#include <cstdlib>

#include <boost/log/trivial.hpp>

#include <boost/log/core.hpp>

#include <boost/log/sources/global_logger_storage.hpp>

#include <boost/log/sources/severity_logger.hpp>

#include <boost/log/sources/record_ostream.hpp>

#include <boost/log/sources/severity_feature.hpp>

// Here we define our application severity levels.

enum severity_level

{

    normal,

    notification,

    warning,

    error,

    critical

};

// The formatting logic for the severity level

template< typename CharT, typename TraitsT >

inline std::basic_ostream< CharT, TraitsT >& operator<< (std::basic_ostream< CharT, TraitsT >& strm, severity_level lvl)

{

    static const char* const str[] =

    {

        "normal",

        "notification",

        "warning",

        "error",

        "critical"

    };

    if (static_cast<std::size_t>(lvl) < (sizeof(str) / sizeof(*str)))

        strm << str[lvl];

    else

        strm << static_cast<int>(lvl);

    return strm;

}

//  Global logger declaration

BOOST_LOG_INLINE_GLOBAL_LOGGER_DEFAULT(test_lg,

    boost::log::sources::severity_logger_mt<severity_level>)

void try_logging()

{

    boost::log::sources::severity_logger_mt<severity_level>& lg = test_lg::get();

    // TODO:

    // always write "info" record, Unknown reason!

    BOOST_LOG_SEV(lg, normal) << "This is a normal severity record";

    BOOST_LOG_SEV(lg, notification) << "This is a notification severity record";

    BOOST_LOG_SEV(lg, warning) << "This is a warning severity record";

    BOOST_LOG_SEV(lg, error) << "This is a error severity record";

    BOOST_LOG_SEV(lg, critical) << "This is a critical severity record";

}

int main(int argc, char* argv[])

{

    try_logging();

    return EXIT_SUCCESS;

}

[2015-01-14 19:00:34.800935] [0x40000300] [info]    This is a normal severity re

cord

[2015-01-14 19:00:34.805935] [0x40000300] [info]    This is a notification sever

ity record

[2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a warning severity r

ecord

[2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a error severity rec

ord

[2015-01-14 19:00:34.806935] [0x40000300] [info]    This is a critical severity

record