New API in glibmm 2.64

Member Glib::build_filename (const String1 & elem1, const String2 & elem2, const Strings &... strings)

Member Glib::canonicalize_filename (StdStringView filename, StdStringView relative_to=nullptr)

Member Glib::get_host_name ()

Member Glib::get_user_runtime_dir ()

Member Glib::MainContext::get_thread_default ()

Member Glib::MainContext::pop_thread_default ()

Member Glib::MainContext::push_thread_default ()

Class Glib::StdStringView

Class Glib::UStringView