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# Find the CUDNN libraries
#
# The following variables are optionally searched for defaults
# CUDNN_ROOT: Base directory where CUDNN is found
# CUDNN_INCLUDE_DIR: Directory where CUDNN header is searched for
# CUDNN_LIBRARY: Directory where CUDNN library is searched for
# CUDNN_STATIC: Are we looking for a static library? (default: no)
#
# The following are set after configuration is done:
# CUDNN_FOUND
# CUDNN_INCLUDE_PATH
# CUDNN_LIBRARY_PATH
#
include(FindPackageHandleStandardArgs)
set(CUDNN_ROOT $ENV{CUDNN_ROOT_DIR} CACHE PATH "Folder containing NVIDIA cuDNN")
if (DEFINED $ENV{CUDNN_ROOT_DIR})
message(WARNING "CUDNN_ROOT_DIR is deprecated. Please set CUDNN_ROOT instead.")
endif()
list(APPEND CUDNN_ROOT $ENV{CUDNN_ROOT_DIR} ${CUDA_TOOLKIT_ROOT_DIR})
# Compatible layer for CMake <3.12. CUDNN_ROOT will be accounted in for searching paths and libraries for CMake >=3.12.
list(APPEND CMAKE_PREFIX_PATH ${CUDNN_ROOT})
set(CUDNN_INCLUDE_DIR $ENV{CUDNN_INCLUDE_DIR} CACHE PATH "Folder containing NVIDIA cuDNN header files")
find_path(CUDNN_INCLUDE_PATH cudnn.h
HINTS ${CUDNN_INCLUDE_DIR}
PATH_SUFFIXES cuda/include cuda include)
option(CUDNN_STATIC "Look for static CUDNN" OFF)
if (CUDNN_STATIC)
set(CUDNN_LIBNAME "libcudnn_static.a")
else()
set(CUDNN_LIBNAME "cudnn")
endif()
set(CUDNN_LIBRARY $ENV{CUDNN_LIBRARY} CACHE PATH "Path to the cudnn library file (e.g., libcudnn.so)")
if (CUDNN_LIBRARY MATCHES ".*cudnn_static.a" AND NOT CUDNN_STATIC)
message(WARNING "CUDNN_LIBRARY points to a static library (${CUDNN_LIBRARY}) but CUDNN_STATIC is OFF.")
endif()
find_library(CUDNN_LIBRARY_PATH ${CUDNN_LIBNAME}
PATHS ${CUDNN_LIBRARY}
PATH_SUFFIXES lib lib64 cuda/lib cuda/lib64 lib/x64)
find_package_handle_standard_args(CUDNN DEFAULT_MSG CUDNN_LIBRARY_PATH CUDNN_INCLUDE_PATH)
if(CUDNN_FOUND)
# Get cuDNN version
if(EXISTS ${CUDNN_INCLUDE_PATH}/cudnn_version.h)
file(READ ${CUDNN_INCLUDE_PATH}/cudnn_version.h CUDNN_HEADER_CONTENTS)
else()
file(READ ${CUDNN_INCLUDE_PATH}/cudnn.h CUDNN_HEADER_CONTENTS)
endif()
string(REGEX MATCH "define CUDNN_MAJOR * +([0-9]+)"
CUDNN_VERSION_MAJOR "${CUDNN_HEADER_CONTENTS}")
string(REGEX REPLACE "define CUDNN_MAJOR * +([0-9]+)" "\\1"
CUDNN_VERSION_MAJOR "${CUDNN_VERSION_MAJOR}")
string(REGEX MATCH "define CUDNN_MINOR * +([0-9]+)"
CUDNN_VERSION_MINOR "${CUDNN_HEADER_CONTENTS}")
string(REGEX REPLACE "define CUDNN_MINOR * +([0-9]+)" "\\1"
CUDNN_VERSION_MINOR "${CUDNN_VERSION_MINOR}")
string(REGEX MATCH "define CUDNN_PATCHLEVEL * +([0-9]+)"
CUDNN_VERSION_PATCH "${CUDNN_HEADER_CONTENTS}")
string(REGEX REPLACE "define CUDNN_PATCHLEVEL * +([0-9]+)" "\\1"
CUDNN_VERSION_PATCH "${CUDNN_VERSION_PATCH}")
# Assemble cuDNN version
if(NOT CUDNN_VERSION_MAJOR)
set(CUDNN_VERSION "?")
else()
set(CUDNN_VERSION
"${CUDNN_VERSION_MAJOR}.${CUDNN_VERSION_MINOR}.${CUDNN_VERSION_PATCH}")
endif()
endif()
mark_as_advanced(CUDNN_ROOT CUDNN_INCLUDE_DIR CUDNN_LIBRARY CUDNN_VERSION)
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