Next: Fortran standards status, Previous: Invoking GNU Fortran, Up: Top [Contents][Index]
3 Runtime: Influencing runtime behavior with environment variables
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 |
