Hi, This question sounds similar to one I just asked over in 3rd-Party, but I think this is more appropiate to ask here. (It was also part of the reason for my confusion in the other matter.) In the Csound sources, there is one (add-on) module that uses the stdc++ list and vector mechanisms. It compiles OK (gcc4), but when the app tries to load it, it can't find the symbol: _ZNSt15_List_node_base7_M_hookEPS_ which decodes to std::_List_node_base::_M_hook(std::_List_node_base*) I've searched through the library, and though there are several " _ZNSt15_List_node..." entries, that one isn't there. I'm not clear how the whole template mechanism works, so maybe it should be constructed somewhere else? Or is our library missing something? Thanks, -- Pete --