gcc-7-base 7.3.0-16ubuntu3 / usr / lib / gcc / x86_64-linux-gnu / 7.3.0

/usr/lib/gcc/x86_64-linux-gnu/7.3.0 is in gcc-7-base 7.3.0-16ubuntu3.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/gcc/x86_64-linux-gnu/7