Bug#568881: gnat-4.4: Type to stream input/output broken on big endian archs

[xavier <xavier.grave@ipno.in2p3.fr>]

Package: gnat-4.4
Version: 4.4.3-1
Severity: normal

The output of write_stream is different regarding the architecture it is
executed :
powerpc (big endian):
hexdump -C ./output_stream.dat 
00000000  fa da da da de ad be ef
amd64 (little endian):
00000000  ef be ad de da da da fa
i386 (little endian):
00000000  ef be ad de da da da fa
mips (big endian):
00000000  fa da da da de ad be ef
sparc (big endian):
00000000  fa da da da de ad be ef

As far as I understood streams, the output should be neutral regarding of the
architecture.

*** write_stream.adb
with Ada.Streams.Stream_IO;
with Interfaces;

procedure Write_Stream is
   File : Ada.Streams.Stream_IO.File_Type;
   Item_To_Write : constant Interfaces.Unsigned_64 := 16#Fada_D_Ada_Dead_Beef#;
   Stream : Ada.Streams.Stream_IO.Stream_Access;
begin
   Ada.Streams.Stream_IO.Create (File,
                                 Name => "output_stream.dat");
   Stream := Ada.Streams.Stream_IO.Stream (File);
   Interfaces.Unsigned_64'Output (Stream, Item_To_Write);
   Ada.Streams.Stream_IO.Close (File);
end Write_Stream;


-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: powerpc (ppc64)

Kernel: Linux 2.6.30-2-powerpc64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnat-4.4 depends on:
ii  gcc-4.4                   4.4.3-2        The GNU C compiler
ii  gnat-4.4-base             4.4.3-1        The GNU Compiler Collection (gnat 
ii  libc6                     2.10.2-5       Embedded GNU C Library: Shared lib
ii  libc6-dev                 2.10.2-5       Embedded GNU C Library: Developmen
ii  libgcc1                   1:4.4.3-2      GCC support library
ii  libgmp3c2                 2:4.3.2+dfsg-1 Multiprecision arithmetic library
ii  libgnat-4.4               4.4.3-1        Runtime library for GNU Ada applic
ii  libgnatprj4.4             4.4.3-1        GNU Ada Project Manager
ii  libgnatvsn4.4             4.4.3-1        GNU Ada compiler version library
ii  libmpfr1ldbl              2.4.2-3        multiple precision floating-point 

gnat-4.4 recommends no packages.

Versions of packages gnat-4.4 suggests:
pn  ada-reference-manual          <none>     (no description available)
pn  gnat-4.4-doc                  <none>     (no description available)

-- no debconf information