b2 --toolset=msvc-12.0 address-model=64 variant=release --with-thread --with-chrono --with-date_timeb2 --toolset=msvc-12.0 address-model=64 variant
b2 --toolset=msvc-12.0 address-model=64 variant=release --with-thread --with-chrono --with-date_timeb2 --toolset=msvc-12.0 address-model=64 variant