Hey, Why has the iostreams::file_descriptor constructor taking a file descriptor (OS handle) being deprecated (BOOST_IOSTREAMS_USE_DEPRECATED)? This seems to be somewhat counter-intuitive to me. Even more as our code depends on this functionality and I see no way to rewrite it in order to accommodate for this change (we're wrapping a pipe handle here). The worst is that defining BOOST_IOSTREAMS_USE_DEPRECATED while compiling our application makes the compilation succeed, but linking fails as this function has not been compiled by default into the iostreams library. Regenerating the boost libraries is not an option for us, as we need to rely on pre-installed libraries most of the time (HPC systems have their own weird rules...). Any ideas? Regards Hartmut --------------- http://boost-spirit.com