Apt-get can't install anything due to broken dependencies

Question

Whenever I run apt-get install for any package I get this error

➜  ~ sudo apt-get install clang-5.0

Reading package lists... Done

Building dependency tree       

Reading state information... Done

You might want to run 'apt --fix-broken install' to correct these.

The following packages have unmet dependencies:

 gcc-7-multilib : Depends: libc6-dev-i386 (>= 2.11) but it is not going to be installed

 libc6-dev-x32 : Depends: libc6-dev-i386 (= 2.25-2) but it is not going to be installed

E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

And when I run sudo apt --fix-broken install I get this error

Unpacking libc6-dev-i386 (2.25-2) ...

dpkg: error processing archive /var/cache/apt/archives/libc6-dev-i386_2.25-2_amd64.deb (--unpack):
 trying to overwrite '/usr/include/bits', which is also in package libc6-dev-amd64:i386 2.25-2

Errors were encountered while processing:

 /var/cache/apt/archives/libc6-dev-i386_2.25-2_amd64.deb

E: Sub-process /usr/bin/dpkg returned an error code (1)

Answer 1

I fixed it by first running

sudo dpkg -r libc6-dev-i386

then by running sudo apt-get install libc6-dev-i386.