Since PR 30498 is fixed, gfortran supports backtraces. However, they are only displayed for library errors not for, e.g., SEGV or signalling IEEE signals.
A support for these can be found embedded in the patch at http://gcc.gnu.org/ml/gcc-patches/2007-02/msg00747.html -- Summary: Support backtracing for non-library errors Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: diagnostic Severity: enhancement 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=31189