I already tried this Unable to install GCC, depends gcc-7
It did not work.
Here is what I get
$ sudo apt install gcc
**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:
gcc : Depends: gcc-7 (>= 7.3.0-12~) but it is not going to be installed
*E: Unable to correct problems, you have held broken packages.**
Even sudo apt install build-essential is not working.
My Ubuntu version is 18.04.4.
lsb_release -r)? did you remember to runsudo apt updatefirst? – steeldriver Apr 27 '20 at 14:43