Hi, I'm currently building a static library in Visual Studio 2008 using Boost 1.34.1. This static library is for my own personal game engine, which internally also uses several parts of boost. Two in particular I'm using is Boost.Signals and Boost.Python. I like for my static library to link in the boost libraries so that every project that uses my engine won't have to include those libraries manually. However, I find that by doing so I get tons of linker warnings when building my static library. One of which is below: "boost_signals-mt-gd.lib(boost_signals-mt-gd.dll) : warning LNK4006: __NULL_IMPORT_DESCRIPTOR already defined in boost_python_debug.lib(boost_python_debug.dll); second definition ignored" When I'm linking both of these libraries together during an executable build, I do not get these warnings. I don't understand why I'm getting these warnings in a static lib but not an executable when I'm including the very same libraries together. Any tips to resolve the warnings? Thanks.