-fdump-ada-spec

[Simon Wright <simon@pushface.org>]

Does anyone know where this is implemented in the GCC sources?

I'm having trouble with some of the system headers: on Mac OS X, with
all the GNATs and GCCs I have, dumping /usr/include/wchar.h uses
'limited with' in a way that doesn't work, whereas on Debian (wheezy,
gcc-4.7) there's no 'limited with'. Of course, wchar.h is different!

I _think_ that -fdump-ada-spec sees that a particular type (eg FILE) is
always accessed via a pointer, and decides that 'limited with' is OK;
but for some reason this ends up being unacceptable.

The ARM (and AI95-0217) didn't help a lot here. I think the problem is
that the original code is like

   typedef struct Blah {
     int x;
   } FILE;

and the generated code is like

   package Stdio is

      type Blah is record
         X : Integer;
      end record;

      subtype FILE is Blah;

   end Stdio;

   limited with Stdio;
   package Wchar is

      procedure Foo (F : access Stdio.FILE);

   end Wchar;

and the 'limited with' magic only works for _types_, so you get the
error '"FILE" not declared in "Stdio"'.

Stdio.FILE should be declared as

      type FILE is new Blah;