/usr/share/pwlib/include/ptbuildopts.h is in libpt-1.10.10-dev 1.10.10-3.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/pwlib/include/../../../include/ptbuildopts.h
/usr/share/pwlib/include/../../../include/ptbuildopts.h