Create .ptx files from .cu files

Hi everyone,

I am completely knew to Cuda and wanted to practice with Matlab. Here is the code I wanted to run :

http://www.mathworks.ch/matlabcentral/fileexchange/44423-gpu-sparse--accumarray--non-uniform-grid

When downloaded the files, there were some .cu files. Therefore I read this :

http://www.mathworks.com/help/distcomp/run-cuda-or-ptx-code-on-gpu.html

It looks like .cu files have to be compiled to produce .ptx files that can then be run by Matlab. However, after hours and hours (and hours) of unsuccessful tries, I never made it. I installed Visual Studio 2012, then CUDA toolkit 6.0 and tried to run

nvcc -ptx "my file"

but I never passed the "cl.exe is not in PATH" error... And I tried many many things, like adding the path in ALL my environment variables...

So, it looks like it never manages to find cl.exe automatically, but I have found it (in different folder). Is there a way to manually add it when I type

nvcc -ptx "my file"

? Or maybe someone has a working step by step tutorial that works to compile the .cu files ?

Thanks for your help,

Alex

[Edric Ellis]

Have you tried launching a "Visual Studio Command Prompt" from the "Start" menu and then using NVCC from there?

Answer 1

[Herve Hugonnet]

I had the same issue and solved it by adding the path to the cl.exe filed in the comand line (change the path to match your visual studio installation) :

nvcc -ptx "test_kernel.cu" -ccbin "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.16.27023\bin\Hostx64\x64"

Also make sure you installed cuda