GFORTRAN_ERROR_BACKTRACE—Show backtrace on run-time errors ¶If the GFORTRAN_ERROR_BACKTRACE variable is set to ‘y’,
‘Y’ or ‘1’ (only the first letter is relevant) then a
backtrace is printed when a serious run-time error occurs. To disable
the backtracing, set the variable to ‘n’, ‘N’, ‘0’.
Default is to print a backtrace unless the -fno-backtrace
compile option was used.