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

[Ben Abbott]

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