Port from Debian [Squeeze] to Ubuntu 12.10

[Peter M. Groen]

This question is asked many times on the different forums, but no answer 
found...

I'm switching from Debian (cups 1.4.4) to Ubuntu (cups 1.6.1) and suddenly 
my compiler is complaining about "forward declarations" in ipp.h and I'm a 
bit stuck at the moment.

-------------[Code]-------------
#include <cups/ipp.h>
....
ipp_t	*request = ippNew();

request->request.op.version[0] = 1;
request->request.op.version[1] = 1;
request->request.op.operation_id = IPP_GET_PRINTER_ATTRIBUTES;
request->request.op.request_id = rand();
-------------[/Code]-------------

This produces the following errors:

-------------[Compiler output]-------------
.../lib/printer/printerutil.cpp:xxx:x error: invalid use of incomplete type 
'ipp_t {aka struct _ipp_s}'
-------------[/Compiler output]-------------

There is no reason (as far as I can see) why this happens. Is the 
interface changed that much? Do i miss something?

-- 
Peter M. Groen