Update FindCUDNN.cmake for cuDNN 9 (#640)

* update cudnn cmake for v9
Signed-off-by: Charlene Yang <8636796+cyanguwa@users.noreply.github.com>

* add back license information
Signed-off-by: Charlene Yang <8636796+cyanguwa@users.noreply.github.com>

---------
Signed-off-by: Charlene Yang <8636796+cyanguwa@users.noreply.github.com>

transformer_engine/cmake/FindCUDNN.cmake

@@ -8,25 +8,29 @@ find_path(
     CUDNN_INCLUDE_DIR cudnn.h
     HINTS $ENV{CUDNN_PATH} ${CUDNN_PATH} ${CUDAToolkit_INCLUDE_DIRS}
     PATH_SUFFIXES include
+    REQUIRED
 )
 
-function(find_cudnn_library NAME)
-    string(TOUPPER ${NAME} UPPERCASE_NAME)
+file(READ "${CUDNN_INCLUDE_DIR}/cudnn_version.h" cudnn_version_header)
+string(REGEX MATCH "#define CUDNN_MAJOR [1-9]+" macrodef "${cudnn_version_header}")
+string(REGEX MATCH "[1-9]+" CUDNN_MAJOR_VERSION "${macrodef}")
 
+function(find_cudnn_library NAME)
     find_library(
-        ${UPPERCASE_NAME}_LIBRARY ${NAME}
+        ${NAME}_LIBRARY ${NAME} "lib${NAME}.so.${CUDNN_MAJOR_VERSION}"
         HINTS $ENV{CUDNN_PATH} ${CUDNN_PATH} ${CUDAToolkit_LIBRARY_DIR}
         PATH_SUFFIXES lib64 lib/x64 lib
+        REQUIRED
     )
     
-    if(${UPPERCASE_NAME}_LIBRARY)
+    if(${NAME}_LIBRARY)
         add_library(CUDNN::${NAME} UNKNOWN IMPORTED)
         set_target_properties(
             CUDNN::${NAME} PROPERTIES
             INTERFACE_INCLUDE_DIRECTORIES ${CUDNN_INCLUDE_DIR}
-            IMPORTED_LOCATION ${${UPPERCASE_NAME}_LIBRARY}
+            IMPORTED_LOCATION ${${NAME}_LIBRARY}
         )
-        message(STATUS "${NAME} found at ${${UPPERCASE_NAME}_LIBRARY}.")
+        message(STATUS "${NAME} found at ${${NAME}_LIBRARY}.")
     else()
         message(STATUS "${NAME} not found.")
     endif()
@@ -35,22 +39,16 @@ function(find_cudnn_library NAME)
 endfunction()
 
 find_cudnn_library(cudnn)
-find_cudnn_library(cudnn_adv_infer)
-find_cudnn_library(cudnn_adv_train)
-find_cudnn_library(cudnn_cnn_infer)
-find_cudnn_library(cudnn_cnn_train)
-find_cudnn_library(cudnn_ops_infer)
-find_cudnn_library(cudnn_ops_train)
 
 include (FindPackageHandleStandardArgs)
 find_package_handle_standard_args(
-    CUDNN REQUIRED_VARS
-    CUDNN_INCLUDE_DIR CUDNN_LIBRARY
+    LIBRARY REQUIRED_VARS
+    CUDNN_INCLUDE_DIR cudnn_LIBRARY
 )
 
-if(CUDNN_INCLUDE_DIR AND CUDNN_LIBRARY)
+if(CUDNN_INCLUDE_DIR AND cudnn_LIBRARY)
 
-    message(STATUS "cuDNN: ${CUDNN_LIBRARY}")
+    message(STATUS "cuDNN: ${cudnn_LIBRARY}")
     message(STATUS "cuDNN: ${CUDNN_INCLUDE_DIR}")
     
     set(CUDNN_FOUND ON CACHE INTERNAL "cuDNN Library Found")
@@ -69,6 +67,20 @@ target_include_directories(
 )
 
 target_link_libraries(
+    CUDNN::cudnn_all
+    INTERFACE
+    CUDNN::cudnn 
+)
+
+if(CUDNN_MAJOR_VERSION EQUAL 8)
+    find_cudnn_library(cudnn_adv_infer)
+    find_cudnn_library(cudnn_adv_train)
+    find_cudnn_library(cudnn_cnn_infer)
+    find_cudnn_library(cudnn_cnn_train)
+    find_cudnn_library(cudnn_ops_infer)
+    find_cudnn_library(cudnn_ops_train)
+
+    target_link_libraries(
         CUDNN::cudnn_all
         INTERFACE
         CUDNN::cudnn_adv_train
@@ -77,5 +89,25 @@ target_link_libraries(
         CUDNN::cudnn_adv_infer
         CUDNN::cudnn_cnn_infer
         CUDNN::cudnn_ops_infer
-    CUDNN::cudnn
-)
+    )
+elseif(CUDNN_MAJOR_VERSION EQUAL 9)
+    find_cudnn_library(cudnn_cnn)
+    find_cudnn_library(cudnn_adv)
+    find_cudnn_library(cudnn_graph)
+    find_cudnn_library(cudnn_ops)
+    find_cudnn_library(cudnn_engines_runtime_compiled)
+    find_cudnn_library(cudnn_engines_precompiled)
+    find_cudnn_library(cudnn_heuristic)
+
+    target_link_libraries(
+        CUDNN::cudnn_all
+        INTERFACE
+        CUDNN::cudnn_adv
+        CUDNN::cudnn_ops
+        CUDNN::cudnn_cnn
+        CUDNN::cudnn_graph
+        CUDNN::cudnn_engines_runtime_compiled
+        CUDNN::cudnn_engines_precompiled
+        CUDNN::cudnn_heuristic
+    )
+endif()