提升日志到文件不起作用

Question

我不明白为什么这个示例代码不能正常工作。我的编译器说被调用的函数不是声明的命名空间的成员。这是 Boost 日志的示例代码，为什么它不起作用？我需要做什么？

我已经定义了 BOOST_LOG_DYN_LINK，并且我已经包含了所有应该包含的 headers。此外，boost 是通过 yum 从 fedora repos 安装的，根据 yum，boost 版本是 1.55.0.

示例：http://www.boost.org/doc/libs/1_55_0/libs/log/example/doc/tutorial_file.cpp

错误

main.cpp:33:5: error: ‘add_file_log’ is not a member of ‘logging’
     logging::add_file_log(
     ^
main.cpp:34:10: error: ‘file_name’ is not a member of ‘keywords’
          keywords::file_name = "sample_%N.log",                                        /*< file name pattern >*/
          ^
main.cpp:35:10: error: ‘rotation_size’ is not a member of ‘keywords’
          keywords::rotation_size = 10 * 1024 * 1024,                                   /*< rotate files every 10 MiB... >*/
          ^
main.cpp:36:10: error: ‘time_based_rotation’ is not a member of ‘keywords’
          keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), /*< ...or at midnight >*/
          ^
main.cpp:36:49: error: ‘sinks::file’ has not been declared
          keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), /*< ...or at midnight >*/

代码

#include <boost/log/core.hpp>
#include <boost/log/trivial.hpp>
#include <boost/log/expressions.hpp>
#include <boost/log/sinks/text_file_backend.hpp>
#include <boost/log/utility/setup/file.hpp>
#include <boost/log/utility/setup/common_attributes.hpp>
#include <boost/log/sources/severity_logger.hpp>
#include <boost/log/sources/record_ostream.hpp>

namespace logging = boost::log;
namespace src = boost::log::sources;
namespace sinks = boost::log::sinks;
namespace keywords = boost::log::keywords;

void init()
{
    logging::add_file_log
    (
        keywords::file_name = "sample_%N.log",
        keywords::rotation_size = 10 * 1024 * 1024,
        keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0),
        keywords::format = "[%TimeStamp%]: %Message%"
    );

    logging::core::get()->set_filter
    (
        logging::trivial::severity >= logging::trivial::info
    );
}

进行调用

g++ -c -DBOOST_LOG_DYN_LINK -o main.cpp.o main.cpp

链接器标志：-lboost_program_options -lboost_log -lboost_filesystem -lboost_system -lboost_thread -lpthread

详细日志：https://gist.github.com/HSchmale16/d4dd5656a47ce82c63b2

Answer 1

我可以毫无错误地编译它，无需更改代码。检查您的 boost::log 来源以确保您拥有您期望的内容。我的猜测是您的 boost 文件已损坏。相信这个错误表明在编译器查找的地方找不到该函数。

Answer 2

检查您的头文件是否缺少任何内容，并将 -lboost_log_setup 添加到您的 compiler/linker 调用中。

提升日志到文件不起作用

Boost Log to File not working

c++

boost

boost-log

错误

代码

进行调用