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diff --git a/src/third_party/boost-1.60.0/libs/timer/src/auto_timers_construction.cpp b/src/third_party/boost-1.60.0/libs/timer/src/auto_timers_construction.cpp
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+// boost auto_timers_construction.cpp ------------------------------------------------//
+
+// Copyright Beman Dawes 2007, 2011
+
+// Distributed under the Boost Software License, Version 1.0.
+// See http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/timer for documentation.
+
+//--------------------------------------------------------------------------------------//
+
+// These constructors are in a separate file so that this translation unit will
+// not be linked in except when one of the constructors is actually used. This
+// is important since header <iostream> is required, and it incurs the cost of
+// the standard stream objects even if they are not used.
+
+//--------------------------------------------------------------------------------------//
+
+// define BOOST_TIMER_SOURCE so that <boost/timer/config.hpp> knows
+// the library is being built (possibly exporting rather than importing code)
+#define BOOST_TIMER_SOURCE
+
+#include <boost/timer/timer.hpp>
+#include <iostream>
+
+namespace
+{
+ // CAUTION: must be identical to same constant in cpu_timer.cpp
+ const std::string default_fmt(" %ws wall, %us user + %ss system = %ts CPU (%p%)\n");
+}
+
+namespace boost
+{
+ namespace timer
+ {
+ auto_cpu_timer::auto_cpu_timer(short places) // #1
+ : m_places(places), m_os(&std::cout), m_format(default_fmt) { start(); }
+
+ auto_cpu_timer::auto_cpu_timer(short places, const std::string& format) // #2
+ : m_places(places), m_os(&std::cout), m_format(format) { start(); }
+
+ auto_cpu_timer::auto_cpu_timer(const std::string& format) // #3
+ : m_places(default_places), m_os(&std::cout), m_format(format) { start(); }
+
+ } // namespace timer
+} // namespace boost