On Thu, Sep 19, 2013 at 07:58:05PM +0530, Yohan Pereira wrote:

> > I would like to build sane-backend only for one specific scanner.
> > 
> > However, there are a huge lot of different USE flags for other scanners
> > that are already switched on by default.
> > 
> > Is there any easy way to switch them off?
> > […]
> > ...instead of directly switching off every one of them.
> 
> you can try 
> 
> media-gfx/sane-backends -* sane_backends_hp <other flags you need>

as eix tells you:

     SANE_BACKENDS="+abaton +agfafocus +apple ..."

It’s not just use flags, but an expanding variable. So if you put
SANE_BACKENDS="your device here" into make conf, only the specified
driver will be built. It’s the same principle that goes with VIDEO_CARDS
and LINGUAS, for example.
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