update boost on linux
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@@ -1,4 +1,4 @@
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/* Copyright 2006-2008 Joaquin M Lopez Munoz.
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/* Copyright 2006-2018 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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@@ -30,13 +30,18 @@
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#include <boost/detail/workaround.hpp>
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#if BOOST_WORKAROUND(__GNUC__, <4)||\
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BOOST_WORKAROUND(__GNUC__,==4)&&(__GNUC_MINOR__<2)
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BOOST_WORKAROUND(__GNUC__,==4)&&(__GNUC_MINOR__<2)||\
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BOOST_WORKAROUND(__GNUC__, ==7)&&( __cplusplus>=201703L)||\
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BOOST_WORKAROUND(__GNUC__, >=8)&&( __cplusplus>=201103L)
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/* The default trick on which the macro is based, namely adding a int=0
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* defaulted template parameter, does not work in GCC prior to 4.2 due to
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* an unfortunate compiler non-standard extension, as explained in
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* http://lists.boost.org/boost-users/2007/07/29866.php
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* We resort to an uglier technique, adding defaulted template parameters
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* so as to exceed BOOST_MPL_LIMIT_METAFUNCTION_ARITY.
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* As it happens, GCC 7 in C++17 mode and GCC 8 (and presumably later) in
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* C++11 mode (and presumably later) go back to this old behavior, anticipating
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* the resolution of CWG DR 150 (see P0522R0).
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* In these cases we resort to an uglier technique, adding defaulted template
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* parameters so as to exceed BOOST_MPL_LIMIT_METAFUNCTION_ARITY.
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*/
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#include <boost/mpl/limits/arity.hpp>
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