Creating mixed language static libraries with gpr files?

[Markus Schoepflin <nospam@no.spam>]

Using gcc 4.3.3, I'm trying to create a static library that contains both 
object files created from Ada and C.

The gpr file to create the library (only using the Ada parts) looks like this:

---%<---
project foo is

   for source_dirs use ("src");
   for object_dir use "obj";

   for library_name use "foo";
   for library_dir use "./lib";
   for library_kind use "static";

end foo;
--->%---

Now I have a few object files built from C sources. Is it possibly to use 
the gnat project file to create the static library including those object 
files?

Markus