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