
--- a/Include/pythread.h
+++ b/Include/pythread.h
@@ -2,9 +2,6 @@
 #ifndef Py_PYTHREAD_H
 #define Py_PYTHREAD_H
 
-#define NO_EXIT_PROG		/* don't define PyThread_exit_prog() */
-				/* (the result is no use of signals on SGI) */
-
 typedef void *PyThread_type_lock;
 typedef void *PyThread_type_sema;
 
@@ -15,7 +12,6 @@
 PyAPI_FUNC(void) PyThread_init_thread(void);
 PyAPI_FUNC(long) PyThread_start_new_thread(void (*)(void *), void *);
 PyAPI_FUNC(void) PyThread_exit_thread(void);
-PyAPI_FUNC(void) PyThread__PyThread_exit_thread(void);
 PyAPI_FUNC(long) PyThread_get_thread_ident(void);
 
 PyAPI_FUNC(PyThread_type_lock) PyThread_allocate_lock(void);
@@ -28,11 +24,6 @@
 PyAPI_FUNC(size_t) PyThread_get_stacksize(void);
 PyAPI_FUNC(int) PyThread_set_stacksize(size_t);
 
-#ifndef NO_EXIT_PROG
-PyAPI_FUNC(void) PyThread_exit_prog(int);
-PyAPI_FUNC(void) PyThread__PyThread_exit_prog(int);
-#endif
-
 /* Thread Local Storage (TLS) API */
 PyAPI_FUNC(int) PyThread_create_key(void);
 PyAPI_FUNC(void) PyThread_delete_key(int);
diff --git a/Modules/_threadmodule.c b/Modules/_threadmodule.c
index 5a3f92a..aff755e 100644
--- a/Modules/_threadmodule.c
+++ b/Modules/_threadmodule.c
@@ -825,18 +825,6 @@
 A subthread can use this function to interrupt the main thread."
 );
 
-#ifndef NO_EXIT_PROG
-static PyObject *
-thread_PyThread_exit_prog(PyObject *self, PyObject *args)
-{
-	int sts;
-	if (!PyArg_ParseTuple(args, "i:exit_prog", &sts))
-		return NULL;
-	Py_Exit(sts); /* Calls PyThread_exit_prog(sts) or _PyThread_exit_prog(sts) */
-	for (;;) { } /* Should not be reached */
-}
-#endif
-
 static lockobject *newlockobject(void);
 
 static PyObject *
@@ -970,10 +958,6 @@
 	{"stack_size",		(PyCFunction)thread_stack_size,
 				METH_VARARGS,
 				stack_size_doc},
-#ifndef NO_EXIT_PROG
-	{"exit_prog",		(PyCFunction)thread_PyThread_exit_prog,
-	 METH_VARARGS},
-#endif
 	{NULL,			NULL}		/* sentinel */
 };
 
diff --git a/PC/os2emx/python27.def b/PC/os2emx/python27.def
index 7d05ec3..d87dd76 100644
--- a/PC/os2emx/python27.def
+++ b/PC/os2emx/python27.def
@@ -1168,7 +1168,6 @@
   "PyThread_delete_key"
   "PyThread_set_key_value"
   "PyThread_get_key_value"
-  "PyThread__exit_thread"
 
 ; From python26_s.lib(gcmodule)
 ;  "initgc"
diff --git a/PC/os2vacpp/python.def b/PC/os2vacpp/python.def
index 7d26546..a525c2a 100644
--- a/PC/os2vacpp/python.def
+++ b/PC/os2vacpp/python.def
@@ -376,7 +376,6 @@
                PyThreadState_GetDict
                PyThreadState_New
                PyThreadState_Swap
-               PyThread__exit_thread
                PyThread_acquire_lock
                PyThread_allocate_lock
                PyThread_allocate_sema
diff --git a/Python/thread_cthread.h b/Python/thread_cthread.h
index ca776c6..7163412 100644
--- a/Python/thread_cthread.h
+++ b/Python/thread_cthread.h
@@ -50,59 +50,15 @@
 	return (long) cthread_self();
 }
 
