Install cpp-6 by entering the following commands in the terminal:
sudo apt update sudo apt install cpp-6
Description:
GNU C preprocessor
A macro processor that is used automatically by the GNU C compiler to transform programs before actual compilation. . This package has been separated from gcc for the benefit of those who require the preprocessor but not the compiler.
Homepage: http://gcc.gnu.org/
Version: 6.4.0-17ubuntu1
Section: universe/interpreters