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Re: Buffered/unbuffered I/O issues

Tobias,

> I still wonder whether FX is not right in saying that
> GFORTRAN_UNBUFFERED_ALL is enough; for fine-grained unbuffering one can
> use the widely supported vendor extension, the FLUSH([unit]) subroutine,
> or Fortran 2003's FLUSH(unit) statement.

is the FLUSH statement supposed to work on stdout?
IBM's xlf 9.1 stops the execution on encountering a FLUSH(6):

1525-201 The FLUSH statement refers to unit 6 which is connected to a non-seekable device.  The FLUSH statement cannot be applied to non-seekable files.  The program will stop.

(Funnily, the IBM extension flush_, a subroutine, works for stdout).

Reading IBM's documentation and comparing to the F2003 draft standard,
it appears that this behavior is allows, although I find it strange.
IMHO flushing buffers has nothing to do with performing a seek.

Cheers,
-ha

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