-static void
-do_PyThread_exit_thread(int no_cleanup)
-{
-	dprintf(("PyThread_exit_thread called\n"));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
-	cthread_exit(0);
-}
-
 void
 PyThread_exit_thread(void)
 {
-	do_PyThread_exit_thread(0);
-}
-
-void
-PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static
-void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
+	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-	if (no_cleanup)
-		_exit(status);
-	else
-		exit(status);
+		exit(0);
+	cthread_exit(0);
 }
 
-void
-PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void
-PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_foobar.h b/Python/thread_foobar.h
index 67491a1..1b993d1 100644
--- a/Python/thread_foobar.h
+++ b/Python/thread_foobar.h
@@ -29,54 +29,14 @@
 		PyThread_init_thread();
 }
 
-static
-void do_PyThread_exit_thread(int no_cleanup)
-{
-	dprintf(("PyThread_exit_thread called\n"));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
-}
-
 void
 PyThread_exit_thread(void)
 {
-	do_PyThread_exit_thread(0);
-}
-
-void
-PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static
-void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
+	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
+		exit(0);
 }
 
-void
-PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void
-PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_lwp.h b/Python/thread_lwp.h
index e93d65a..93d8295 100644
--- a/Python/thread_lwp.h
+++ b/Python/thread_lwp.h
@@ -47,50 +47,14 @@
 	return tid.thread_id;
 }
 
-static void do_PyThread_exit_thread(int no_cleanup)
+void PyThread_exit_thread(void)
 {
 	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
+		exit(0);
 	lwp_destroy(SELF);
 }
 
-void PyThread_exit_thread(void)
-{
-	do_PyThread_exit_thread(0);
-}
-
-void PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-	pod_exit(status);
-}
-
-void PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_nt.h b/Python/thread_nt.h
index 633fe40..0c5d192 100644
--- a/Python/thread_nt.h
+++ b/Python/thread_nt.h
@@ -203,16 +203,6 @@
 #endif
 }
 
-#ifndef NO_EXIT_PROG
-void
-PyThread_exit_prog(int status)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		exit(status);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support. It has too be implemented as semaphores.
  * I [Dag] tried to implement it with mutex but I could find a way to
diff --git a/Python/thread_os2.h b/Python/thread_os2.h
index 12eeed5..eee8de6 100644
--- a/Python/thread_os2.h
+++ b/Python/thread_os2.h
@@ -68,56 +68,16 @@
 #endif
 }
 
-static void
-do_PyThread_exit_thread(int no_cleanup)
+void
+PyThread_exit_thread(void)
 {
 	dprintf(("%ld: PyThread_exit_thread called\n",
 		 PyThread_get_thread_ident()));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
+		exit(0);
 	_endthread();
 }
 
-void 
-PyThread_exit_thread(void)
-{
-	do_PyThread_exit_thread(0);
-}
-
-void 
-PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void 
-do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-}
-
-void 
-PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void 
-PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.  This is implemented with an event semaphore and critical
  * sections to make it behave more like a posix mutex than its OS/2 
diff --git a/Python/thread_pth.h b/Python/thread_pth.h
index 8c7dbe9..f11e484 100644
--- a/Python/thread_pth.h
+++ b/Python/thread_pth.h
@@ -74,49 +74,14 @@
 	return (long) *(long *) &threadid;
 }
 
-static void do_PyThread_exit_thread(int no_cleanup)
+void PyThread_exit_thread(void)
 {
 	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized) {
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
+		exit(0);
 	}
 }
 
-void PyThread_exit_thread(void)
-{
-	do_PyThread_exit_thread(0);
-}
-
-void PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-}
-
-void PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_pthread.h b/Python/thread_pthread.h
index 60d2fb2..4305a19 100644
--- a/Python/thread_pthread.h
+++ b/Python/thread_pthread.h
@@ -225,55 +225,15 @@
 #endif
 }
 
-static void 
-do_PyThread_exit_thread(int no_cleanup)
-{
-	dprintf(("PyThread_exit_thread called\n"));
-	if (!initialized) {
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
-	}
-}
-
 void 
 PyThread_exit_thread(void)
 {
-	do_PyThread_exit_thread(0);
+	dprintf(("PyThread_exit_thread called\n"));
+	if (!initialized) {
+		exit(0);
+	}
 }
 
