Install gcc-6-plugin-dev-alpha-linux-gnu by entering the following commands in the terminal:
sudo apt update sudo apt install gcc-6-plugin-dev-alpha-linux-gnu
Description:
Files for GNU GCC plugin development.
This package contains (header) files for GNU GCC plugin development. It is only used for the development of GCC plugins, but not needed to run plugins.
Homepage: http://gcc.gnu.org/
Version: 6.4.0-17ubuntu1cross1
Section: universe/devel