Dear mailing list, I am having some trouble building Boost 1.35.0, using gcc mingw 3.4.5. When building the serialization library, I get the following error message on many of the files: "wide char i/o not supported on this platform" The bjam command line I used is: bjam --build-dir="C:\boost_1_35_0\built" --toolset=gcc --with-serialization I've looked through some of the Boost configuration header files, and it seems that the BOOST_NO_STD_WSTREAMBUF value is not being #defined. (I was under the impression that gcc mingw 3.4.5 supports wide character i/o, is this correct?) Has anyone else had this problem, and is there a solution to getting serialization to build properly using my gcc compiler? Thanks very much, Markus.