MatX 1.0.0 is not compatible with cuda-toolkit 12.x

[perseoGI]

Greetings from @conan-io team.
We are trying to add your libraryr to Conan Center Index but in the meantime, we found that this library is no longer compatible with Cuda Toolkit 12.x.

This PR #1085 added some includes to <cuda/std/numbers>.

As described in NVIDIA docs, <cuda/std/numbers> was introduced in Cuda Toolkit 13.x.

The documentation (README.md and release notes) could be updated in order to reflect the incompatability with Cuda Toolkit 12.x.
Or maybe, a fallback could be added (maybe using `std::numbers from C++ standard library IDK).

Using rapids_cpm_cccl may be hidding this incompatibilty as, if installing this library with CMake, CMake will request the latest CCCL library (compatible).

Thank you in advance! 🐸

[cliffburdick]

Hi @perseoGI, cuda/std/numbers is part of the CCCL library: https://github.com/NVIDIA/cccl. In general, MatX cannot use the CCCL included with the CUDA toolkit since it's too old. You can see in our build requirements here that we require CCCL 3.3.0. If you use MatX as a CMake package it will pull that in via CPM, but if using Conan it probably doesn't do that.

[perseoGI]

Yes, I understand.
In Conan Center we may not depend on CPM in order to pull third party dependencies. That is why, if users are directly depending on their system installed cuda-toolkit, they may need cuda-toolkit 13.x in order to use matx.
It is just that, thank you for your clarification!