Hello, I just tried to upgrade from boost 1.33 to 1.34.1 In the old boost version you can use -sTOOLS=msvc_71-stlport -sSTLPORT_VERSION=51.4 .,...... It's seemd that the syntac has changed but .. you can not find this changes in the documentation. Can some one help me how i can compile boost 3.1.4 with MS VC7.1 and stlport ??? bye bernd -- Bernd Martin Wollny TRIOPTICS GmbH - www.trioptics.com b.wollny@trioptics.com Hafenstrasse 39, 22880 Wedel/GERMANY Software Designer Geschäftsführer: Dipl.-Ing. Eugen Dumitrescu phone / fax: +49 (0)4103 18006-26 /-20 Amtsgericht Pinneberg HRB 3215 All E-Mails from bm.wollny@trioptics.com are digital signed. If you get a unsigned E-Mail, this E-Mail are a fake. Look at http://www.gnupg.org .