-void 
-PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void 
-do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-}
-
-void 
-PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void 
-PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 #ifdef USE_SEMAPHORES
 
 /*
diff --git a/Python/thread_sgi.h b/Python/thread_sgi.h
index 2346658..4f4b210 100644
--- a/Python/thread_sgi.h
+++ b/Python/thread_sgi.h
@@ -17,9 +17,6 @@
 static int waiting_for_threads;	/* protected by count_lock */
 static int nthreads;		/* protected by count_lock */
 static int exit_status;
-#ifndef NO_EXIT_PROG
-static int do_exit;		/* indicates that the program is to exit */
-#endif
 static int exiting;		/* we're already exiting (for maybe_exit) */
 static pid_t my_pid;		/* PID of main thread */
 static struct pidlist {
@@ -27,53 +24,11 @@
 	pid_t child;
 } pidlist[MAXPROC];	/* PIDs of other threads; protected by count_lock */
 static int maxpidindex;		/* # of PIDs in pidlist */
-
-#ifndef NO_EXIT_PROG
-/*
- * This routine is called as a signal handler when another thread
- * exits.  When that happens, we must see whether we have to exit as
- * well (because of an PyThread_exit_prog()) or whether we should continue on.
- */
-static void exit_sig(void)
-{
-	d2printf(("exit_sig called\n"));
-	if (exiting && getpid() == my_pid) {
-		d2printf(("already exiting\n"));
-		return;
-	}
-	if (do_exit) {
-		d2printf(("exiting in exit_sig\n"));
-#ifdef Py_DEBUG
-		if ((thread_debug & 8) == 0)
-			thread_debug &= ~1; /* don't produce debug messages */
-#endif
-		PyThread_exit_thread();
-	}
-}
-
-/*
- * This routine is called when a process calls exit().  If that wasn't
- * done from the library, we do as if an PyThread_exit_prog() was intended.
- */
-static void maybe_exit(void)
-{
-	dprintf(("maybe_exit called\n"));
-	if (exiting) {
-		dprintf(("already exiting\n"));
-		return;
-	}
-	PyThread_exit_prog(0);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Initialization.
  */
 static void PyThread__init_thread(void)
 {
-#ifndef NO_EXIT_PROG
-	struct sigaction s;
-#endif /* NO_EXIT_PROG */
 #ifdef USE_DL
 	long addr, size;
 #endif /* USE_DL */
@@ -93,16 +48,6 @@
 	if (usconfig(CONF_INITUSERS, 16) < 0)
 		perror("usconfig - CONF_INITUSERS");
 	my_pid = getpid();	/* so that we know which is the main thread */
-#ifndef NO_EXIT_PROG
-	atexit(maybe_exit);
-	s.sa_handler = exit_sig;
-	sigemptyset(&s.sa_mask);
-	/*sigaddset(&s.sa_mask, SIGUSR1);*/
-	s.sa_flags = 0;
-	sigaction(SIGUSR1, &s, 0);
-	if (prctl(PR_SETEXITSIG, SIGUSR1) < 0)
-		perror("prctl - PR_SETEXITSIG");
-#endif /* NO_EXIT_PROG */
 	if (usconfig(CONF_ARENATYPE, US_SHAREDONLY) < 0)
 		perror("usconfig - CONF_ARENATYPE");
 	usconfig(CONF_LOCKTYPE, US_DEBUG); /* XXX */
@@ -227,46 +172,24 @@
 	return getpid();
 }
 
