On Mon, 28 Nov 2016 18:15:06 -0800, Ian Zimmerman wrote:

> > No, I believe it means that the _option_ to enable or disable qt4 has
> > been removed.  
> 
> Well - notice the 'R'.  So the package (or at least the version, see
> below) has not been changed since last time.

The version hasn't changed but the USE flags have, hence the rebuild.
Probably because you are using either --newuse or --changed-use.

> Is it possible for the ebuild to change (in particular, for USE flags to
> be removed) without a change in version number?

Yes, ebuilds can be, and are, changed without a revision bump under some
circumstances. Hence the presence of the above flags for emerge. I prefer
--changed-use since it is less intrusive, only rebuilding when the
changed USE flag actually makes a difference.


-- 
Neil Bothwick

Top Oxymorons Number 15: Extinct Life