Is there a "makedepend" equivalent that works with GNAT?

[Michael Bates <mbates@ionet.net>]

Using GNAT 3.11b on SGI IRIX 6.5:

Because I need to integrate Ada compilation into an existing system
of makefiles which we use to compile C and Fortran source, I need 
something like "makedepend" to generate dependency rules for Ada files
to match GNAT's compilation model.

Before someone says, "just use gnatmake", let me say that there are
things I need to be able to do with the source, object, and .ali files
that gnatmake doesn't know how to do.  For example, I need the makefile
to be smart enough to try to check a file it needs (e.g., an Ada spec,
or a subunit) out of RCS if it doesn't see it in the current directory.

So my question is:  Does anyone have a script or program to generate 
such dependency rules?

Thanks,
Mike Bates
FlightSafety Simulation
Broken Arrow, OK
mikeb@ssd.fsi.com