I see that several boost libraries can be compiled as dll files. I'd like to know if there's any concern about binary compatilibity between different versions of those dll's as boost's version number (and possibly the library itself) changes. For instance, whenever MFC's dll binary interface changes, we have another library version written in it's name (MFC42.dll, MFC70.dll, MFC71.dll...), this way we can help avoiding "dll hell". It would be also cool to link a version resource in each dll. This way, installers would check if a newer dll exists in the system, avoiding overwriting with an older one. And one last thing... the import library of date_time's dll isn't being generated, making it unusable. It's better to delete the dll target of its jamfile. If any help of my part is needed, I'd be glad to help. regards, rod