链接器错误 - 未定义的符号

Posted 2023-02-16

【中文标题】链接器错误 - 未定义的符号

【英文标题】：Linker error - Undefined symbols

【发布时间】：2015-11-30 12:01:44

【问题描述】：

问候

我已经在VS2013 (1.2.0-rc3) 中下载并编译了log4cplus。编译很好（调试和发布）我尝试在我的代码中使用它，但我得到很多链接错误，我尝试过的任何事情都没有删除它们。我正在使用 log4cplus 项目中的相同包含，以及我编译的库，我仍然得到这些。

1>------ Build started: Project: MYPROJECT, Configuration: Debug Win32 ------
1>utility.cpp.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>utility.cpp.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>device.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>path_tree.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>cim_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>pin_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>nautilus.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>ravis.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>ncr.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>wincore.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>atm_utility.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>banqit.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>grg.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>king_teller.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>supervisor_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>registry_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>device_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>atm_factory.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>database_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>user_interface.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)
1>fit_manager.obj : error LNK2001: unresolved external symbol "public: static class log4cplus::Logger __cdecl log4cplus::Logger::getInstance(class std::basic_string<unsigned short,struct std::char_traits<unsigned short>,class std::allocator<unsigned short> > const &)" (?getInstance@Logger@log4cplus@@SA?AV12@ABV?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@@Z)

我在这里缺少什么？！

提前致谢

【参考方案1】：

找到问题了！！

我必须在我的项目CMakeLists.txt 中将/Zc:wchar_t 设置为set_target_properties。

set_target_properties(MYPROJECT PROPERTIES COMPILE_FLAGS "/W2 /Zc:wchar_t")