/usr/share/man/man1/x86_64-linux-gnu-gcc-nm.1.gz is in gcc 4:4.9.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/gcc-nm-4.9.1.gz
/usr/share/man/man1/gcc-nm-4.9.1.gz