How can I deal with this LNK2005 error?

[jerryok]

This is some error ocurred when linking my project, all errors and warnings are listed below:

JRtest error LNK2005: __afxForceSTDAFX already defined in mfcs71d.lib(stdafx.obj)
JRtest fatal error LNK1169: one or more multiply defined symbols found
JRtest warning LNK4098: defaultlib 'mfc71.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
JRtest warning LNK4098: defaultlib 'mfcs71.lib' conflicts with use of other libs; use /NODEFAULTLIB:library
JRtest warning LNK4098: defaultlib 'MSVCRT' conflicts with use of other libs; use /NODEFAULTLIB:library

Who can help me about this, thank you very much!

[cilu]

__afxForceSTDAFX is defined more than once, probably because you linked with two libraries, each of them defining it.

Here is from MSDN:

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.