共享库中的Boost日志通道过滤在linux上没有按预期工作

我有一个Linux和Windows的可执行文件，有三个dll/共享库，我使用boost.log进行日志记录。我希望有一个单独的，文件日志为每个模块。我的方法是为每个模块创建一个severity_channel_logger_mt，在一个单例中为每个模块构造一个通道名。

class LogSingleton final
{
  src::severity_channel_logger_mt<logging::trivial::severity_level, std::string> slg_;
...
protected:
  LogSingleton() : slg_(boost::log::keywords::channel = "ModuleOne") {}
public:
  src::severity_channel_logger_mt<logging::trivial::severity_level, std::string>& logger() { return slg_; }
...
};    

每个模块在初始化时创建自己的文件接收器，并设置通道过滤器，以便只有该模块的日志消息才能到达该接收器。

logging::add_file_log(logging::keywords::file_name = "module_one.log",
  logging::keywords::open_mode = std::ios::app,
  ->set_filter(logging::trivial::severity >= level 
    && expr::attr< std::string >("Channel") == "ModuleOne");

然后我创建了我自己的模块特定的日志记录宏，它传递给正确的记录器。

#define BLOG(lvl)  BOOST_LOG_STREAM_WITH_PARAMS((LogSingleton::instance()->logger()), (::boost::log::keywords::severity = ::boost::log::trivial::lvl))

的用法如下:

BLOG(info) << "Hello world";

虽然在Windows日志工作如预期，在Linux上的日志文件为moduleleone(初始化第一)和ModuleThree(初始化第三)没有收到任何日志消息。module2日志正确。除了日志接收器文件名、通道名和单例的类名之外，所有三个模块的日志代码是相同的。

我想知道问题是否与我的宏，但欢迎任何想法，以及对方法的评论。

我把这个问题简化为一个最小的例子，都在一个可执行文件中。共享库的问题是一个误导。问题似乎是，如果我在单例中创建severity_channel_logger，日志记录将失败。如果我使用本地记录器，日志记录工作。即使我在单例中创建了一个日志记录器而不使用它，它也会阻止本地日志记录器工作。尽管对代码进行了跟踪，但我不明白为什么会发生这种情况。(平台= Fedora 21, gcc 4.9.2, boost 1.58)

#include <boost/config.hpp> 
#include <boost/filesystem.hpp>
#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/sources/severity_feature.hpp>
#include <boost/log/sources/severity_channel_logger.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/expressions/formatters/date_time.hpp>
#include <boost/log/support/date_time.hpp>
#include <boost/log/attributes/current_thread_id.hpp>
#include <boost/log/utility/setup/file.hpp>
#include <boost/log/utility/setup/console.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
namespace logging = boost::log;
namespace expr = boost::log::expressions;
namespace src = boost::log::sources;
namespace fs = boost::filesystem;
class LogSingleton
{
    src::severity_channel_logger<logging::trivial::severity_level, std::string> slg_;
    static LogSingleton* instance_;
    LogSingleton(const LogSingleton&);
    LogSingleton& operator=(const LogSingleton&);
protected:
    LogSingleton() : slg_(boost::log::keywords::channel = "Core") {}
public:
    src::severity_channel_logger<logging::trivial::severity_level, std::string>&  logger()
    {
        return slg_;
    }
    static LogSingleton* instance()
    {
        if (!instance_)
        {
            instance_ = new LogSingleton;
        }
        return instance_;
    }
};
LogSingleton* LogSingleton::instance_ = nullptr;
// 1. doesn't work
//#define BLOG(lvl)  BOOST_LOG_STREAM_WITH_PARAMS((LogSingleton::instance()->logger()), (::boost::log::keywords::severity = ::boost::log::trivial::lvl))
// access to logger via reference. Works if it is passed a ref to logger declared in main. Doesn't work if it is ref to logger in singleton
#define BLOG(lvl)  BOOST_LOG_STREAM_WITH_PARAMS((rlogger), (::boost::log::keywords::severity = ::boost::log::trivial::lvl))
int main(int argc, char **argv)
{
    logging::add_common_attributes();
    logging::trivial::severity_level level = logging::trivial::trace;
        auto formatter = expr::stream
        << "[" << expr::format_date_time<boost::posix_time::ptime>("TimeStamp", "%Y-%m-%dT%H:%M:%S.%f")
        << "] (" << logging::trivial::severity
        << "): " << expr::message;
    fs::path plog = fs::system_complete(fs::path(".."));
    if (!fs::exists(plog) || !fs::is_directory(plog))
        throw std::invalid_argument("Log directory doesn't exist, or path isn't a directory");
    plog /= "core.log";
    logging::add_file_log(logging::keywords::file_name = plog.string(),
        logging::keywords::open_mode = std::ios::app,
        logging::keywords::format = formatter)
        ->set_filter(logging::trivial::severity >= level &&    expr::attr< std::string >("Channel") == "Core");
    // this works with rlogger macro variant
    src::severity_channel_logger<logging::trivial::severity_level, std::string> logger(boost::log::keywords::channel = "Core");
    auto& rlogger = logger;
    // 2. this doesn't work, with same macro
    //auto& rlogger = LogSingleton::instance()->logger();
    // 3. just creating the singleton, before or after the creation of the local logger, stops logging from working
    //LogSingleton::instance();
    BLOG(info) << "Hello world";
    return 0;
}

当前编写时，此示例使用本地日志记录器。注释标记为1——这是使用单例日志直接(失败)的宏的变体。此外，注释掉本地日志记录器并启用对单例的引用将演示该问题。(注释2).注释3显示，仅仅创建一个单例记录器会导致通过本地记录器进行日志记录失败。