// argv[1] contains full path to our plugin library

boost::dll::fs::path shared_library_path = /*<-*/ b2_workarounds::first_lib_from_argv(argc, argv); /*->*/ //=argv[1];

// loading library and getting a function from it

std::function<void(const callback_t&)> on_unload = boost::dll::import_alias<void(const callback_t&)>(

shared_library_path, "on_unload"

);

on_unload(&print_unloaded); // adding a callback

std::cout << "Before library unload." << std::endl;

// Releasing last reference to the library, so that it gets unloaded

on_unload = {};

std::cout << "After library unload." << std::endl;