This happened to me a few months ago when trying out a Windows 8 compiling setup with Code::Blocks. I pointed to the release branch of Boost, which should be set to 1.53. I included Boost.Test, I think by #including boost/test/include/unit_test.hpp so everything comes in without linking in the library directly. There was some sort of error involving "putenv," not sure what anymore. I "fixed" it by switching to the trunk branch. Now I'm trying a new setup, with Eclipse. This time I'm adding Boost.Test by adding the files directly to the project list. (I'm experimenting with splitting my tests into 3 files.) I'm referencing the release branch again, which should still be on 1.53. I got "'putenv' was not declared in scope" error. It's at Line 95 of boost/test/utils/runtime/config.hpp. Did a hard error sneak by everyone, or is my setup incomplete? Both IDE setups use G++ on MinGW for the compiler. Is there some #define I'm missing? Should I switch to using the trunk again? Daryle W.