The docs says For instructions on how to build only specific variants, please ask on the Boost.Build mailing list. but I gmane gives a 411 for Boost.Build so I ask the question here. For 1.60.0 I used this cd modular-boost rem call .\bootstrap .\b2 headers .\b2 toolset=msvc variant=debug address-model=32 link=static threading=multi runtime-link=shared .\b2 toolset=msvc variant=release address-model=32 link=static threading=multi runtime-link=static Has this changed? -- Fredrik Stax\"ang | rot13: sfgk@hcqngr.hh.fr This is all you need to know about vi: ESC : q ! RET