[Boost-users] 32- and 64-bit builds on same machine

Hi, What is the most convenient way to build Boost if I need both 32- and 64-bit builds on the same Windows machine? I could of course install two separate copies of the entire Boost source tree, and build one from the 32-bit Visual studio command prompt, and the other from the 64-bit Visual Studio command prompt. But that seems a bit wasteful. I tried building from the same source tree twice, once using the 32-bit command prompt and once using the 64-bit command prompt, but that did not work. (Nothing happened during the second build.) Thank you, Johan Råde