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nontlikeuname

Member

Registered: 2013-07-23

Posts: 21

[SOLVED] CUPS headers: dereferencing pointer to incomplete type

Hi,
I wasn't sure this was the right board or even the right forum, I'm sorry if it isn't.

Context:
I have got a Canon Pixma MX455 which I'm trying to setup with arch. The Cannon support site offers a deb, rpm or the source. After downloading the source and getting part way through making the apropriate things. I get an error message from gcc.

Error messages

The errors are always similar to one of these two variatons:

bjcups.c:702:11: error: dereferencing pointer to incomplete type
   pRequest->request.op.operation_id = CUPS_GET_PRINTERS;
           ^

bjcups.c:728:28: error: dereferencing pointer to incomplete type
       if (strcmp(pAttribute->name, "printer-name") == 0 && pAttribute->value_tag == IPP_TAG_NAME) {

bjcups.c

This is pretty much where I got stuck I have looked aroud a bit. I have a fairly basic understanding of C. From searching I have found that the error is probably because when pRequest and pAttribute are decrlared the ipp_t and ipp_attribute_t structures are no where in the file.

bjcups.c:

ipp_t                   *pRequest,                              // Pointer to CUPS IPP request.
                        *pResponse;                             // Pointer to CUPS IPP response.
ipp_attribute_t         *pAttribute;                            // Pointer to CUPS attributes.

The file /usr/include/cups/ipp.h does have the structures in (I think the code is correct).

ipp.h:

typedef struct _ipp_s ipp_t;		/**** IPP request/response data ****/
typedef struct _ipp_attribute_s ipp_attribute_t;

bjcups.c has:

#include <cups/cups.h>

cups.h has:

#  include "ipp.h"

So my question (of course) is: why am I getting errors?
Thank you very much for any help,
--nontlikeuname

Last edited by nontlikeuname (2014-12-30 19:46:05)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,722

Re: [SOLVED] CUPS headers: dereferencing pointer to incomplete type

I do not have your printer, but a casual look through the AUR coughed up:

aur/canon-pixma-mx450-complete 3.90-1 (0)
    Complete stand alone driver set (printing and scanning) for Canon Pixma
    MX450 series

Is that not the driver you need?

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nontlikeuname

Member

Registered: 2013-07-23

Posts: 21

Re: [SOLVED] CUPS headers: dereferencing pointer to incomplete type

Thank you that has worked.

Last edited by nontlikeuname (2014-01-20 18:28:35)