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 )"?
Any other helpful comments appreciated.
--
Alan Mackenzie (Nuremberg, Germany).
