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| # Copyright (c) 2019, NVIDIA CORPORATION. | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
| # | ||
|
|
||
| # Based on FindPNG.cmake from cmake 3.14.3 | ||
|
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| #[=======================================================================[.rst: | ||
| FindNCCL | ||
| -------- | ||
| Find libnccl, the NVIDIA Collective Communication Library. A hint to find NCCL | ||
| can be provided by setting NCCL_INSTALL_DIR. | ||
| Imported targets | ||
| ^^^^^^^^^^^^^^^^ | ||
| This module defines the following :prop_tgt:`IMPORTED` target: | ||
| ``NCCL::NCCL`` | ||
| The libnccl library, if found. | ||
| Result variables | ||
| ^^^^^^^^^^^^^^^^ | ||
| This module will set the following variables in your project: | ||
| ``NCCL_INCLUDE_DIRS`` | ||
| where to find nccl.h , etc. | ||
| ``NCCL_LIBRARIES`` | ||
| the libraries to link against to use NCCL. | ||
| ``NCCL_FOUND`` | ||
| If false, do not try to use NCCL. | ||
| ``NCCL_VERSION_STRING`` | ||
| the version of the NCCL library found | ||
| #]=======================================================================] | ||
|
|
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| find_path(NCCL_NCCL_INCLUDE_DIR nccl.h HINTS ${NCCL_INSTALL_DIR} PATH_SUFFIXES include) | ||
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| #TODO: Does this need to support finding the static library? | ||
|
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| list(APPEND NCCL_NAMES nccl libnccl) | ||
| set(_NCCL_VERSION_SUFFIXES 2) | ||
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| foreach(v IN LISTS _NCCL_VERSION_SUFFIXES) | ||
| list(APPEND NCCL_NAMES nccl${v} libnccl${v}) | ||
| endforeach() | ||
| unset(_NCCL_VERSION_SUFFIXES) | ||
| # For compatibility with versions prior to this multi-config search, honor | ||
| # any NCCL_LIBRARY that is already specified and skip the search. | ||
| if(NOT NCCL_LIBRARY) | ||
| find_library(NCCL_LIBRARY_RELEASE NAMES ${NCCL_NAMES} HINTS ${NCCL_INSTALL_DIR} PATH_SUFFIXES lib) | ||
| include(${CMAKE_ROOT}/Modules/SelectLibraryConfigurations.cmake) | ||
| select_library_configurations(NCCL) | ||
| mark_as_advanced(NCCL_LIBRARY_RELEASE) | ||
| endif() | ||
| unset(NCCL_NAMES) | ||
|
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| # Set by select_library_configurations(), but we want the one from | ||
| # find_package_handle_standard_args() below. | ||
| unset(NCCL_FOUND) | ||
|
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| if (NCCL_LIBRARY AND NCCL_NCCL_INCLUDE_DIR) | ||
| set(NCCL_INCLUDE_DIRS ${NCCL_NCCL_INCLUDE_DIR} ) | ||
| set(NCCL_LIBRARY ${NCCL_LIBRARY}) | ||
|
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| if(NOT TARGET NCCL::NCCL) | ||
| add_library(NCCL::NCCL UNKNOWN IMPORTED) | ||
| set_target_properties(NCCL::NCCL PROPERTIES | ||
| INTERFACE_INCLUDE_DIRECTORIES "${NCCL_INCLUDE_DIRS}") | ||
| if(EXISTS "${NCCL_LIBRARY}") | ||
| set_target_properties(NCCL::NCCL PROPERTIES | ||
| IMPORTED_LINK_INTERFACE_LANGUAGES "C" | ||
| IMPORTED_LOCATION "${NCCL_LIBRARY}") | ||
| endif() | ||
| endif() | ||
| endif () | ||
|
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| if (NCCL_NCCL_INCLUDE_DIR AND EXISTS "${NCCL_NCCL_INCLUDE_DIR}/nccl.h") | ||
| file(STRINGS "${NCCL_NCCL_INCLUDE_DIR}/nccl.h" nccl_major_version_str REGEX "^#define[ \t]+NCCL_MAJOR[ \t]+[0-9]+") | ||
| string(REGEX REPLACE "^#define[ \t]+NCCL_MAJOR[ \t]+([0-9]+)" "\\1" nccl_major_version_str "${nccl_major_version_str}") | ||
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| file(STRINGS "${NCCL_NCCL_INCLUDE_DIR}/nccl.h" nccl_minor_version_str REGEX "^#define[ \t]+NCCL_MINOR[ \t]+[0-9]+") | ||
| string(REGEX REPLACE "^#define[ \t]+NCCL_MINOR[ \t]+([0-9]+)" "\\1" nccl_minor_version_str "${nccl_minor_version_str}") | ||
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| file(STRINGS "${NCCL_NCCL_INCLUDE_DIR}/nccl.h" nccl_patch_version_str REGEX "^#define[ \t]+NCCL_PATCH[ \t]+[0-9]+") | ||
| string(REGEX REPLACE "^#define[ \t]+NCCL_PATCH[ \t]+([0-9]+)" "\\1" nccl_patch_version_str "${nccl_patch_version_str}") | ||
|
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| file(STRINGS "${NCCL_NCCL_INCLUDE_DIR}/nccl.h" nccl_suffix_version_str REGEX "^#define[ \t]+NCCL_SUFFIX[ \t]+\".*\"") | ||
| string(REGEX REPLACE "^#define[ \t]+NCCL_SUFFIX[ \t]+\"(.*)\"" "\\1" nccl_suffix_version_str "${nccl_suffix_version_str}") | ||
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| set(NCCL_VERSION_STRING "${nccl_major_version_str}.${nccl_minor_version_str}.${nccl_patch_version_str}${nccl_suffix_version_str}") | ||
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| unset(nccl_major_version_str) | ||
| unset(nccl_minor_version_str) | ||
| unset(nccl_patch_version_str) | ||
| unset(nccl_suffix_version_str) | ||
| endif () | ||
|
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| include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake) | ||
| find_package_handle_standard_args(NCCL | ||
| REQUIRED_VARS NCCL_LIBRARY NCCL_NCCL_INCLUDE_DIR | ||
| VERSION_VAR NCCL_VERSION_STRING) | ||
|
|
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| mark_as_advanced(NCCL_NCCL_INCLUDE_DIR NCCL_LIBRARY) |
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