如何修复静态库？

Question

我试图学习如何调试静态库，我试图解决特别是JsonCpp。

我可以使用什么项目设置来查看Visual Studio中输出窗口中的确切链接？

============================================== ====================================

下面是我收到的错误：

Error 1 error LNK2005: "public: __thiscall std::_Lockit::~_Lockit(void)" (??1_Lockit@std@@QAE@XZ) already defined in libcpmtd.lib(xlock.obj) msvcprtd.lib 

Error 2 error LNK2005: "public: __thiscall std::_Lockit::_Lockit(int)" (??0_Lockit@std@@QAE@H@Z) already defined in libcpmtd.lib(xlock.obj) msvcprtd.lib 

Error 3 error LNK2005: "void __cdecl std::_Debug_message(wchar_t const *,wchar_t const *,unsigned int)" (?_Debug_message@std@@YAXPB_W0I@Z) already defined in libcpmtd.lib(stdthrow.obj) msvcprtd.lib 

Error 4 error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::~basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(void)" (??1?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@XZ) already defined in Core.obj msvcprtd.lib 

Error 5 error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(char const *)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@PBD@Z) already defined in Core.obj msvcprtd.lib 

Error 6 error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ABV01@@Z) already defined in Core.obj msvcprtd.lib 

Error 7 error LNK2005: "public: char const * __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::c_str(void)const " (?c_str@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEPBDXZ) already defined in Core.obj msvcprtd.lib 

Error 8 error LNK2005: "public: void __thiscall std::_Container_base_secure::_Orphan_all(void)const " (?_Orphan_all@_Container_base_secure@std@@QBEXXZ) already defined in Core.obj msvcprtd.lib 

Error 9 error LNK2005: "public: __thiscall std::_Container_base_secure::~_Container_base_secure(void)" (??1_Container_base_secure@std@@QAE@XZ) already defined in Core.obj msvcprtd.lib 

Error 10 error LNK2005: "public: __thiscall std::_Container_base_secure::_Container_base_secure(void)" (??0_Container_base_secure@std@@QAE@XZ) already defined in Core.obj msvcprtd.lib 

Error 11 error LNK2005: "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::operator=(char const *)" (??4?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@PBD@Z) already defined in libcpmtd.lib(locale0.obj) msvcprtd.lib 

Error 12 error LNK2005: "public: __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >(unsigned int,char)" (??0?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAE@ID@Z) already defined in Serialization.obj msvcprtd.lib 

Error 13 error LNK2005: "public: unsigned int __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::size(void)const " (?size@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QBEIXZ) already defined in Core.obj msvcprtd.lib 

Error 14 error LNK2005: "public: void __thiscall std::basic_ios<char,struct std::char_traits<char> >::setstate(int,bool)" (?setstate@?$basic_ios@DU?$char_traits@D@std@@@std@@QAEXH_N@Z) already defined in Serialization.obj msvcprtd.lib 

Error 15 error LNK2005: "public: static bool __cdecl std::char_traits<char>::eq_int_type(int const &,int const &)" (?eq_int_type@?$char_traits@D@std@@SA_NABH0@Z) already defined in Serialization.obj msvcprtd.lib 

Error 16 error LNK2005: "public: static int __cdecl std::char_traits<char>::eof(void)" (?eof@?$char_traits@D@std@@SAHXZ) already defined in Serialization.obj msvcprtd.lib 

Error 17 error LNK2005: "public: static unsigned int __cdecl std::char_traits<char>::length(char const *)" (?length@?$char_traits@D@std@@SAIPBD@Z) already defined in Core.obj msvcprtd.lib 

Error 18 error LNK2005: _malloc already defined in LIBCMTD.lib(dbgmalloc.obj) MSVCRTD.lib 

Error 19 error LNK2005: _free already defined in LIBCMTD.lib(dbgfree.obj) MSVCRTD.lib 

Error 20 error LNK2005: "public: virtual __thiscall std::exception::~exception(void)" (??1exception@std@@UAE@XZ) already defined in LIBCMTD.lib(stdexcpt.obj) MSVCRTD.lib 

Error 21 error LNK2005: "public: __thiscall std::exception::exception(void)" (??0exception@std@@QAE@XZ) already defined in LIBCMTD.lib(stdexcpt.obj) MSVCRTD.lib 

Error 22 error LNK2005: "public: __thiscall std::exception::exception(class std::exception const &)" (??0exception@std@@QAE@ABV01@@Z) already defined in LIBCMTD.lib(stdexcpt.obj) MSVCRTD.lib 

Error 23 error LNK2005: _strchr already defined in LIBCMTD.lib(strchr.obj) MSVCRTD.lib 

Error 24 error LNK2005: __invalid_parameter already defined in LIBCMTD.lib(invarg.obj) MSVCRTD.lib 

Error 25 error LNK2005: __CrtDbgReportW already defined in LIBCMTD.lib(dbgrptw.obj) 
MSVCRTD.lib 

Error 26 error LNK2005: "public: __thiscall std::exception::exception(char const * const &)" (??0exception@std@@QAE@ABQBD@Z) already defined in LIBCMTD.lib(stdexcpt.obj) MSVCRTD.lib 

Error 27 error LNK2005: _memmove_s already defined in LIBCMTD.lib(memmove_s.obj) MSVCRTD.lib 

Error 28 error LNK2005: _sprintf already defined in LIBCMTD.lib(sprintf.obj) MSVCRTD.lib 

Error 29 error LNK2005: _sprintf_s already defined in LIBCMTD.lib(sprintf.obj) MSVCRTD.lib 

Error 30 error LNK2005: _strpbrk already defined in LIBCMTD.lib(strpbrk.obj) MSVCRTD.lib 

Error 31 error LNK2005: "private: __thiscall type_info::type_info(class type_info const &)" (??0type_info@@AAE@ABV0@@Z) already defined in LIBCMTD.lib(typinfo.obj) MSVCRTD.lib 

Error 32 error LNK2005: "private: class type_info & __thiscall type_info::operator=(class type_info const &)" (??4type_info@@AAEAAV0@ABV0@@Z) already defined in LIBCMTD.lib(typinfo.obj) MSVCRTD.lib 

Warning 33 warning LNK4098: defaultlib 'MSVCRTD' conflicts with use of other libs; use /NODEFAULTLIB:library Afterfuture Game Engine 

Error 34 fatal error LNK1169: one or more multiply defined symbols found C:\Users\Blake\Desktop\Afterfuture\Afterfuture Game Engine\Debug\Afterfuture Game Engine.exe 

Answer 1

问题是，您将相同库的两个不同版本链接在一起。如果库静态链接到标准C库的调试版单线程版本，则使用该库的应用程序不能动态链接到同一运行时库的发行版，即多线程版本。

否则，你风了，例如，两种不同的内存分配器和混乱，如果内存是从一个分配的，但返回到另一个。因此，即使链接器允许您这样做，应用程序也无法安全地与库进行互操作 - 那么重要的是什么？

假设磁带库已静态链接到标准C库的多线程版本和应用程序动态链接到单线程版本。如果库在应用程序分配的对象上调用delete，并且库的分配器必须释放对象（尽管从未分配过一个对象），会发生什么情况？

没有办法使这项工作可靠。将所有内容静态链接到完全相同的静态库或动态链接所有内容。 （这基本上是动态链接是首选的原因。否则，您必须在同一时间链接所有库和应用程序或者是非常小心。）认为自己是幸运的符号相撞，你得到了一个警告。