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Boost:Log

bjam build command

You can define configuration macros in the bjam command line, like this: 

$ bjam --with-log variant=release define=BOOST_LOG_WITHOUT_EVENT_LOG define=BOOST_LOG_USE_WINNT6_API stage

File name format

파일명에 날짜_시간_넘버링을 적용하고 싶을 경우 아래와 같이 입력하면 된다. 

keywords::file_name = "app%Y%m%d_%H%M%S_%5N.log"

Severity format attribute

Format에 %Severity%속성을 사용하고 싶을 경우 아래와 같이 적용하면 된다. 

#include <boost/log/utility/setup/formatter_parser.hpp>
// ...
boost::log::register_simple_formatter_factory< boost::log::trivial::severity_level, char >("Severity");

Common attributes

Format에서 %TimeStamp%와 같은 기본 속성을 사용하고 싶을 경우 아래와 같이 초기화 해야 한다. 

#include <boost/log/utility/setup/common_attributes.hpp>
// ...
logging::add_common_attributes();

Custom sink

Simple example: 

#include <boost/log/trivial.hpp>
#include <boost/log/sinks/basic_sink_backend.hpp>
#include <boost/log/attributes/value_extraction.hpp>
#include <boost/log/sinks/async_frontend.hpp>
// ...
class app_launcher: public boost::log::sinks::basic_formatted_sink_backend<char,
        boost::log::sinks::synchronized_feeding>
{
public:
    // The function consumes the log records that come from the frontend
    void consume(boost::log::record_view const& rec, string_type const& command_line)
    {
        std::cout << command_line << std::endl;
    }
};
// ...
typedef sinks::synchronous_sink<app_launcher> sink_t;
boost::shared_ptr<sink_t> sink(new sink_t());
boost::shared_ptr<boost::log::core> logc = boost::log::core::get();
logc->add_sink(sink);

Warning

BOOST_LOG_WITHOUT_EVENT_LOG

In case if message compiler detection fails for some reason, you can explicitly disable support for event log backend by defining the BOOST_LOG_WITHOUT_EVENT_LOG configuration macro when building the library.

BOOST_LOG_USE_WINNT6_API

Affects compilation of both the library and users' code. This macro is Windows-specific. If defined, the library makes use of the Windows NT 6 (Vista, Server 2008) and later APIs to generate more efficient code. This macro will also enable some experimental features of the library. Note, however, that the resulting binary will not run on Windows prior to NT 6. In order to use this feature Platform SDK 6.0 or later is required.

Troubleshooting

Boost.log를 사용하면서 발생하는 문제점 및 해결 방법을 정리한다.

swprintf not declared

MinGW를 사용할 경우 아래와 같은 메시지가 출력될 수 있다. 

c:\qt\2010.04\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:159: error:
'::swprintf' has not been declared
c:\qt\2010.04\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:166: error:
'::vswprintf' has not been declared

이 경우 stdio.h앞에 아래와 같이 입력한다. 

#undef __STRICT_ANSI__

undefined reference to boost::detail::set_tss_data

See also: Boost:Thread#Troubleshooting

See also

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Documentation

Example