As found by Harald Anlauf, http://gcc.gnu.org/ml/fortran/2007-10/msg00239.html
,
the GFORTRAN_UNBUFFERED_<number> environment variables are not effective, only
GFORTRAN_UNBUFFERED_ALL affects the buffering.
Francois-Xavier replied:
Currently, GFORTRAN_UNBUFFERED_ALL is implemented but
GFORTRAN_UNBUFFERED_n (where n is not ALL) isn't. This should either
be implemented, or the documentation for that feature should be
removed (as well as the unused code providing partial support for
it). I think the second choice is simplest, because 1. people who want
unbuffered output can use GFORTRAN_UNBUFFERED_ALL, and 2. if they
really need partial unbuffered output, they can use FLUSH.
--
Summary: Environment variable GFORTRAN_UNBUFFERED_<number> not
working
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Keywords: documentation
Severity: normal
Priority: P3
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: burnus at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33795
