gcc/fortran/doc/gfortran/runtime/gfortranunbufferedpreconnected.rst

   1 ..
   2   Copyright 1988-2022 Free Software Foundation, Inc.
   3   This is part of the GCC manual.
   4   For copying conditions, see the copyright.rst file.
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   6 .. _gfortran_unbuffered_preconnected:
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   8 GFORTRAN_UNBUFFERED_PRECONNECTED---Do not buffer I/O on preconnected units
   9 **************************************************************************
  10
  11 The environment variable named :envvar:`GFORTRAN_UNBUFFERED_PRECONNECTED` controls
  12 whether I/O on a preconnected unit (i.e. STDOUT or STDERR) is unbuffered.  If
  13 the first letter is :samp:`y`, :samp:`Y` or :samp:`1`, I/O is unbuffered.  This
  14 will slow down small sequential reads and writes.  If the first letter
  15 is :samp:`n`, :samp:`N` or :samp:`0`, I/O is buffered.  This is the default.