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Add linker script to support large cuda cubin files #3115

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Add linker script to support large cuda cubin files #3115

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16 changes: 16 additions & 0 deletions faiss/gpu/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -261,6 +261,22 @@ foreach(header ${FAISS_GPU_HEADERS})
)
endforeach()

# Prepares a host linker script and enables host linker to support
# very large device object files.
# This is what CUDA 11.5+ `nvcc -hls=gen-lcs -aug-hls` would generate
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/fatbin.ld"
[=[
SECTIONS
{
.nvFatBinSegment : { *(.nvFatBinSegment) }
__nv_relfatbin : { *(__nv_relfatbin) }
.nv_fatbin : { *(.nv_fatbin) }
}
]=]
)
target_link_options(faiss PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/fatbin.ld")
target_link_options(faiss_avx2 PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/fatbin.ld")

find_package(CUDAToolkit REQUIRED)
target_link_libraries(faiss PRIVATE CUDA::cudart CUDA::cublas $<$<BOOL:${FAISS_ENABLE_RAFT}>:raft::raft> $<$<BOOL:${FAISS_ENABLE_RAFT}>:raft::compiled> $<$<BOOL:${FAISS_ENABLE_RAFT}>:nvidia::cutlass::cutlass>)
target_link_libraries(faiss_avx2 PRIVATE CUDA::cudart CUDA::cublas $<$<BOOL:${FAISS_ENABLE_RAFT}>:raft::raft> $<$<BOOL:${FAISS_ENABLE_RAFT}>:raft::compiled> $<$<BOOL:${FAISS_ENABLE_RAFT}>:nvidia::cutlass::cutlass>)
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