Make it possible to use vtknetcdf4 with external hdf5.

Change-Id: I807b319b438a08dcd6236c9e149a5941859e14ab

CMakeLists.txt

@@ -803,8 +803,11 @@ MARK_AS_ADVANCED(VTK_OPENGL_HAS_OSMESA
 #-----------------------------------------------------------------------------
 # Provide options to use system versions of third-party libraries.
 VTK_THIRD_PARTY_OPTION(ZLIB zlib)
+
+set(HDF5_FIND_COMPONENTS "HL;C")
 VTK_THIRD_PARTY_OPTION(HDF5 hdf5)
 INCLUDE(vtkHDF5Library)
+
 IF(VTK_USE_GL2PS)
 VTK_THIRD_PARTY_OPTION(GL2PS gl2ps)
 ENDIF(VTK_USE_GL2PS)

Utilities/vtknetcdf/CMakeLists.txt

@@ -229,11 +229,11 @@ mark_as_advanced(NETCDF_ENABLE_CXX)
 SET(CXX NETCDF_ENABLE_CXX)
 
 OPTION(NETCDF_ENABLE_NETCDF4 "Build netcdf version 4 API" ON)
-IF (NOT HDF5_BUILD_HL_LIB AND NETCDF_ENABLE_NETCDF4)
-  message("ENABLE_NETCDF4 not allowed because netcdf4 functionality requires HDF5_BUILD_HL_LIB.")
+if (NETCDF_ENABLE_NETCDF4 AND NOT (HDF5_BUILD_HL_LIB OR HDF5_hdf5_hl_LIBRARY))
+  message("ENABLE_NETCDF4 not allowed because NETCDF4 requires HDF5_HL.")
   SET(NETCDF_ENABLE_NETCDF4 OFF CACHE BOOL "Build netcdf version 4 API" FORCE)
-ENDIF (NOT HDF5_BUILD_HL_LIB AND NETCDF_ENABLE_NETCDF4)
-  mark_as_advanced(NETCDF_ENABLE_NETCDF4)
+endif (NETCDF_ENABLE_NETCDF4 AND NOT (HDF5_BUILD_HL_LIB OR HDF5_hdf5_hl_LIBRARY))
+mark_as_advanced(NETCDF_ENABLE_NETCDF4)
 SET(USE_NETCDF4 ${NETCDF_ENABLE_NETCDF4} CACHE INTERNAL "" FORCE)
 
 if (NETCDF_ENABLE_NETCDF4)
@@ -335,8 +335,13 @@ VTK_ADD_LIBRARY(vtkNetCDF
     ${netcdf_src4_SOURCES}
     ${netcdf_dispatch_SOURCES}
     ${netcdf_liblib_SOURCES})
+
 IF (NETCDF_ENABLE_NETCDF4)
+  if (VTK_USE_SYSTEM_HDF5)
+     TARGET_LINK_LIBRARIES(vtkNetCDF ${HDF5_hdf5_LIBRARY} ${HDF5_hdf5_hl_LIBRARY})
+  else()
      TARGET_LINK_LIBRARIES(vtkNetCDF ${VTK_HDF5_LIBRARIES})
+  endif()
 ENDIF (NETCDF_ENABLE_NETCDF4)
 
 VTK_ADD_LIBRARY(vtkNetCDF_cxx ${netcdf_cxx_SOURCES})