Enabled CUDA 12 C++20 w/ CMake, but .cu files cannot import ixx modules

Question

Thanks to this answer, CUDA 12 C++20 support with CMake not working, I have .cu files building with C++20 using CMake and Visual Studio 2022.

However, when I import a C++ module in a .cu file, it gives an error: "catastrophic error : could not find module file for module"

Are C++20 modules supported in CUDA 12? I cannot find examples anywhere.

It is also possible that I need to modify the CMake configuration, but I'm not sure what needs to be done.

score 3 · Accepted Answer · answered Jan 11 '23 at 23:25

3

Quoting the CUDA 12.0 documentation:

Modules are not supported in CUDA C++, in either host or device code. Uses of the module, export and import keywords are diagnosed as errors.

answered Jan 11 '23 at 23:25

talonmies

Thank you for finding what I could not! – Dale Barnard Jan 12 '23 at 14:31
@DaleBarnard: It wouldn't kill NVIDIA to provide a decent error message though. :-( – einpoklum Jan 12 '23 at 22:26

1 Answers1