Compiling is very noisy with warnings. It’d be great to clean this up before the next release.
/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.’