On 14/01/13 at 11:18am, Alan Mackenzie wrote:
> Hi, Gentoo.
>
> Would somebody please help me with this error message, which arose from
> # emerge -puND world
> :
>
> These are the packages that would be merged, in order:
>
> Calculating dependencies \
>
> !!! Problem resolving dependencies for media-gfx/sane-backends from @selected
> ... done!
>
> !!! The ebuild selected to satisfy "media-gfx/sane-backends" has unmet
> requirements.
> - media-gfx/sane-backends-1.0.23::gentoo USE="ipv6 (multilib) usb -avahi -doc
> -gphoto2 -threads -v4l -xinetd" SANE_BACKENDS="abaton agfafocus apple artec
> artec_eplus48u as6e avision bh canon canon630u canon_dr canon_pp cardscan
> coolscan coolscan2 coolscan3 dc210 dc240 dc25 dell1600n_net dmc epjitsu epson
> epson2 fujitsu genesys gt68xx hp hp3500 hp3900 hp4200 hp5400 hp5590 hpljm1005
> hpsj5s hs2p (ibm) kodak kodakaio kvs1025 kvs20xx kvs40xx leo lexmark ma1509
> magicolor matsushita microtek microtek2 mustek mustek_pp mustek_usb
> mustek_usb2 nec net niash p5 pie pixma plustek plustek_pp qcam ricoh rts8891
> s9036 sceptre sharp sm3600 sm3840 snapscan sp15c st400 stv680 tamarack teco1
> teco2 teco3 test u12 umax umax1220u umax_pp xerox_mfp -pnm"
>
> The following REQUIRED_USE flag constraints are unsatisfied:
> <=============================================
> sane_backends_mustek_usb2? ( threads ) sane_backends_kvs40xx? ( threads )
>
> (dependency required by "@selected" [set])
> (dependency required by "@world" [argument])
>
> ########################################################################
>
> I'm mystified as to what a "REQUIRED_USE flag constraint" is. What is
> the significance of "sane_backends_mustek_usb2"? It would appear not to
> be a use flag. What is the significance of "( threads )"?
Bassicly its emerge is telling you that if you have
sane_backends_mustek_usb2 enabled you also need to enable threads and
similarly if you have sane_backends_kvs40xx enabled you need to enable
threads. So in your case you need to enable threads or disable those 2
backends.
--
- Yohan Pereira
The difference between a Miracle and a Fact is exactly the difference
between a mermaid and a seal.
-- Mark Twain
