Solved this by adding define=BOOST_USE_WINDOWS_H and that forces the include of windows.h and as such the different types of InterlockedIncrement.

I tried that and it worked until I realized that including windows.h causes me lots of troubles in another library (wxWidgets) so that I cannot use this solution. What is in windows.h that should be copied in interlocked.hpp? I start to be desperate to build a 64 bit version of my program with mingw-w64... also, it is difficult because I have absolutly no idea of what these interlocked... mean. Regards, Frédéric