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mfc linking

Posted on 2002-03-09
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Last Modified: 2013-11-20
Hi!
i wrote a graphical library (dxmanager.lib, based on direct 3d), it works perfectly with win32 apps, but if i try to use it with an mfc app, i got these 2 links error (by the way, i've never defined a "Lockit" method in my lib).

msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::_Lockit::~_Lockit(void)" (??1_Lockit@std@@QAE@XZ) already defined in dxmanager.lib(dxmanager.obj)

msvcprtd.lib(MSVCP60D.dll) : error LNK2005: "public: __thiscall std::_Lockit::_Lockit(void)" (??0_Lockit@std@@QAE@XZ) already defined in dxmanager.lib(dxmanager.obj)


could anyone help me?
regards, Ralph
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Question by:ralph78
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peterchen092700 earned 200 total points
ID: 6854277
Check the VC Runtime Library settings in your LIB match those you have with the MFC App (Project/Settings/C-C++/Code Generation: Use Run-time library)

LIB's default to "Single Threaded", but MFC required either "Multi Threaded DLL" or "Multi Threaded", depending on whenther you ling statically or dynamically to the MFC DLL's

(Though you usually get more than just two error messages on this)

std::_Lockit is an STL helper class for multithreading support, which gets a "do nothing" implementation in single-thread builds.

Peter

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by:ralph78
ID: 6914220
That's ok now!
thx, and sorry to be late ;-))

regards, Ralph
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