On 3 Apr 2013, at 17:34, Greg Ercolano wrote: > On 04/03/13 08:44, marty moore wrote: >> I notice that old examples used >> int i = (int)v; >> but that won't work with gcc-4.4.5 > > Right -- probably a "precision loss" error during the void* -> int, > since sizeof(void*)==8 and sizeof(int)==4. > > I think the best approach (in 1.3.x) is to use the new fl_intptr_t, e.g. > > int i = fl_intptr_t(v); > > Or, you could just use a long instead of an int, but that might cause > trouble on non-64bit builds.. which is I think what fl_intptr_t tries > to solve. (See the definition in FL/Fl_Widget.H)
Ah: right... Yes, I probably have -fpermissive set in my build environment anyway, so don't see this... I think something based around intptr_t (or fl_intptr_t) is the way to go, since on any host system, regardless of word size, that is "guaranteed" to provide an integral type that is large enough to hold a pointer... Probably intptr_t would work just about everywhere nowadays I'd guess, since C99 (and is it in C++11 too?) is pretty widely supported now. But the definition for fl_intptr_t should work *everywhere* so it is probably the most portable option. _______________________________________________ fltk mailing list fltk@easysw.com http://lists.easysw.com/mailman/listinfo/fltk
