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Asked: 2026-06-12T23:49:28+00:00

I have a project that we are looking to port from Visual studio 6

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I have a project that we are looking to port from Visual studio 6 to Visual Studio 2010.

The project relies on a 3rd party .LIB file that is pre-compiled. This 3rd party library only contains the .H header files (no .CPP files)

I have just done a quick imprt into a visual studio 2010 solution and I am getting lots of errors at link time!

Some of these errors refer to the 3rd party .lib file “ServerToolkitRuntimeLIB.LIB”

Here is small snippit from the output of my build:

1>ServerToolkitRuntimeLIB.LIB(SerialIO.obj) : error LNK2001: unresolved external symbol "void  __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ)
1>ServerToolkitRuntimeLIB.LIB(OPCConversions.obj) : error LNK2001: unresolved external symbol "void __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ)
1>ServerToolkitRuntimeLIB.LIB(OPCMemoryAS.obj) : error LNK2001: unresolved external symbol "void __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ)
1>ServerToolkitRuntimeLIB.LIB(OPCAddressSpace.obj) : error LNK2001: unresolved external symbol "void __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ)
1>ServerToolkitRuntimeLIB.LIB(OPCServer.obj) : error LNK2001: unresolved external symbol "void __cdecl std::_Xlen(void)" (?_Xlen@std@@YAXXZ)

Am I at a loose end here without the source to rebuild the 3rd party library or could there be something else going on here?

Thank you in advance.

EDIT: The 3rd party .lib was originally compiled in Visual Studio 6.0

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1 Answer

  1. Editorial Team

    If you have VS6 you could try to produce a DLL there, linking to that .lib file you have, and exporting the necessary symbols.

    Then you could link that dll dynamically in your VS 2010 project without using the .lib

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