SunStudio is designed to handle mixed languages. Though I dont know the level of g77 debugging support.
You can try latest SunStudio Express on Linux, which does provide both C and Fortran compilers.
Just do not forget to link with Fortran compiler, to get fortran runtime properly linked.
And it surely will work with debugger.
regards,
__Fedor.
g77 is not officially supported by Sun Studio 11, it might or might
not work. We expect much better fortran debugging interoperability
in Sun Studio 12. The next Sun Studio Express release should have
full support for any fortran compiler that uses the dwarf debugging format.
We are already using dwarf for C and C++ now, and fortran is almost done.