Questions: interfacing to C

["Julian Morrison" <julian@extropy.demon.co.uk>]

Two questons, I can't see how the ARM resolves them.

First, I have in C:

   typedef struct foo {int a} FOO;
   typedef struct bar {FOO *b} BAR;

To shim to this from Ada, should I do:

   with Interfaces.C; use Interfaces.C;
   type FOO is record
      a : int;
   end record;
   pragma Convention (C, FOO);

   type FOO_Access is acess all FOO;
   pragma Convention (C, FOO_Access);

   type BAR is record
      b : FOO_Access;
   end record;
   pragma Convention(C, BAR);

Or will it not convert the access type - and i'd have to use
System.Address?

Next question, similarly I have in C:

   FOO* get_foo(void);

Can I shim to it as:

   function get_foo () return FOO_Access;
   pragma Import (C, get_foo);

or is it returning a System.Address?