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# template taken from https://cmake.org/cmake/help/v3.14/manual/cmake-developer.7.html
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindCUDNN
---------
Finds the cuDNN library.
Requires:
^^^^^^^^^
find_cuda_helper_libs from FindCUDA.cmake
i.e. CUDA module should be found using FindCUDA.cmake before attempting to find cuDNN
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``CUDNN_FOUND``
``CUDNN_INCLUDE_DIRS`` location of cudnn.h
``CUDNN_LIBRARIES`` location of cudnn library
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables will be set if cuDNN was found. They may also be set on failure.
``CUDNN_LIBRARY``
``CUDNN_INCLUDE_DIR``
``CUDNN_VERSION``
``CUDNN_VERSION_MAJOR`` INTERNAL
``CUDNN_VERSION_MINOR`` INTERNAL
``CUDNN_VERSION_PATCH`` INTERNAL
#]=======================================================================]
# find the library
if(CUDA_FOUND)
find_cuda_helper_libs(cudnn)
set(CUDNN_LIBRARY ${CUDA_cudnn_LIBRARY} CACHE FILEPATH "location of the cuDNN library")
unset(CUDA_cudnn_LIBRARY CACHE)
endif()
# find the include
if(CUDNN_LIBRARY)
find_path(CUDNN_INCLUDE_DIR
cudnn.h
PATHS ${CUDA_TOOLKIT_INCLUDE}
DOC "location of cudnn.h"
NO_DEFAULT_PATH
)
if(NOT CUDNN_INCLUDE_DIR)
find_path(CUDNN_INCLUDE_DIR
cudnn.h
DOC "location of cudnn.h"
)
endif()
endif()
# extract version from the include
if(CUDNN_INCLUDE_DIR)
if(EXISTS "${CUDNN_INCLUDE_DIR}/cudnn_version.h")
file(READ "${CUDNN_INCLUDE_DIR}/cudnn_version.h" CUDNN_H_CONTENTS)
else()
file(READ "${CUDNN_INCLUDE_DIR}/cudnn.h" CUDNN_H_CONTENTS)
endif()
string(REGEX MATCH "define CUDNN_MAJOR ([0-9]+)" _ "${CUDNN_H_CONTENTS}")
set(CUDNN_VERSION_MAJOR ${CMAKE_MATCH_1} CACHE INTERNAL "")
string(REGEX MATCH "define CUDNN_MINOR ([0-9]+)" _ "${CUDNN_H_CONTENTS}")
set(CUDNN_VERSION_MINOR ${CMAKE_MATCH_1} CACHE INTERNAL "")
string(REGEX MATCH "define CUDNN_PATCHLEVEL ([0-9]+)" _ "${CUDNN_H_CONTENTS}")
set(CUDNN_VERSION_PATCH ${CMAKE_MATCH_1} CACHE INTERNAL "")
set(CUDNN_VERSION "${CUDNN_VERSION_MAJOR}.${CUDNN_VERSION_MINOR}.${CUDNN_VERSION_PATCH}")
unset(CUDNN_H_CONTENTS)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(CUDNN
FOUND_VAR CUDNN_FOUND
REQUIRED_VARS
CUDNN_LIBRARY
CUDNN_INCLUDE_DIR
VERSION_VAR CUDNN_VERSION
)
if(CUDNN_FOUND)
set(CUDNN_LIBRARIES ${CUDNN_LIBRARY})
set(CUDNN_INCLUDE_DIRS ${CUDNN_INCLUDE_DIR})
endif()
mark_as_advanced(
CUDNN_LIBRARY
CUDNN_INCLUDE_DIR
CUDNN_VERSION
)
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