3.5. GFORTRAN_UNBUFFERED_ALL
3.5 GFORTRAN_UNBUFFERED_ALL—Do not buffer I/O on all units
This environment variable controls whether all I/O is unbuffered. If the first letter is ‘y
’, ‘Y
’ or ‘1
’, all I/O is unbuffered. This will slow down small sequential reads and writes. If the first letter is ‘n
’, ‘N
’ or ‘0
’, I/O is buffered. This is the default.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-6.3.0/gfortran/GFORTRAN_005fUNBUFFERED_005fALL.html