[cairo] Cairo 1.6 is imminent

[Hakki Dogusan]

Hi,

Kalle Vahlman wrote:
> 2008/4/10, Carl Worth <cworth at cworth.org>:
>> On Wed, 09 Apr 2008 15:34:02 -0700, Mathieu Lacage wrote:
>>  > Usually, making the function parameter un-named gets rid of the warning.
>>  > i.e.,
>>  >
>>  > void my_function (const char *)
>>  > {
>>  >   /* do stuff */
>>  > }
>>
>>
>> Oh, very nice. That's actually quite clean too. I'll do that (after
>>  1.6).
> 
> GCC also has a variable attribute "unused" (available at least since
> the 3-series) that does the trick, though not as cleanly of course.
> Seems like GCC 3.x doesn't allow unnamed parameters[1], so if that's a
> concern the attribute would be a better choice.
> 
> [1] With '-Wall -Wunused-parameter' for both 3.3 and 3.4 I get this:
> wtest.c: In function `foo':
> wtest.c:2: error: parameter name omitted
> 

wxWidgets uses following defines for undefined parameters:

from wx/include/wx/defs.h

/*  Macro to cut down on compiler warnings. */
#if 1 /*  there should be no more any compilers needing the "#else" 
version */
     #define WXUNUSED(identifier) /* identifier */
#else  /*  stupid, broken compiler */
     #define WXUNUSED(identifier) identifier
#endif

/*  some arguments are only used in debug mode, but unused in release one */
#ifdef __WXDEBUG__
     #define WXUNUSED_UNLESS_DEBUG(param)  param
#else
     #define WXUNUSED_UNLESS_DEBUG(param)  WXUNUSED(param)
#endif

...

It helps self documenting too.


--
Regards,
Hakki Dogusan