Estou tentando compilar o seguinte código fonte

#include <boost/property_tree/ptree.hpp>

int main() {
    boost::property_tree::ptree b;
    b.push_back(std::make_pair("a", "b"));

    return 9;
}

usando o seguinte compilador e instruções:

$ g++ ./source.cpp --std=c++11
$ g++ --version
g++ (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ # boost version is 1.55

e estou recebendo o seguinte erro

./source.cpp: In function ‘int main()’:
./source.cpp:5:41: error: no matching function for call to ‘boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> >::push_back(std::pair<const char*, const char*>)’
     b.push_back(std::make_pair("a", "b"));
                                     ^
In file included from /opt/boost/boost_1_55_0/boost/property_tree/ptree.hpp:516:0,
                 from ./source.cpp:1:
/opt/boost/boost_1_55_0/boost/property_tree/detail/ptree_implementation.hpp:362:9: note: candidate: boost::property_tree::basic_ptree<Key, Data, KeyCompare>::iterator boost::property_tree::basic_ptree<Key, Data, KeyCompare>::push_back(const value_type&) [with Key = std::basic_string<char>; Data = std::basic_string<char>; KeyCompare = std::less<std::basic_string<char> >; boost::property_tree::basic_ptree<Key, Data, KeyCompare>::value_type = std::pair<const std::basic_string<char>, boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >]
         basic_ptree<K, D, C>::push_back(const value_type &value)
         ^
/opt/boost/boost_1_55_0/boost/property_tree/detail/ptree_implementation.hpp:362:9: note:   no known conversion for argument 1 from ‘std::pair<const char*, const char*>’ to ‘const value_type& {aka const std::pair<const std::basic_string<char>, boost::property_tree::basic_ptree<std::basic_string<char>, std::basic_string<char> > >&}’

NOTA: se estou compilando isso sem --std = c ++ 11, o erro desaparece

PERGUNTA: como posso compilá-lo usando o padrão c ++ 11 ou superior? encontreihttps://svn.boost.org/trac10/ticket/6785 , mas no boost-1.55 já foi corrigido. Agradeço antecipadamente!