Re: Linking error while using a std::list of exported class

Ulrich Eckhardt <>
Mon, 23 Feb 2009 09:40:38 +0100
Faisal wrote:

I've a class CPage which is exported from a regular dll.


class FILEIO_API CPage
//class members and functions

I want to use this class in another dll.

#include "Page.h"

void CPageImage::Draw(CTGraphics& g)
list<CPage*> p;

You are not using that class here, in fact instead of including the header
it would have been enough to just forward-declare the class.

1>PageImage.obj : error LNK2019: unresolved external symbol "__declspec
(dllimport) public: __thiscall std::list<class CPage *,class
std::allocator<class CPage *> >::~list<class CPage *,class
std::allocator<class CPage *> >(void)"

It is missing the destructor for class std::list<CPage*>. For some reason,
it seems to assume that you intended to import that definition from a DLL,
but you don't do that normally; rather, the destructor is inline. I guess
you have misused the FILEIO_API macro somewhere.

Doesn't it possible to create a list of exported class?

Yes it works.


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