How to install liblog4cxx10-dev with failed dependency? [closed]

Question

When I try to install liblog4cxx10-dev I get the error: liblog4cxx10-dev: Depends: libapr1-dev but it is not going to be installed

What does that mean and how do I fix it?

sam@sam-desktop:~/download/ros_electric$ sudo apt-get install liblog4cxx10-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  liblog4cxx10-dev: Depends: libapr1-dev but it is not going to be installed
                  Depends: libaprutil1-dev but it is not going to be       installed
E: Broken packages

My sources.list:

# deb cdrom:[Ubuntu 10.04.1 LTS _Lucid Lynx_ - Release i386       (20100816.1)]/       lucid main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to       upgrade       to
# newer versions of the distribution.

deb http://mirror.nttu.edu.tw/ubuntu/ lucid main restricted
deb-src http://mirror.nttu.edu.tw/ubuntu/ lucid main restricted

## Major bug fix updates produced after the final release of the
## distribution.

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the             Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://mirror.nttu.edu.tw/ubuntu/ lucid universe
deb-src http://mirror.nttu.edu.tw/ubuntu/ lucid universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the             Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://mirror.nttu.edu.tw/ubuntu/ lucid multiverse
deb-src http://mirror.nttu.edu.tw/ubuntu/ lucid multiverse

## Uncomment the following two lines to add software from the       'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any       review
## or updates from the Ubuntu security team.
# deb http://mirror.nttu.edu.tw/ubuntu/ lucid-backports main restricted             universe multiverse
# deb-src http://mirror.nttu.edu.tw/ubuntu/ lucid-backports main       restricted       universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu lucid partner
# deb-src http://archive.canonical.com/ubuntu lucid partner

deb http://download.virtualbox.org/virtualbox/debian lucid non-free

deb http://security.ubuntu.com/ubuntu lucid-security main restricted
 deb-src http://security.ubuntu.com/ubuntu lucid-security main             restricted
 deb http://security.ubuntu.com/ubuntu lucid-security universe
 deb-src http://security.ubuntu.com/ubuntu lucid-security universe
 deb http://security.ubuntu.com/ubuntu lucid-security multiverse
 deb-src http://security.ubuntu.com/ubuntu lucid-security multiverse

Answer 1

This tends to indicate that there's a package that can't be installed. Sounds like I'm stating the obvious but if you run apt-cache policy libapr1-dev you should see something like this:

libapr1-dev:
  Installed: (none)
  Candidate: 1.4.5-1
  Version table:
     1.4.5-1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages

If the version table is empty, one of your repositories isn't hosting the package like it should. Double check by running a sudo apt-get update and then try it again.

If that doesn't work you should probably consider changing to a different mirror. The package should be on there but it isn't.