Re: uimenu implementation, 2nd version [build failure on MacOS X]

[Ben Abbott]

On Oct 26, 2010, at 3:20 PM, Kai Habel wrote:

> -------- Original-Nachricht --------
>> Datum: Tue, 26 Oct 2010 12:32:33 +0800
>> Von: Ben Abbott <address@hidden>
>> An: Ben Abbott <address@hidden>
>> CC: Kai Habel <address@hidden>, "John W. Eaton" <address@hidden>, GNU Octave 
>> <address@hidden>
>> Betreff: Re: uimenu implementation, 2nd version [build failure on MacOS X]
> 
>> On Oct 26, 2010, at 11:15 AM, Ben Abbott wrote:
>> 
>>> On Oct 26, 2010, at 1:03 AM, Kai Habel wrote:
>>> 
>>>> Ok, I have pushed an updated Changeset, with the uimenu implementation
>> for the fltk backend.
>>>> 
>>>> Kai
>>> 
>>> With this change, my buiid is failing
>>> 
>> 
>> /* snip */
>> 
>>> DLD-FUNCTIONS/fltk_backend.cc: In member function 'Matrix
>> fltk_uimenu::find_uimenu_children(T&) const':
>>> DLD-FUNCTIONS/fltk_backend.cc:339: error: request for member
>> 'get_position' in
>> 'dynamic_cast<uimenu::properties&>(kidgo.graphics_object::get_properties())',
>>  which is of non-class type 'uimenu::properties&'
>>> DLD-FUNCTIONS/fltk_backend.cc:341: error: request for member
>> 'get_fltk_label' in
>> 'dynamic_cast<uimenu::properties&>(kidgo.graphics_object::get_properties())',
>>  which is of non-class type 'uimenu::properties&'
>>> DLD-FUNCTIONS/fltk_backend.cc: In member function 'Matrix
>> fltk_uimenu::find_uimenu_children(T&) const [with T = uimenu::properties]':
>>> DLD-FUNCTIONS/fltk_backend.cc:360:   instantiated from here
>>> DLD-FUNCTIONS/fltk_backend.cc:340: warning: unused variable 'lbl'
>>> DLD-FUNCTIONS/fltk_backend.cc: In member function 'Matrix
>> fltk_uimenu::find_uimenu_children(T&) const [with T = figure::properties]':
>>> DLD-FUNCTIONS/fltk_backend.cc:554:   instantiated from here
>>> DLD-FUNCTIONS/fltk_backend.cc:340: warning: unused variable 'lbl'
>>> make[3]: ***
>> [DLD-FUNCTIONS/DLD_FUNCTIONS_fltk_backend_la-fltk_backend.lo] Error 1
>>> make[2]: *** [check] Error 2
>>> make[1]: *** [check-recursive] Error 1
>>> make: *** [check] Error 2
>>> 
>>> Ben
>> 
>> The lines of fltk_backend.cc which produce the error are 
>> 
>> 335             if (kidgo.isa ("uimenu"))
>> 336               {
>> 337                 uimenu_childs(k) = uimenu_childs(ii);
>> 338                 pos(k++) =
>> 339                   dynamic_cast<uimenu::properties&>
>> (kidgo.get_properties ()).get_position ();
>> 340                 std::string lbl =
>> 341                   dynamic_cast<uimenu::properties&>
>> (kidgo.get_properties ()).get_fltk_label ();
>> 342               }
>> 
>> Perhaps this is related to this is a bug in the version of gcc I'm
>> running?
>> 
>>      http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34364
>> 
>> $ gcc --version
>> i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
>> Copyright (C) 2007 Free Software Foundation, Inc.
>> This is free software; see the source for copying conditions.  There is NO
>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
>> PURPOSE.
>> 
>> To allow the build to continue, I commented out this if-block, and didn't
>> encounter any more errors (and as expected the uimenu doesn't function).
>> 
>> Ben
> 
> Hello Ben,
> 
> yes it seems you have triggered the bug described in the link. I will try to 
> find a workoround without changing my internal interfaces later today.
> 
> Kai
> 
> P.S. Is there a more recent gcc suite available from Apple/for MacOS for you 
> to test with? 

Unfortunately, I've not been successful mixing versions of gcc since libtool 
was added. Thus, to build with a different version of gcc, I'd have to rebuild 
all the dependencies. Which is a task I've not attempted before.

Ben