Added support for CUDA_PATH which is present in the CUDA toolkit 3.2 onward.

This required changing how the paths were used.  I now use the PATH_SUFFIXES parameter
instead of putting the whole path in the command.

Modules/FindCUDA.cmake

@@ -443,7 +443,10 @@ if(NOT CUDA_TOOLKIT_ROOT_DIR)
   # Search in the CUDA_BIN_PATH first.
   find_path(CUDA_TOOLKIT_ROOT_DIR
     NAMES nvcc nvcc.exe
-    PATHS ENV CUDA_BIN_PATH
+    PATHS
+      ENV CUDA_PATH
+      ENV CUDA_BIN_PATH
+    PATH_SUFFIXES bin bin64
     DOC "Toolkit location."
     NO_DEFAULT_PATH
     )
@@ -472,9 +475,10 @@ endif (NOT CUDA_TOOLKIT_ROOT_DIR)
 # CUDA_NVCC_EXECUTABLE
 find_program(CUDA_NVCC_EXECUTABLE
   NAMES nvcc
-  PATHS "${CUDA_TOOLKIT_ROOT_DIR}/bin"
-        "${CUDA_TOOLKIT_ROOT_DIR}/bin64"
+  PATHS "${CUDA_TOOLKIT_ROOT_DIR}"
+  ENV CUDA_PATH
   ENV CUDA_BIN_PATH
+  PATH_SUFFIXES bin bin64
   NO_DEFAULT_PATH
   )
 # Search default search paths, after we search our own set of paths.
@@ -500,8 +504,10 @@ set(CUDA_VERSION_STRING "${CUDA_VERSION}")
 # CUDA_TOOLKIT_INCLUDE
 find_path(CUDA_TOOLKIT_INCLUDE
   device_functions.h # Header included in toolkit
-  PATHS "${CUDA_TOOLKIT_ROOT_DIR}/include"
+  PATHS "${CUDA_TOOLKIT_ROOT_DIR}"
+  ENV CUDA_PATH
   ENV CUDA_INC_PATH
+  PATH_SUFFIXES include
   NO_DEFAULT_PATH
   )
 # Search default search paths, after we search our own set of paths.
@@ -516,19 +522,16 @@ macro(FIND_LIBRARY_LOCAL_FIRST _var _names _doc)
   if(CMAKE_SIZEOF_VOID_P EQUAL 8)
     # CUDA 3.2+ on Windows moved the library directoryies, so we need the new
     # and old paths.
-    set(_cuda_64bit_lib_dir
-      "${CUDA_TOOLKIT_ROOT_DIR}/lib/x64"
-      "${CUDA_TOOLKIT_ROOT_DIR}/lib64"
-      )
+    set(_cuda_64bit_lib_dir "lib/x64" "lib64" )
   endif()
   # CUDA 3.2+ on Windows moved the library directories, so we need to new
   # (lib/Win32) and the old path (lib).
   find_library(${_var}
     NAMES ${_names}
-    PATHS ${_cuda_64bit_lib_dir}
-          "${CUDA_TOOLKIT_ROOT_DIR}/lib/Win32"
-          "${CUDA_TOOLKIT_ROOT_DIR}/lib"
+    PATHS "${CUDA_TOOLKIT_ROOT_DIR}"
+    ENV CUDA_PATH
     ENV CUDA_LIB_PATH
+    PATH_SUFFIXES ${_cuda_64bit_lib_dir} "lib/Win32" "lib"
     DOC ${_doc}
     NO_DEFAULT_PATH
     )