Re: [Boost-users] HOWTO: Building Boost for Windows 64-bit

I don't think define=arch:SSE2 has the effect you think it does; rather, I believe what you want is cxxflags="-arch:SSE2". Also note that -arch has no effect on 64-bit compilations, so it can be ommitted from the address-model=64 bjam invocations.