libevent-core-1.4-2 1.4.14b-stable-0ubuntu1 (armel binary) in ubuntu precise

 The libevent API provides a mechanism to execute a callback function
 when a specific event occurs on a file descriptor or after a timeout
 has been reached.
 .
 libevent is meant to replace the asynchronous event loop found in
 event driven network servers. Currently, libevent supports /dev/poll,
 kqueue(2), event ports, select(2), poll(2) and epoll(4).
 .
 The libevent_core library includes event loops, timers, buffer code,
 and various small compatibility functions.
 .
 If you're writing software that only uses libevent's event loop, you
 should link against only the libevent_core library.