Fail to link promoted custom widget in .ui file.

[dukju ahn]

2007/7/8, Kris Wong <wongk at seapine.com>:
> > I can't understand why undefined reference error happens.
> > If util.so contains symbols of new widget, then linking util.so
> > is sufficient to use new widget right? Is this due to buildsystem
> > or qtdesigner?
>
> Just to check the one other obvious cause of this, you did export
> the widget class correct?

No, and that was the reason of link failure.
Thanks.