Sirupsen/posix-mqueue — pull request #3 by james-barnard (2014-11-21 23:36:38+00:00)
Title: add have_library(‘rt’) to extconf for ubuntu

gem compiles fine on ubuntu 14.04 but reports error when run:
posix-mqueue-0.0.7/posix/mqueue.so: undefined symbol: mq_open

This change solves this issue.