/usr/share/man/man1/gccxml_cc1plus.1.gz is in gccxml 0.9.0+git20140716-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/gccxml.1.gz
/usr/share/man/man1/gccxml.1.gz