Yum says dependency " libltdl.so.3" is required, but it's already installed?

Question

I have spent a few hours trying to get ImageMagick installed. I finally got an old version uninstalled, but am struggling to get the newest version installed. When I run the following command:

yum --nogpgcheck localinstall ImageMagick-6.9.0-0.i386.rpm

I get the following error:

Error: Package: ImageMagick-6.9.0-0.i386 (/ImageMagick-6.9.0-0.i386)
           Requires: libltdl.so.3

My attempt to get libltdl.so.3 installed

I ran the following command:

repoquery -q -f */libltdl.so*

Which produced:

libtool-ltdl-0:2.2.6-15.5.el6.i686
yaf-0:1.3.2-1.el6.rf.i686
libtool-ltdl-devel-0:2.2.6-15.5.el6.i686

So I tried installing them one by one:

yum install yaf-0:1.3.2-1.el6.rf.i686
yum install libtool-ltdl
yum install libtool-ltdl-devel-0:2.2.6-15.5.el6.i686

But each one failed with:

Package ... installed and latest version

What should I do?

I read to try:

yum clean all
yum update

But that didn't fix the problem. I'm running CENTOS 6.6 i686.

Solution

Based on the output, you're mixing i686 and i386 packages together. You need to take care that you have the appropriate archiecture (i386, i686, x86_64, etc.) for your system's hardware and the other packages you have installed.

So in your case yum is correctly complaining that you don't have the i386 versions of the dependencies installed already.

Error: Package: ImageMagick-6.9.0-0.i386 (/ImageMagick-6.9.0-0.i386)
           Requires: libltdl.so.3

So I'd either try getting the i686 version of ImageMagick's RPM or making sure to install the i386 version of the dependencies.

Now given the fact that repoquery is only showing i686 packages, I'd surmise that no i386 packages are available in any of the repos you have installed/configured on your system. So I'd likely just download the i686 variant of ImageMagick, since it'll likely be the easiest path forward.

Comments

[Deer Hunter]

The operative mantra is 'Don't install an RPM you downloaded manually' unless you know what you are doing. Rebuilding with fpm may be safer, yet the best thing is finding the right repo with actively maintained packages.

[Nate]

I'm running I'm running CENTOS 6.6 i686. I asked a question about whether I should install i368 or x86_64 packages on serverfault and was told i368 would work on a i686 machine. Is that not the case? serverfault.com/questions/615543/…

[slm]

@Nate - Those will work, but the issue is that no repos you have setup are offering them. So I'd go get the i686 version instead.

[Nate]

I'm sorry, but I'm confused about which packages you are referring to when you say "those" and "them." Shouldn't the i386 version of ImageMagick be able to be installed on my i686 server?

[slm]

@Nate - yeah,however the i386 ImageMagick requires other packages, which have to also be i386. In this case there are none to be found that are i386. So switching to ImageMagick i686 will allow your system to use the i686 versions of the dependencies.

[slm]

It's usually wise to not mix architectures (i386, i686, x86_64), for this reason, it can make things more confusing. Unfortunately this is one of those things that you usually miss until it bites you like this, then you learn what it entails.