message: Make Python search versions user-settable
diff: @@ -109,7 +109,10 @@ if(ADIOS2_USE_Python)
  set(python_find_args REQUIRED)
  endif()
  if(SHARED_LIBS_SUPPORTED AND ADIOS2_ENABLE_PIC)
  - set(Python_ADDITIONAL_VERSIONS 3 2.7)
  + set(Python_ADDITIONAL_VERSIONS "3;2.7"
  + CACHE STRING "Python versions to search for"
  + )
  + mark_as_advanced(Python_ADDITIONAL_VERSIONS)
  list(APPEND python_find_args COMPONENTS Interp Libs numpy)
  if(ADIOS2_HAVE_MPI)
  list(APPEND python_find_args "mpi4py\\\;mpi4py/mpi4py.h")
  