Added the parts of boost which we need to access shared_ptr and weak_ptr. This will allow for improved memory management of large volumes.

library/include/boost/config/platform/irix.hpp

@@ -0,0 +1,31 @@
+//  (C) Copyright John Maddock 2001 - 2003. 
+//  (C) Copyright Jens Maurer 2003. 
+//  Use, modification and distribution are subject to the 
+//  Boost Software License, Version 1.0. (See accompanying file 
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+
+//  See http://www.boost.org for most recent version.
+
+//  SGI Irix specific config options:
+
+#define BOOST_PLATFORM "SGI Irix"
+
+#define BOOST_NO_SWPRINTF 
+//
+// these are not auto detected by POSIX feature tests:
+//
+#define BOOST_HAS_GETTIMEOFDAY
+#define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
+
+#ifdef __GNUC__
+   // GNU C on IRIX does not support threads (checked up to gcc 3.3)
+#  define BOOST_DISABLE_THREADS
+#endif
+
+// boilerplate code:
+#define BOOST_HAS_UNISTD_H
+#include <boost/config/posix_features.hpp>
+
+
+