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[Caspar] Minor fix: Export CASPAR_MIN_ARCH and fix CUDA architecture list in Caspar template #463

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[Caspar] Minor fix: Export CASPAR_MIN_ARCH and fix CUDA architecture list in Caspar template #463

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4 changes: 3 additions & 1 deletion symforce/caspar/source/templates/buildfiles/CMakeLists.txt.jinja
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,11 @@ endif()

project(caspar_library LANGUAGES CXX CUDA)

set(CASPAR_MIN_ARCH 75 CACHE INTERNAL "Minimum CUDA arch required by Caspar")

# SASS for Turing/Ampere/Ada (sm_75–89) + PTX fallback for forward JIT-compatibility. sm_75 minimum required by cooperative_groups::reduce.
if(NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
set(CMAKE_CUDA_ARCHITECTURES 75 80 86 89 75-virtual)
set(CMAKE_CUDA_ARCHITECTURES ${CASPAR_MIN_ARCH} 80-real 86-real 89-real)
endif()

find_package(CUDAToolkit REQUIRED)
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