STL Link Errors converting from VC7 to VC8

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Bruce - 28 Nov 2006 03:19 GMT

I am converting a DLL project from VC7 to VC8. The project is a managed
C++ DLL. The project uses a non managed C++ library compiled an
linked in VC7 which uses the STL.

I just about got everything to link with the exception of some STL link
errors.

Here is an example of one of the errors:

error LNK2001: unresolved external symbol "public: void __thiscall
std::_String_base::_Xran(void)const

How do I resolve this?

Bruce

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Carl Daniel [VC++ MVP] - 28 Nov 2006 06:16 GMT

> I am converting a DLL project from VC7 to VC8. The project is a
> managed C++ DLL. The project uses a non managed C++ library
[quoted text clipped - 9 lines]
>
> How do I resolve this?

Recompile the native C++ library (or is it a DLL?) with VC8. In general,
you can't mix C++ standard library versions in a single link, nor can you
transport Standard Library objects (like std::string) across a DLL boundary
if there are different versions on the two sides (e.g. use VC7 to compile a
DLL and VC8 ot use it - likely won't work if there are std::string
parameters/return types to functions exported by the DLL).

-cd

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Bruce - 29 Nov 2006 02:57 GMT

> Recompile the native C++ library (or is it a DLL?) with VC8. In general,
> you can't mix C++ standard library versions in a single link, nor can you
[quoted text clipped - 4 lines]
>
> -cd

Thanks Carl.

It is not a DLL lib but a static lib. But I guess your information
still applies?

I do also have a VC& DLL version of the lib. It does not export
anything from STL. Should this lib still work from VC8?

Bruce

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STL Link Errors converting from VC7 to VC8

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