Provide IRT process interface

src/untrusted/nacl/stubs/signal.c

Index: src/untrusted/nacl/stubs/signal.c
diff --git a/src/untrusted/nacl/stubs/signal.c b/src/untrusted/nacl/stubs/signal.c
deleted file mode 100644
index ec109989062cceaaa51c65023a03d8180c782313..0000000000000000000000000000000000000000
--- a/src/untrusted/nacl/stubs/signal.c
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2011 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * Stub routine for `signal' for porting support.
- */
-
-#include <errno.h>
-#include <signal.h>
-
-_sig_func_ptr signal(int sig, _sig_func_ptr handler) {
-  errno = ENOSYS;
-  return SIG_ERR;
-}