How to add an NVCC flag

Question

Aidan Fishenden 2024-7-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2135834-how-to-add-an-nvcc-flag

评论： Aidan Fishenden 2024-7-15

采纳的回答： Xiao Haonan

I am attempting to compile a program using CUDA, and am getting the following error in response

C:\Program Files\MATLAB\R2024a\sys\cuda\win64\cuda\include\crt/host_config.h(164): fatal error C1189:

#error: -- unsupported Microsoft Visual Studio version! Only the versions between 2017 and 2022

(inclusive) are supported! The nvcc flag '-allow-unsupported-compiler' can be used to override this

version check; however, using an unsupported host compiler may cause compilation failure or incorrect run

time execution. Use at your own risk.

I looked and it seems the problem is caused by a small glitch in a recent update of visual studio that shouldnt have any effect on the compiler. How do I add the flag to override the version check? My current code is as follows

mex -setup:'C:\Program Files\MATLAB\R2024a\bin\win64\mexopts\msvcpp2022.xml' C++

mexGPUall

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Answer 1

Xiao Haonan 2024-7-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2135834-how-to-add-an-nvcc-flag#answer_1484998

在 MATLAB Online 中打开

Hi Aiden,

I encountered the same problem, and solved it by setting environmental variable "NVCC_APPEND_FLAGS".

To do this, you can try:

setenv("NVCC_APPEND_FLAGS", '-allow-unsupported-compiler')
mexcuda -v mexGPUExample.cu

Hope it helps!

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Aidan Fishenden 2024-7-15

This worked perfectly, thank you!

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Answer 2

Akash 2024-7-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2135834-how-to-add-an-nvcc-flag#answer_1483703

Hi Aidan,

To address the issue, you can ensure that the compiler and its version are supported with the product. You can find the list of supported and compatible compilers at the following link:-

https://www.mathworks.com/support/requirements/supported-compilers.html

The tables on this page outline the compilers that are supported by various MathWorks products.

For configuring parameters for CUDA code generation, you can use "coder.gpuConfig". This allows setting additional flags for the GPU compiler, including the NVCC flag. You can find more information on how to set these properties in the below provided MATLAB documentation link:-

https://www.mathworks.com/help/gpucoder/ref/coder.gpucodeconfig.html?searchHighlight=nvcc%20flag&s_tid=srchtitle_support_results_2_nvcc%20flag#:~:text=default)%20%7C%20character%20vector-,CompilerFlags,-%E2%80%94%20Additional%20flags

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Aidan Fishenden 2024-7-10

编辑：Walter Roberson 2024-7-10

在 MATLAB Online 中打开

Would it be possible for you to show example code? I've gone through the page you reccomended but am still getting the same error despite the changes. It still does not recognize the flag.

mex -setup:'C:\Program Files\MATLAB\R2024a\bin\win64\mexopts\msvcpp2022.xml' C++ 
cfg = coder.gpuConfig( "mex" );
cfg.TargetLang = "C++";
cfg.GpuConfig.CompilerFlags = "--allow-unsupported-compiler";
cfg.GpuConfig.SelectCudaDevice = 0;
mexGPUall