Gentoo Archives: gentoo-user

From: Yohan Pereira <yohan.pereira@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Too terse error message from emerge.
Date: Mon, 14 Jan 2013 11:32:41
Message-Id: 20130114113434.GA28090@dethkomp
In Reply to: [gentoo-user] Too terse error message from emerge. by Alan Mackenzie
1 On 14/01/13 at 11:18am, Alan Mackenzie wrote:
2 > Hi, Gentoo.
3 >
4 > Would somebody please help me with this error message, which arose from
5 > # emerge -puND world
6 > :
7 >
8 > These are the packages that would be merged, in order:
9 >
10 > Calculating dependencies \
11 >
12 > !!! Problem resolving dependencies for media-gfx/sane-backends from @selected
13 > ... done!
14 >
15 > !!! The ebuild selected to satisfy "media-gfx/sane-backends" has unmet requirements.
16 > - 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"
17 >
18 > The following REQUIRED_USE flag constraints are unsatisfied: <=============================================
19 > sane_backends_mustek_usb2? ( threads ) sane_backends_kvs40xx? ( threads )
20 >
21 > (dependency required by "@selected" [set])
22 > (dependency required by "@world" [argument])
23 >
24 > ########################################################################
25 >
26 > I'm mystified as to what a "REQUIRED_USE flag constraint" is. What is
27 > the significance of "sane_backends_mustek_usb2"? It would appear not to
28 > be a use flag. What is the significance of "( threads )"?
29
30 Bassicly its emerge is telling you that if you have
31 sane_backends_mustek_usb2 enabled you also need to enable threads and
32 similarly if you have sane_backends_kvs40xx enabled you need to enable
33 threads. So in your case you need to enable threads or disable those 2
34 backends.
35
36 --
37
38 - Yohan Pereira
39
40 The difference between a Miracle and a Fact is exactly the difference
41 between a mermaid and a seal.
42 -- Mark Twain

Replies

Subject Author
Re: [gentoo-user] Too terse error message from emerge. Alan Mackenzie <acm@×××.de>