I type in
sudo apt-get install libc6-dev and get the following back:
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 yo uare 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: lib6-dev : Depends: libc6 (= 2.19-0ubuntu6) ut 2.19-0ubuntu6.1 is to be installed Recommends gcc but it is not going to be installed or c-compiler E: Unable to correct problems, you have held broken packages.
I'm running 14.04.1, which is the latest available from http://www.ubuntu.com/download/desktop