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Or ignore them. Found by running the lint_urls.sh script locally with https://github.com/pytorch/pytorch/pull/153246 Pull Request resolved: https://github.com/pytorch/pytorch/pull/153277 Approved by: https://github.com/malfet
91 lines
3.6 KiB
CMake
91 lines
3.6 KiB
CMake
# Find the nccl libraries
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#
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# The following variables are optionally searched for defaults
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# NCCL_ROOT: Base directory where all NCCL components are found
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# NCCL_INCLUDE_DIR: Directory where NCCL header is found
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# NCCL_LIB_DIR: Directory where NCCL library is found
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#
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# The following are set after configuration is done:
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# NCCL_FOUND
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# NCCL_INCLUDE_DIRS
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# NCCL_LIBRARIES
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#
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# The path hints include CUDA_TOOLKIT_ROOT_DIR seeing as some folks
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# install NCCL in the same location as the CUDA toolkit.
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# See https://github.com/facebookarchive/caffe2/issues/1601
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set(NCCL_INCLUDE_DIR $ENV{NCCL_INCLUDE_DIR} CACHE PATH "Folder contains NVIDIA NCCL headers")
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set(NCCL_LIB_DIR $ENV{NCCL_LIB_DIR} CACHE PATH "Folder contains NVIDIA NCCL libraries")
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set(NCCL_VERSION $ENV{NCCL_VERSION} CACHE STRING "Version of NCCL to build with")
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if ($ENV{NCCL_ROOT_DIR})
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message(WARNING "NCCL_ROOT_DIR is deprecated. Please set NCCL_ROOT instead.")
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endif()
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list(APPEND NCCL_ROOT $ENV{NCCL_ROOT_DIR} ${CUDA_TOOLKIT_ROOT_DIR})
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# Compatible layer for CMake <3.12. NCCL_ROOT will be accounted in for searching paths and libraries for CMake >=3.12.
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list(APPEND CMAKE_PREFIX_PATH ${NCCL_ROOT})
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find_path(NCCL_INCLUDE_DIRS
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NAMES nccl.h
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HINTS ${NCCL_INCLUDE_DIR})
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if (USE_STATIC_NCCL)
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MESSAGE(STATUS "USE_STATIC_NCCL is set. Linking with static NCCL library.")
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SET(NCCL_LIBNAME "nccl_static")
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if (NCCL_VERSION) # Prefer the versioned library if a specific NCCL version is specified
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set(CMAKE_FIND_LIBRARY_SUFFIXES ".a.${NCCL_VERSION}" ${CMAKE_FIND_LIBRARY_SUFFIXES})
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endif()
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else()
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SET(NCCL_LIBNAME "nccl")
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if (NCCL_VERSION) # Prefer the versioned library if a specific NCCL version is specified
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set(CMAKE_FIND_LIBRARY_SUFFIXES ".so.${NCCL_VERSION}" ${CMAKE_FIND_LIBRARY_SUFFIXES})
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endif()
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endif()
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find_library(NCCL_LIBRARIES
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NAMES ${NCCL_LIBNAME}
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HINTS ${NCCL_LIB_DIR})
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(NCCL DEFAULT_MSG NCCL_INCLUDE_DIRS NCCL_LIBRARIES)
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if(NCCL_FOUND) # obtaining NCCL version and some sanity checks
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set (NCCL_HEADER_FILE "${NCCL_INCLUDE_DIRS}/nccl.h")
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message (STATUS "Determining NCCL version from ${NCCL_HEADER_FILE}...")
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set (OLD_CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
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list (APPEND CMAKE_REQUIRED_INCLUDES ${NCCL_INCLUDE_DIRS})
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include(CheckCXXSymbolExists)
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check_cxx_symbol_exists(NCCL_VERSION_CODE nccl.h NCCL_VERSION_DEFINED)
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if (NCCL_VERSION_DEFINED)
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set(file "${PROJECT_BINARY_DIR}/detect_nccl_version.cc")
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file(WRITE ${file} "
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#include <iostream>
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#include <nccl.h>
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int main()
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{
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std::cout << NCCL_MAJOR << '.' << NCCL_MINOR << '.' << NCCL_PATCH << std::endl;
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int x;
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ncclGetVersion(&x);
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return x == NCCL_VERSION_CODE;
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}
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")
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try_run(NCCL_VERSION_MATCHED compile_result ${PROJECT_BINARY_DIR} ${file}
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RUN_OUTPUT_VARIABLE NCCL_VERSION_FROM_HEADER
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CMAKE_FLAGS "-DINCLUDE_DIRECTORIES=${NCCL_INCLUDE_DIRS}"
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LINK_LIBRARIES ${NCCL_LIBRARIES})
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if (NOT NCCL_VERSION_MATCHED)
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message(FATAL_ERROR "Found NCCL header version and library version do not match! \
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(include: ${NCCL_INCLUDE_DIRS}, library: ${NCCL_LIBRARIES}) Please set NCCL_INCLUDE_DIR and NCCL_LIB_DIR manually.")
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endif()
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message(STATUS "NCCL version: ${NCCL_VERSION_FROM_HEADER}")
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else()
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message(STATUS "NCCL version < 2.3.5-5")
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endif ()
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set (CMAKE_REQUIRED_INCLUDES ${OLD_CMAKE_REQUIRED_INCLUDES})
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message(STATUS "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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