gdb bug in Fortran langauge mode

[Dave Love]

If you want information about the output of other compilers in
specific cases I can probably provide it again at some stage, at least
for SunPro, MIPSpro (?), IBM XL, DEC of some vintages.

I hope gdb won't sacrifice g77 support for other compilers, but I'm
pretty sure work needs to be done on both g77 and gdb anyway.  g77
debugging is hardly winning at the moment :-(.