From: Alan McKinnon <alan.mckinnon@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] triggered by backtracking - what does that mean?
Date: Fri, 25 Jul 2014 11:12:26 +0200 [thread overview]
Message-ID: <53D21F7A.2090906@gmail.com> (raw)
In-Reply-To: <1406202420.21481.0@numa-i>
On 24/07/2014 13:47, Helmut Jarausch wrote:
> Hi,
> would anybody please explain what the following means:
>
> emerge -vp net-libs/libpcap
> Calculating dependencies * waiting for lock on
> /var/db/.pkg.portage_lockfile ... [ ok ]
> ... done!
> [ebuild R ] net-libs/libpcap-1.5.3 USE="bluetooth dbus ipv6
> -canusb -netlink -static-libs" 0 KiB
>
> Total: 1 package (1 reinstall), Size of downloads: 0 KiB
>
> !!! The following update(s) have been skipped due to unsatisfied
> dependencies
> !!! triggered by backtracking:
>
> net-libs/libpcap:0
It means you got tripped up by portage's New! Improved! Awesome!
internal invisible magic. Subslots started it all and portage has to
wade through tons of cruft to figure out the entire dependency tree. In
a nutshell, it keeps searching deeper and deeper until it finds an
answer that works, or until it hits a threshold. When it hits that
threshold, portage exits and says it went as far as it should and has
now given up.
A solution is to have portage search deeper:
emerge --backtrack=30
The default is 10 (usually plenty) but sometimes you need more.
--
Alan McKinnon
alan.mckinnon@gmail.com
next prev parent reply other threads:[~2014-07-25 9:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-24 11:47 [gentoo-user] triggered by backtracking - what does that mean? Helmut Jarausch
2014-07-25 9:12 ` Alan McKinnon [this message]
2014-07-25 9:54 ` Neil Bothwick
2014-07-25 10:19 ` Alan McKinnon
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