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set(NCCL_ROOT_DIR |
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$ENV{NCCL_ROOT_DIR} |
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CACHE PATH "Folder contains NVIDIA NCCL") |
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find_path( |
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NCCL_INCLUDE_DIRS |
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NAMES nccl.h |
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HINTS ${NCCL_INCLUDE_DIR} ${NCCL_ROOT_DIR} ${NCCL_ROOT_DIR}/include |
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${CUDA_TOOLKIT_ROOT_DIR}/include) |
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if($ENV{USE_STATIC_NCCL}) |
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message( |
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STATUS "USE_STATIC_NCCL detected. Linking against static NCCL library") |
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set(NCCL_LIBNAME "libnccl_static.a") |
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else() |
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set(NCCL_LIBNAME "nccl") |
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endif() |
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find_library( |
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NCCL_LIBRARIES |
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NAMES ${NCCL_LIBNAME} |
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HINTS ${NCCL_LIB_DIR} |
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${NCCL_ROOT_DIR} |
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${NCCL_ROOT_DIR}/lib |
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${NCCL_ROOT_DIR}/lib/x86_64-linux-gnu |
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${NCCL_ROOT_DIR}/lib64 |
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${CUDA_TOOLKIT_ROOT_DIR}/lib |
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${CUDA_TOOLKIT_ROOT_DIR}/lib64) |
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include(FindPackageHandleStandardArgs) |
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find_package_handle_standard_args(NCCL DEFAULT_MSG NCCL_INCLUDE_DIRS |
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NCCL_LIBRARIES) |
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if(NCCL_FOUND) |
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set(NCCL_HEADER_FILE "${NCCL_INCLUDE_DIRS}/nccl.h") |
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message( |
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STATUS "Determining NCCL version from the header file: ${NCCL_HEADER_FILE}") |
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file( |
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STRINGS ${NCCL_HEADER_FILE} NCCL_MAJOR_VERSION_DEFINED |
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REGEX "^[ \t]*#define[ \t]+NCCL_MAJOR[ \t]+[0-9]+.*$" |
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LIMIT_COUNT 1) |
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if(NCCL_MAJOR_VERSION_DEFINED) |
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string(REGEX REPLACE "^[ \t]*#define[ \t]+NCCL_MAJOR[ \t]+" "" |
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NCCL_MAJOR_VERSION ${NCCL_MAJOR_VERSION_DEFINED}) |
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message(STATUS "NCCL_MAJOR_VERSION: ${NCCL_MAJOR_VERSION}") |
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endif() |
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message( |
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STATUS |
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"Found NCCL (include: ${NCCL_INCLUDE_DIRS}, library: ${NCCL_LIBRARIES})") |
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mark_as_advanced(NCCL_ROOT_DIR NCCL_INCLUDE_DIRS NCCL_LIBRARIES) |
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endif() |
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