http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54572
--- Comment #2 from Janne Blomqvist <jb at gcc dot gnu.org> 2012-09-16 08:33:42 UTC --- (In reply to comment #1) > You need unwind frames present for this to work, i.e. the space (and to some > extent optimization-reducing - yes I'm sure) overhead of -funwind-tables. > (Only > x86_64 has this on, effectively.) How is this different from the current backtracing implementation in libgfortran? (That being said, we should probably modify the driver program to always add -funwind-tables, which IIRC isn't done today)