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55 lines
1.7 KiB
CMake
55 lines
1.7 KiB
CMake
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# FindNCCL.cmake This module finds the NVIDIA NCCL library and its include
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# directories.
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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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