use gdb to do fortran code debugging

[Tian Siyuan]

Hi, 

I used g77 (version -- GNU Fortran 0.5.25 19991024 (release)) with -g
compiled some fortran code but I can not list the source code in gdb
(version 5.0). I can do it with gcc for c code.

Could any one how to solve this problem?

Thanks,

Tian