Compiling CUDA files with mexcuda - why wont Matlab accept my compiler?!

Im trying to compile CUDA files into mex.

Matlab ships with an example CUDA file located in matlabfolder\toolbox\distcomp\gpu\extern\src\mex, but when I try to compile it by typing:

mexcuda mexGPUExample.cu

I get:

   "Error using mex
  No supported compiler or SDK was found"

Im using the Microsoft Visual C++ 2015 Professional (C) compiler for both C and C++ but Ive also tried the MinGW64 Compiler and the Windows SDK 7.1 which all gives me the same error.

Im using the CUDA toolkit 8, and in Visual studio I can compile .cu files so I obviously have a supported compiler. How do I make Matlab realize that and allow me to compile .cu files?

Thanks.

Answer 1

[Joss Knight]

Hello Petter,

CUDA 8.0 was only released last week! mexcuda doesn't yet support it, and consequently does not yet support Visual Studio 2015, which is supported by CUDA 8.0 but not CUDA 7.5.

[Petter Stefansson]

Oh, I see.. I guess I will try to uninstall CUDA and reinstall an older legacy version and see if that helps then.

Thanks.

[Petter Stefansson]

I’ve now uninstalled CUDA 8.0 and installed CUDA 7.5.18, but still I get the “ No supported compiler or SDK was found ” error.. I’ve tried setting the C/C++ compiler to both Microsoft Visual C++ 2015 Professional and MinGW64 but the result is the same.

Any ideas on what I need to do in order to get it to compile? Try another compiler?

[Joss Knight]

If you want to know more about using mexcuda, and its limitations, check out the doc here: https://www.mathworks.com/help/distcomp/run-mex-functions-containing-cuda-code.html

[Petter Stefansson]

Thank you but I don’t think the main problem I’m facing is that I lack sufficient reading material on how to use mexcuda, the problem is that it fundamentally does not work at the moment since it refuses to accept all compilers I’ve tried and both CUDA toolbox 8 and 7.5 which as far as I can see the documentations does not give any advice on.

I have also tried explicitly telling Matlab the location of nvcc as suggested in the text you linked to:

setenv('MW_NVCC_PATH','C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v7.5\bin')

but sadly that changed nothing.

[Joss Knight]

Like I said, mexcuda does not support Visual Studio 2015 because CUDA 7.5 doesn't support it. You need to use VS 2012 or 2013. mexcuda can only support the host compilers that the CUDA compiler supports.

[Engenuity]

I am using VS2010 and having the same problem. I don't think an earlier version of VS is the correct fix.

[Walter Roberson]

CUDA 7.5 supported VS 2013, VS 2013 Community, VS 2012, and VS 2010

Answer 2

[Mendi Barel]

This is how to compile (mexcuda) with Visual Studio 2015 and Cuda 8.0 :

1. Go to: "\toolbox\distcomp\gpu\extern\src\mex\win64"
2. Copy files and rename 2013 to 2015: { "nvcc_msvcpp2013.xml" , "nvcc_msvcpp2013_dynamic.xml"}
3. Replace inside those files "7.5" to "8.0" and "12" to "14".
4. Done.

[Dang Manh Truong]

Actually when I tried your solution, an error came up: It says that the file ucrt.lib was missing. I searched the internet but could not find a solution, so I had no choice but to search for the file (in Program Files), then copy it to the Matlab's working directory. Only then did it work. But thanks anyway

[Soroush Mehravar]

Dang, is the name of file exactly ucrt.lib? I cannot find it in the program files.Thanks!