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<H3 align="left"><img src="../../gx/dennis/qbubble.gif"
height="50" width="60" alt="(?) " border="0"
>Dependency Hell</H3>
<p><strong>From Andrew
</strong></p>
<p></strong></p>
<p align="right"><strong>Answered By Thomas Adams, Dan Wilder, Heather Stern
</strong></p>
<P><STRONG>
<IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
Hello Gang,
</STRONG></P>
<P><STRONG>
Hope you don't minding me milking some knowledge from
you. One thing that has been bugging me for a while now is this.
</STRONG></P>
<P><STRONG>
I am running Redhat 6.1 with a recompiled kernel (2.2.19)..
</STRONG></P>
<P><STRONG>
This is the thing though. There are given programs that i may/do want to
install that need different libraries for them to work. Most of my upgrades
have been via rpm -U scenario (easy to keep track of what is on my system).
</STRONG></P>
<P><STRONG>
I need to install gcc which when i do the following i get this
</STRONG></P>
<pre><strong>[root@echelon /root]# rpm -ivh gcc-2.96-54.i386.rpm
error: failed dependencies:
cpp =3D 2.96 is needed by gcc-2.96-54
</strong></pre>
<P><STRONG>
so then i do this
</STRONG></P>
<pre><strong>[root@echelon /root]# rpm -q cpp
cpp-1.1.2-24
</strong></pre>
<P><STRONG>
so i better upgrade
</STRONG></P>
<pre><strong>[root@echelon /root]# rpm -U cpp-2.96-85.i386.rpm
error: failed dependencies:
libc.so.6(GLIBC_2.2) is needed by cpp-2.96-85
cpp =3D 1.1.2 is needed by egcs-1.1.2-30
cpp =3D 1.1.2 is needed by egcs-objc-1.1.2-30
</strong></pre>
<P><STRONG>
Mmmm i know GLIBC is pretty important so i get the version above & do the
following
</STRONG></P>
<pre><strong>[root@echelon /root]# rpm -q glibc
glibc-2.1.3-22
</strong></pre>
<P><STRONG>
so ok lets upgrade this (or at least try to)
</STRONG></P>
<pre><strong>[root@echelon /root]# rpm -U glibc-2.2-12.i386.rpm
error: failed dependencies:
glibc-common =3D 2.2 is needed by glibc-2.2-12
glibc > 2.1.3 conflicts with db3-3.1.17-4.6x
glibc > 2.1.3 conflicts with rpm-4.0-6x
libdb.so.2 is needed by enlightenment-conf-0.15-9
libdb.so.2 is needed by pan-0.9.1-0_helix_1
libdb.so.2 is needed by ggv-0.95-0_helix_1
libdb.so.2 is needed by pygnome-1.0.53-0_helix_3
[ . . . about 70 more complaints . . . ]
libdb.so.3(GLIBC_2.1) is needed by perl-5.00503-6
libdb.so.3(GLIBC_2.1) is needed by pam-0.72-20.6.x
libdb.so.3(GLIBC_2.1) is needed by php-3.0.18-1.6.x
libdb.so.3(GLIBC_2.1) is needed by sendmail-8.11.0-1
libdb.so.3(GLIBC_2.1) is needed by openldap-1.2.9-6
</strong></pre>
<P><STRONG>
Do you see wehat i am getting at
</STRONG></P>
<P><STRONG>
How would you get around these issues it can become rather frustrating
</STRONG></P>
<P><STRONG>
Any advice on this would be great like always
</STRONG></P>
<P><STRONG>
Thanx guys n girls
</STRONG></P>
<P><STRONG>
Regards
</STRONG></P>
<P><STRONG>
Andrew
</STRONG></P>
<blockQuote>
<IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Thomas]
Hi Andrew,
</blockQuote>
<blockQuote>
Yuck!! You have managed to expose one of the more
annoying features that the RPM format
brings....version dependant files.
</blockQuote>
<blockQuote>
Since every package (or nearly every) is linked to
another, you can imagine just how one package may be
needed by another.
</blockQuote>
<blockQuote>
To try and get arounf your problem, you can specify to
install an RPM file without looking for it's
dependencies, thus:
</blockQuote>
<blockquote><code><font color="#000033"><br>rpm -i --nodeps ./rpmfile-version-3.rpm
</font></code></blockquote>
<blockQuote>
But, one caveat with this, is that if you don't
have/install the dependencies, then the program might
not work.
</blockQuote>
<blockQuote>
Hope That Helps
</blockQuote>
<blockQuote>
<IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Dan]
It is a common problem. The common solution is to upgrade the
installation using the upgrade method provided by the
distribution. It may be time for you to upgrade across-the-board to
Redhat 7.1.
</blockQuote>
<blockQuote>
It is possible to upgrade a distribution piecemeal, but it becomes
more difficult (as you have observed) as the number of dependencies
increases.
</blockQuote>
<blockQuote>
The alternative is going off-distribution and building the specific
things you need from source, one at a time. This is more often not
worth the effort.
</blockQuote>
<blockQuote>
<IMG SRC="../../gx/dennis/bbub.gif" ALT="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
> [Heather]
Heh. Jim calls this "dependency hell". Every distro has it. <A HREF="http://www.debian.org/">Debian</A>
is pretty good about reducing the number of parts in the puzzle -- about
the time you're looking at upgrading glibc, they call it the next version
name, and a lot of people bust their butts to make the upgrade smooth.
Of course, unless you're using <A HREF="http://www.libranet.com/">LibraNet</A> or something, the install is a
bit rocky...
</blockQuote>
<blockQuote>
For staying with an older distro a bit longer (hey, it's not crashing,
why change it much, right?) my common solution is to remove the offending
rpms, use alien (a perl script) to transform deb files from the equivalent
Debian variant, and then use those to provide the libraries and so on, that
just my app needs. I've used this trick to introduce lynx-ssl to a number
of systems that otherwise only come with a non-SSL version, often a bit old.
</blockQuote>
<blockQuote>
Nonetheless, I agree with Dan -- once you've decided to upgrade glibc, it's
time to take your upgrade seriously, and make a new round of it. Distros
vary widely as to whether it's safer to upgrade or to just install
anew; with a good backup of all your personal files (don't forget odd things
like any tweaks you made to config files in <TT>/etc/</TT> or <TT>/usr/lib</TT>, notes about
hardware you have and need support for, etc.) you can try an upgrade, and
<EM>if</EM> it bombs, <EM>then</EM> install fresh.
</blockQuote>
<!-- end 3 -->
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