message: only build dataspaces when MPI is found
diff: @@ -255,6 +255,7 @@ elseif(ADIOS2_USE_MHS)
  endif()
  # DataSpaces
  +if(MPI_FOUND)
  if(ADIOS2_USE_DataSpaces STREQUAL AUTO)
  find_package(DataSpaces 2.1.1)
  elseif(ADIOS2_USE_DataSpaces)
  @@ -263,6 +264,7 @@ endif()
  if(DATASPACES_FOUND)
  set(ADIOS2_HAVE_DataSpaces TRUE)
  endif()
  +endif()
  # HDF5
  if(ADIOS2_USE_HDF5 STREQUAL AUTO)
  