Install gcc-6-x86-64-linux-gnux32-base by entering the following commands in the terminal:
sudo apt update sudo apt install gcc-6-x86-64-linux-gnux32-base
Description:
GCC, the GNU Compiler Collection (base package)
This package contains files common to all languages and libraries contained in the GNU Compiler Collection (GCC).
Homepage: http://gcc.gnu.org/
Version: 6.4.0-17ubuntu1cross1
Section: universe/devel