libboost-thread1.58.0 1.58.0+dfsg-5ubuntu3.1 (i386 binary) in ubuntu xenial

 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.