Hi, I've successfully built Boost 1.34 with MS Visual C++ "Orcas" Express Edition. To do so I've modified msvc.jam and visualc.hpp. Here the patch files for all of you interested. --- msvc.jam 2007-05-13 07:37:48.562500000 -0300 +++ msvc.jam 2007-05-12 13:10:57.734375000 -0300 @@ -231,6 +231,10 @@ local rule configure-really ( { # Even if version is not explicitly specified, try to detect the version # from the path. + if [ MATCH "(Microsoft Visual Studio 9.0)" : $(command) ] + { + version = 9.0 ; + } if [ MATCH "(Microsoft Visual Studio 8)" : $(command) ] { version = 8.0 ; --- visualc.hpp 2006-01-13 04:48:08.000000000 -0200 +++ visualc.hpp 2007-05-12 13:07:19.500000000 -0300 @@ -168,8 +168,8 @@ #error "Compiler not supported or configured - please reconfigure" #endif // -// last known and checked version is 1400 (VC8): -#if (_MSC_VER > 1400) +// last known and checked version is 1500 (VC9): +#if (_MSC_VER > 1500) # if defined(BOOST_ASSERT_CONFIG) # error "Unknown compiler version - please run the configure tests and report the results" # else Regards, josuegomes at gmail dot com