Compiling C++ s-functions in MATLAB R2007b x86 on Windows 7 x64 Professional

Steps already taken:

1. Installed VS 2005 Express
2. Installed Win 7 SDK
3. Installed VS 2005 x86 Runtimes SP1 + MFC Security Update
4. Set the environment variable MSsdk to the SDK path.
5. Installed Borland 5.5 Compilers
6. Installed MinGW and Gnumex.

All the compilers will compile a C++ s function successfully. However, when trying to reference those files using an s function block I get an 'error obtaining sizes from Mex. Specified module could not be found'.

Has anyone successfully compiled a C++ s function on the set up described.

I must use 32 bit to be compatible with the work of my colleagues.

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Thanks in advance,

Craig

Answer 1

[Kaustubha Govind]

The 'Specified module could not be found' error usually means that you are missing one or more DLL dependencies. Please see if this solution helps you debug the issue: How do I profile my EXE or DLL file with Dependency Walker?

PS: The S-function MEX-file is really a DLL with a MEX-specific extension, so you can treat it like a DLL in debugging.

[Craig]

Hello, thanks for your prompt reply.

I typed the following at the command window:

!C:\Work\depends22_x64\depends.exe sfun_cppcount_cpp.cpp

Returning "No DOS or PE signature found. This file is not a valid 32-bit or 64-bit Windows module."

Then I tried

!C:\Work\depends22_x64\depends.exe sfun_cppcount_cpp.mexw32

Returning:

"Error: At least one required implicit or forwarded dependency was not found. Error: At least one module has an unresolved import due to a missing export function in an implicitly dependent module. Error: Modules with different CPU types were found. Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module."

I also have error opening file:

1. LIBGCC_S_DW2-1.DLL
2. LIBSTDC++-6.DLL
3. MSVCR80.DLL

My understanding of DLL's etc is pretty poor. I hope you can help me.

Best regards,

Craig

Answer 2

[Craig]

I think I found a dodgy solution. Please comment on this answer.

I used Windows search to find:

1. MSVCR80.dll in C:/Windows/winsxs/...
2. LIBSTDC++-6.dll in C:/Work/MinGW/bin
3. LIBGCC_S_DW2-1.dll in C:/Work/MinGW/bin

I copied and pasted these to the MATLAB current directory and the model ran successfully.

After recompiling using Visual Studio Express 2005 I only needed to copy and paste MSVCR80.dll into the current directory!

[Kaustubha Govind]

Instead of copying over the DLLs, it might be best to add their actual locations to the system PATH environment variable.