Incorporate a recent change to netcdf_plugin_install_dir

Author: WardF

CMakeLists.txt

@@ -666,7 +666,11 @@ if((NOT DEFINED HDF5_PLUGIN_PATH) OR ("${HDF5_PLUGIN_PATH}" STREQUAL ""))
     string(REPLACE "\\" "/" AUP "$ENV{ALLUSERSPROFILE}")
     set(HDF5_PLUGIN_PATH "${AUP}/hdf5/lib/plugin")
   else()
-    set(HDF5_PLUGIN_PATH "/usr/local/hdf5/lib/plugin")
+    if(NOT DEFINED CMAKE_INSTALL_PREFIX)
+      set(HDF5_PLUGIN_PATH "/usr/local/hdf5/lib/plugin")
+    else()
+      set(HDF5_PLUGIN_PATH "${CMAKE_INSTALL_PREFIX}/hdf5/lib/plugin")
+    endif(NOT DEFINED CMAKE_INSTALL_PREFIX)
   endif()
   set(ENV{HDF5_PLUGIN_PATH} "${HDF5_PLUGIN_PATH}")
 endif()
@@ -696,7 +700,7 @@ if(NETCDF_ENABLE_PLUGIN_INSTALL)
       endif(DEFINED ENV{HDF5_PLUGIN_PATH})
       message(STATUS "Defaulting to -DPLUGIN_INSTALL_DIR=${NETCDF_PLUGIN_INSTALL_DIR}")
     endif()
-endif(ENABLE_PLUGIN_INSTALL)
+endif(NETCDF_ENABLE_PLUGIN_INSTALL)
 
 if(ENABLE_PLUGIN_INSTALL)
   # Use the lowest priority dir in the path