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The behavior of the gfortran can be influenced by
environment variables.
Malformed environment variables are silently ignored.
| • TMPDIR | Directory for scratch files | |
| • GFORTRAN_STDIN_UNIT | Unit number for standard input | |
| • GFORTRAN_STDOUT_UNIT | Unit number for standard output | |
| • GFORTRAN_STDERR_UNIT | Unit number for standard error | |
| • GFORTRAN_UNBUFFERED_ALL | Do not buffer I/O for all units | |
| • GFORTRAN_UNBUFFERED_PRECONNECTED | Do not buffer I/O for preconnected units. | |
| • GFORTRAN_SHOW_LOCUS | Show location for runtime errors | |
| • GFORTRAN_OPTIONAL_PLUS | Print leading + where permitted | |
| • GFORTRAN_LIST_SEPARATOR | Separator for list output | |
| • GFORTRAN_CONVERT_UNIT | Set endianness for unformatted I/O | |
| • GFORTRAN_ERROR_BACKTRACE | Show backtrace on run-time errors | |
| • GFORTRAN_FORMATTED_BUFFER_SIZE | Buffer size for formatted files | |
| • GFORTRAN_UNFORMATTED_BUFFER_SIZE | Buffer size for unformatted files |