GNAT - filename/unitname question

[Manuel Collado <m.collado@lml.ls.fi.upm.es>]

Consider the following source file:

filename.adb
------------
   procedure unitname is
   begin
      ...
   end unitname;

Compiling it gives a warning:

   filename.adb:1:11: warning: file name does not match unit name, should
   be "unitname.adb"

And generates the files:

   filename.ali
   filename.o


The question is: is there a gcc switch or GNAT pragma to force the 
compiler to use the unitname for the object files? To have:

   unitname.ali
   unitname.o

instead of filename.* object files.

I've read the GNAT documentation for gcc switches and pragmas, but found 
nothing useful.

Thanks,
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