/usr/include/boost/bind.hpp:36:1: note: « #pragma message: The practice
of declaring the Bind placeholders (_1, _2, ...) in the global namespace
is deprecated. Please use <boost/bind/bind.hpp> + using namespace
boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain
the current behavior. »
otherwise, with a recent Boost:
/usr/include/boost/bind.hpp:36:1: note: « #pragma message: The practice of declaring the Bind placeholders (_1, _2, ...) in the global namespace is deprecated. Please use <boost/bind/bind.hpp> + using namespace boost::placeholders, or define BOOST_BIND_GLOBAL_PLACEHOLDERS to retain the current behavior. »