Building .mexw64 files from c++ dlls

I want to use C++ DLLs in Matlab. I did all Installations that are required for my Matlab 2010b Version ( Requirements for 64 Bit Compilers): Windows SDK 6.1, Visual Studio C++ 2008 Express SP1 with all required installation points like 64 Bit compilers etc.

When I now use loadlibrary

fullpathToHeader = 'C:\Users\huellinghorst\Documents\MATLAB\ImagerIPC2.h'; fullpathToDll = 'C:\Users\huellinghorst\Documents\MATLAB\ImagerIPC2.lib';

loadlibrary(fullpathToDll, fullpathToHeader);

I get the error

??? Error using ==> loadlibrary at 365 Failed to preprocess the input file. Output from preprocessor is:Der Befehl "cl" ist entweder falsch geschrieben oder konnte nicht gefunden werden. "The command "cl" is either spelled wrong or couldnt be found"

If I try to mex the files (mex -setup is linked to the 2008 VS) I get the following error:

Microsoft (R) Incremental Linker Version 9.00.21022.08 Copyright (C) Microsoft Corporation. All rights reserved.

ImagerIPC2.lib LINK : warning LNK4001: no object files specified; libraries used LINK : error LNK2001: unresolved external symbol mexFunction C:\Users\HUELLI~1\AppData\Local\Temp\mex_JP_oqF\templib.x : fatal error LNK1120: 1 unresolved externals

C:\PROGRA~1\MATLAB\R2010B\BIN\MEX.PL: Error: Link of 'ImagerIPC2.mexw64' failed.

??? Error using ==> mex at 208 Unable to complete successfully.

While the mex example yprime.c works, my c++ files are linked wrongly. Can anybody help me?

The DLLs, Header and Library files are attached.

Thanks in advance!

[Philip Borghesani]

The attached file appears to be in 7z format. Was it created with 7 zip and renamed? Winzip 12.1 could not open it.

Answer 1

[Philip Borghesani]

There are a many things going wrong here but the biggest problem is that you have a 32 bit dll and 64 bit MATLAB. That will not work, you will need to install 32 bit MATLAB or get a 64 bit copy of the dll.

Second problem: In MATLAB versions prior to R2011a loadlibrary did not make use of mex -setup and could only use the full version of Visual Studio for loading a 64 bit library.

This library has many functions that make use of c callbacks you may not be able to use it without writing your own mex file because callbacks are not supported by loadlibrary. Writing a mex file that can properly use c callbacks and transfer the data back to MATLAB is not a trivial undertaking.

[Stefan]

Ok thanks for the answer, I organized the x64 dlls and upgraded to Matlab 2014b. Loadlibrary (Using Windows SDK 7.1 as compiler) has problems with the datatypes and a lot of expressions, it seems ther is no compilation made.

What would be your suggestion to realize my approach? Im not really good at C++, you think its realistic to write a wrapper within 2 weeks not really having knowledge in c++?