-static void do_PyThread_exit_thread(int no_cleanup)
+void PyThread_exit_thread(void)
 {
 	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
+		exit(0);
 	if (ussetlock(count_lock) < 0)
 		perror("ussetlock (count_lock)");
 	nthreads--;
 	if (getpid() == my_pid) {
 		/* main thread; wait for other threads to exit */
 		exiting = 1;
-#ifndef NO_EXIT_PROG
-		if (do_exit) {
-			int i;
-
-			/* notify other threads */
-			clean_threads();
-			if (nthreads >= 0) {
-				dprintf(("kill other threads\n"));
-				for (i = 0; i < maxpidindex; i++)
-					if (pidlist[i].child > 0)
-						(void) kill(pidlist[i].child,
-							    SIGKILL);
-				_exit(exit_status);
-			}
-		}
-#endif /* NO_EXIT_PROG */
 		waiting_for_threads = 1;
 		if (ussetlock(wait_lock) < 0)
 			perror("ussetlock (wait_lock)");
 		for (;;) {
 			if (nthreads < 0) {
 				dprintf(("really exit (%d)\n", exit_status));
-				if (no_cleanup)
-					_exit(exit_status);
-				else
-					exit(exit_status);
+				exit(exit_status);
 			}
 			if (usunsetlock(count_lock) < 0)
 				perror("usunsetlock (count_lock)");
@@ -283,50 +206,11 @@
 		if (usunsetlock(wait_lock) < 0)
 			perror("usunsetlock (wait_lock)");
 	}
-#ifndef NO_EXIT_PROG
-	else if (do_exit)
-		(void) kill(my_pid, SIGUSR1);
-#endif /* NO_EXIT_PROG */
 	if (usunsetlock(count_lock) < 0)
 		perror("usunsetlock (count_lock)");
 	_exit(0);
 }
 
-void PyThread_exit_thread(void)
-{
-	do_PyThread_exit_thread(0);
-}
-
-void PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-	do_exit = 1;
-	exit_status = status;
-	do_PyThread_exit_thread(no_cleanup);
-}
-
-void PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_solaris.h b/Python/thread_solaris.h
index ff3e6f3..59ca002 100644
--- a/Python/thread_solaris.h
+++ b/Python/thread_solaris.h
@@ -64,59 +64,15 @@
 	return thr_self();
 }
 
-static void 
-do_PyThread_exit_thread(int no_cleanup)
-{
-	dprintf(("PyThread_exit_thread called\n"));
-	if (!initialized)
-		if (no_cleanup)
-			_exit(0);
-		else
-			exit(0);
-	thr_exit(0);
-}
-
 void 
 PyThread_exit_thread(void)
 {
-	do_PyThread_exit_thread(0);
-}
-
-void 
-PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void 
-do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
+	dprintf(("PyThread_exit_thread called\n"));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
-	if (no_cleanup)
-		_exit(status);
-	else
-		exit(status);
+		exit(0);
+	thr_exit(0);
 }
 
-void 
-PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void 
-PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support.
  */
diff --git a/Python/thread_wince.h b/Python/thread_wince.h
index e16f5d1..f8cf2cf 100644
--- a/Python/thread_wince.h
+++ b/Python/thread_wince.h
@@ -53,49 +53,14 @@
 	return GetCurrentThreadId();
 }
 
-static void do_PyThread_exit_thread(int no_cleanup)
-{
-	dprintf(("%ld: do_PyThread_exit_thread called\n", PyThread_get_thread_ident()));
-	if (!initialized)
-		if (no_cleanup)
-			exit(0); /* XXX - was _exit()!! */
-		else
-			exit(0);
-	_endthread();
-}
-
 void PyThread_exit_thread(void)
 {
-	do_PyThread_exit_thread(0);
-}
-
-void PyThread__exit_thread(void)
-{
-	do_PyThread_exit_thread(1);
-}
-
-#ifndef NO_EXIT_PROG
-static void do_PyThread_exit_prog(int status, int no_cleanup)
-{
-	dprintf(("PyThread_exit_prog(%d) called\n", status));
+	dprintf(("%ld: PyThread_exit_thread called\n", PyThread_get_thread_ident()));
 	if (!initialized)
-		if (no_cleanup)
-			_exit(status);
-		else
-			exit(status);
+		exit(0);
+	_endthread();
 }
 
-void PyThread_exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 0);
-}
-
-void PyThread__exit_prog(int status)
-{
-	do_PyThread_exit_prog(status, 1);
-}
-#endif /* NO_EXIT_PROG */
-
 /*
  * Lock support. It has to be implemented using Mutexes, as
  * CE doesnt support semaphores.  Therefore we use some hacks to