Workaround CUDA 12.9 / CMake 3.30: Ignore SM 10.0+

[ax3l]

Summary

The legacy CMake logic we have fails the moment that CUDA Toolkit advertises SMs >= 10.0. While we work on a modernization #4572, the current development breaks all CUDA builds in CUDA 12.9, even for older SMs.

Exclude newer SMs for now from our build logic.

Additional background

Seen with

$ cmake --version
cmake version 3.30.4

CMake suite maintained and supported by Kitware (kitware.com/cmake).

$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2025 NVIDIA Corporation
Built on Tue_May_27_02:21:03_PDT_2025
Cuda compilation tools, release 12.9, V12.9.86
Build cuda_12.9.r12.9/compiler.36037853_0

Checklist

The proposed changes:

• fix a bug or incorrect behavior in AMReX
• add new capabilities to AMReX
• changes answers in the test suite to more than roundoff level
• are likely to significantly affect the results of downstream AMReX users
• include documentation in the code and/or rst files, if appropriate

[ax3l]

Error messages where:

-- Found CUDAToolkit: /home/axel/micromamba/envs/warpx-gpu-mpich-dev/targets/x86_64-linux/include (found version "12.9.86")
CMake Error at build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:229 (math):
  math cannot parse the expression: "50-real/10": syntax error, unexpected
  exp_DIVIDE (8).
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:262 (convert_cuda_archs)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)


CMake Error at build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:230 (math):
  math cannot parse the expression: "50-real%10": syntax error, unexpected
  exp_MOD (8).
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:262 (convert_cuda_archs)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)

and

CMake Error at /home/axel/micromamba/envs/warpx-gpu-mpich-dev/share/cmake-3.30/Modules/FindCUDA/select_compute_arch.cmake:245 (message):
  Unknown CUDA Architecture Name 10.0 in CUDA_SELECT_NVCC_ARCH_FLAGS
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:274 (cuda_select_nvcc_arch_flags)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)


CMake Error at /home/axel/micromamba/envs/warpx-gpu-mpich-dev/share/cmake-3.30/Modules/FindCUDA/select_compute_arch.cmake:249 (message):
  arch_bin wasn't set for some reason
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:274 (cuda_select_nvcc_arch_flags)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)


CMake Error at /home/axel/micromamba/envs/warpx-gpu-mpich-dev/share/cmake-3.30/Modules/FindCUDA/select_compute_arch.cmake:245 (message):
  Unknown CUDA Architecture Name 10.1 in CUDA_SELECT_NVCC_ARCH_FLAGS
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:274 (cuda_select_nvcc_arch_flags)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)


CMake Error at /home/axel/micromamba/envs/warpx-gpu-mpich-dev/share/cmake-3.30/Modules/FindCUDA/select_compute_arch.cmake:249 (message):
  arch_bin wasn't set for some reason
Call Stack (most recent call first):
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXUtils.cmake:274 (cuda_select_nvcc_arch_flags)
  build/_deps/fetchedamrex-src/Tools/CMake/AMReXParallelBackends.cmake:113 (set_cuda_architectures)
  build/_deps/fetchedamrex-src/Src/CMakeLists.txt:40 (include)
...

[WeiqunZhang]

It seems to work for me without the change here. Maybe it's because I am using cmake 4.0.3.