[mpiwg-tools] Questions on MPI_T_init_thread

[Junchao Zhang]

Hello,
  I have some questions on MPI_T_init_thread, which are unclear in the
Standard.
 1) Must MPI_T_init_thread() be called in programs before using MPI_T?
 2) Must MPI_T_init_thread() be only called by the main thread?
 3) Is it wrong to do
     MPI_T_init_thread(MPI_THREAD_SINGLE, &provided);
     MPI_Init_thread(LEVEL_HIGHER_THAN_SINGLE, &provided);

    or vice versa,

     MPI_Init_thread(MPI_THREAD_SINGLE, &provided);
     MPI_T_init_thread(LEVEL_HIGHER_THAN_SINGLE, &provided);

    Thanks.

--Junchao Zhang
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