Hello, So here is the question: "Is there any interest in a logging library for boost?" John Torjo did not answer my mail, beside I looked at pantheios. it seems a little bit complex... My idea is that a logging library should be _simple_ to use. Here is a small example: // snippet on #include <fstream> #include <boost/logging.hpp> int main(int argc, char **argv) { BOOST_LOG_INIT(("[" >> boost::logging::level >> "]," >> boost::logging::filename >> "(" >> boost::logging::line >> ")," >> boost::logging::time >> "," >> boost::logging::trace >> boost::logging::eol), // log format 2); // log level BOOST_LOG_ADD_OUTPUT_STREAM(new std::ofstream("./output.log")); BOOST_LOG_ADD_OUTPUT_STREAM(&std::cout); BOOST_LOG(1, "something"); BOOST_LOG(2, "something else"); BOOST_LOG(3, "doesn't matter"); char you_want[256] = "you want"; BOOST_LOG(1, "Let's say " << you_want << " to display " << 2); return 0; } // snippet off You can find the first draft of a logging library in the boost Sandbox vault. It consists of a header files, some examples and documentation. Put the file at your boost root folder and unzip it. It compiles with msvc and vc-8_0. I'll try with gcc asap. So let me know if you think it worth something or not. JD