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Fix empty CUDA_ARCHITECTURES when SM120 is the only arch #2804

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Fix empty CUDA_ARCHITECTURES when SM120 is the only arch #2804

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7 changes: 7 additions & 0 deletions transformer_engine/common/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,13 @@ if(NOT arch_120_index EQUAL -1)
endif()
endif()

# If all architectures were moved to specific lists, set a placeholder
# to avoid CMake's "CUDA_ARCHITECTURES is empty" error.
# The actual arch flags are added per-source via COMPILE_OPTIONS.
if(NOT CMAKE_CUDA_ARCHITECTURES)
set(CMAKE_CUDA_ARCHITECTURES OFF)
endif()

# cuDNN frontend API
set(CUDNN_FRONTEND_INCLUDE_DIR
"${CMAKE_CURRENT_SOURCE_DIR}/../../3rdparty/cudnn-frontend/include")
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