My project setting uses "Multi-threaded DLL (/MD)" in code gen, and links to "libboost_unit_test_framework-vc71-mt-sgdp.lib" in debug mode. My purpose was to use STLport in a DLL, but the whole Boost statically linked. (I know I can link with "libboost_unit_test_framework-vc71-mt-gdp.lib," but I want Boost to be statically linked.)
You must link to a Boost lib that uses the same runtime as both your project and STLport, for: /MD use libboost_unit_test_framework-vc71-mt-p.lib /MDd use libboost_unit_test_framework-vc71-mt-gdp.lib Both of these are static libraries BTW, dll import libraries don't have the "lib" prefix to them. BTW I strongly recomend that you use /MDd for debug builds, using /MD and then the IDE defining _DEBUG can casue problems with third party libs including Boost and STLport. Finally remember that Boost debug libraries are built with __STL_DEBUG defined: you'll need to define this in your own code in order to link against them. John.