problems upgrading from 14.04 to 16.04

[Tom H]

On Mon, Sep 26, 2016 at 9:26 AM, J.L. Blom <joep at neuroweave.nl> wrote:
> On 26/09/16 14:53, Colin Law wrote:
>>
>> sudo apt-get  remove --purge gcc-5-base
>> sudo apt-get autoremove
>> sudo apt-get install gcc-5-base
>>
>> If that goes ok then
>> sudo apt-get install -f
>
> Thanks. However,  this doesn't work.
> When I gave the first command, this is the result:
>
> joep at laguna:~$ sudo apt-get remove --purge gcc-5-base
> [sudo] password for joep:
> Reading package lists... Done
> Building dependency tree
> Reading state information... Done
> You might want to run 'apt-get -f install' to correct these:
> The following packages have unmet dependencies:
>  gcj-5-jre-lib : Depends: gcc-5-base (>= 5.2.1-23) but it is not going to be
> installed
>  libgcj16 : Depends: gcc-5-base (>= 5.2.1-23) but it is not going to be
> installed
>  libstdc++6 : Depends: gcc-5-base (= 5.4.0-6ubuntu1~16.04.2) but it is not
> going to be installed
>               Breaks: libkolabxml1 (<= 1.1.0-3) but 1.0.1-0ubuntu3 is to be
> installed
>               Breaks: libstdc++6:i386 (!= 5.4.0-6ubuntu1~16.04.2) but
> 6.2.0-3ubuntu11~14.04 is to be installed
>  libstdc++6:i386 : Breaks: libstdc++6 (!= 6.2.0-3ubuntu11~14.04) but
> 5.4.0-6ubuntu1~16.04.2 is to be installed
> E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify
> a solution).
>
> As I see it it' a chicken & egg problem: all packages involved are not
> installed because of the dependencies that aren't solved.
> Is that solvable or do I have to try --force to remove gcc-5-base?

Run
apt-get install -s gcc-5-base=5.4.0-6ubuntu1~16.04.2
to check what'll happen.

If it looks OK, run
apt-get install gcc-5-base=5.4.0-6ubuntu1~16.04.2

If that doesn't work, you'll have to try to force it:

apt-get install -s -o Dpkg::Options::="--force-all"
gcc-5-base=5.4.0-6ubuntu1~16.04.2
then
apt-get install -o Dpkg::Options::="--force-all"
gcc-5-base=5.4.0-6ubuntu1~16.04.2