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分享LNK2005的问题
将工程从VC6升级到Visual Studio 2005以后发现报了很多LNK2005的连接错误: LIBCMTD.lib(vsnprnc.obj) error LNK2005 _vsprintf_s already defined in msvcrtd.lib(MSVCR80D.DLL),这只是其中一个.都是说LIBCMTD.lib和msvcrtd.lib中的符号定义冲突,我在项目设置中修改了这两个库的连接顺序但是仍然会报这个错,唯一不同的是错误信息中两个库的位置交换了一下，请问各位高手如何解决？
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cleverwyq 2007-01-23
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symbol already defined in object
The given symbol, displayed in its decorated form, was multiply defined.
Possible causes
Accidentally linking with both the single-threaded and multithreaded libraries. Ensure that the application project file includes only the appropriate libraries and that any third-party libraries have appropriately created single-threaded or multithreaded versions.
Mixing static and dynamic libraries when also using /clr.
The symbol is a packaged function (created by compiling with /Gy) and was included in more than one file but was changed between compilations. Recompile all files that include symbol.
The symbol is defined differently in two member objects in different libraries, and both member objects were used.
An absolute is defined twice, with a different value in each definition.
A header file declared and defined a variable. Possible solutions include:
Declare the variable in .h: extern BOOL MyBool; and then assign to it in a .c or .cpp file: BOOL MyBool = FALSE;.
Declare the variable static.
Declare the variable selectany.
If you use uuid.lib in combination with other .lib files that define GUIDs (for example, oledb.lib and adsiid.lib). For example:
oledb.lib(oledb_i.obj) : error LNK2005: _IID_ITransactionObject
already defined in uuid.lib(go7.obj)
To fix, add /FORCE:MULTIPLE to the linker command line options, and make sure that uuid.lib is the first library referenced.
The given symbol, displayed in its decorated form, was multiply defined.
Possible causes
Accidentally linking with both the single-threaded and multithreaded libraries. Ensure that the application project file includes only the appropriate libraries and that any third-party libraries have appropriately created single-threaded or multithreaded versions.
Mixing static and dynamic libraries when also using /clr.
The symbol is a packaged function (created by compiling with /Gy) and was included in more than one file but was changed between compilations. Recompile all files that include symbol.
The symbol is defined differently in two member objects in different libraries, and both member objects were used.
An absolute is defined twice, with a different value in each definition.
A header file declared and defined a variable. Possible solutions include:
Declare the variable in .h: extern BOOL MyBool; and then assign to it in a .c or .cpp file: BOOL MyBool = FALSE;.
Declare the variable static.
Declare the variable selectany.
If you use uuid.lib in combination with other .lib files that define GUIDs (for example, oledb.lib and adsiid.lib). For example:
oledb.lib(oledb_i.obj) : error LNK2005: _IID_ITransactionObject
already defined in uuid.lib(go7.obj)
To fix, add /FORCE:MULTIPLE to the linker command line options, and make sure that uuid.lib is the first library referenced.
