/usr/include/urcu/urcu_ref.h is in liburcu-dev 0.7.12-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | #warning "urcu/urcu_ref.h is deprecated. Please include urcu/ref.h instead."
#include <urcu/ref.h>
|