Re: How can g++ (stable) be incompatible with a fresh stable install?

[Sven Joachim <svenjoac@gmx.de>]

On 2015-01-08 15:14 +0100, Kynn Jones wrote:

> I just did an install from debian-7.7.0-amd64-netinst.iso on my laptop.
>
> When I attempt to install g++, I get the following
>
>     # apt-get -y install g++
>     ...
>     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:
>      g++ : Depends: g++-4.7 (>= 4.7.2-1~) but it is not going to be installed
>     E: Unable to correct problems, you have held broken packages.
>[...]
> 4. The key dependecy chain behind the error shown above goes like this:
>
>     g++ depends on
>     g++-4.7 (>= 4.7.2-1~) depends on
>     libstdc++6-4.7-dev (= 4.7.2-5) depends on
>     libc6-dev (>= 2.13-5) depends on
>     libc6 (= 2.13-38+deb7u4)

That's the problem, apparently your mirror only has libc6-dev
2.13-38+deb7u4, but the current version in wheezy is 2.13-38+deb7u6.
Since the installation CD already contains libc6 2.13-38+deb7u6 but not
libc6-dev, there is a version skew.

What does "apt-cache policy libc6 libc6-dev" print?

Cheers,
       Sven