Make dependencies issue

[Ben Robinson]

Hello,

Where can I find a free program that will function like "gcc -MM -MG" but
for Fortran77/90?  I need to automatically build the list of file
dependencies for make so I don't need to recompile everything when I change
a header file.

I tried "g77 -M" and the compiler doesn't complain about an invalid switch
but no output is produced.

Thank you for your help,

Ben Robinson