libboost-thread1.65.1 1.65.1+dfsg-0ubuntu2 (amd64 binary) in ubuntu bionic

 This package forms part of the Boost C++ Libraries collection.
 .
 Toolkit for writing C++ programs that execute as multiple,
 asynchronous, independent, threads-of-execution. Each thread has its
 own machine state including program instruction counter and
 registers.